投稿時間:2023-07-20 18:32:29 RSSフィード2023-07-20 18:00 分まとめ(36件)

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IT	ITmedia 総合記事一覧	[ITmedia News] カメラ専門展示会「CP＋」は24年もハイブリッド開催に　「参加者の8割が希望」	https://www.itmedia.co.jp/news/articles/2307/20/news148.html	itmedia	2023-07-20 17:28:00
AWS	AWS Japan Blog	NVIDIA Omniverse NucleusのAmazon EC2へのデプロイ方法	https://aws.amazon.com/jp/blogs/news/deploying-nvidia-omniverse-nucleus-on-amazon-ec2/	elasticcomputecloudamazo	2023-07-20 08:20:31
Google	Official Google Blog	How Google Taiwan builds new features and products	https://blog.google/around-the-globe/google-asia/how-google-taiwan-builds-new-features-and-products/	people	2023-07-20 09:50:00
AWS	lambdaタグが付けられた新着投稿 - Qiita	bundle install先に 'vendor/bundle'を指定しないとLambdaでInit error when loading handlerになる	https://qiita.com/does_not_exist/items/e01865ab7ad3500c662a	bundleinstall	2023-07-20 17:28:32
js	JavaScriptタグが付けられた新着投稿 - Qiita	【JavaScript】【Jquery】チェック関連	https://qiita.com/panda-chibi/items/64904ca7a3ca0749c4e8	ifthispropchecked	2023-07-20 17:50:44
GCP	gcpタグが付けられた新着投稿 - Qiita	GCPを使って公開のmavenリポジトリを作る(Gradle)	https://qiita.com/k-kojima-yumemi/items/c00c6dc358fabdf98706	一般公開	2023-07-20 17:04:29
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure Migration 2/4: Deploying a Replication Appliance on a physical Windows Server	https://qiita.com/SatoshiKaneshiro/items/9d5f3d8217d0ad3612a8	appliance	2023-07-20 17:24:44
Ruby	Railsタグが付けられた新着投稿 - Qiita	rails APIのバージョンについて	https://qiita.com/hongjitufang25/items/ee1f500c83b852e46dd0	rails	2023-07-20 17:19:15
技術ブログ	Developers.IO	[UPDATE] Amazon IVSのS3への録画機能で高頻度サムネイルをサポートしました！	https://dev.classmethod.jp/articles/amazon-ivs-higher-frequency-thumbnails-record-s3-feature/	tivevideoserviceamazonivs	2023-07-20 08:49:07
技術ブログ	Developers.IO	[UPDATE] Amazon IVSのS3への自動録画でrendition filteringができるようになりました！	https://dev.classmethod.jp/articles/amazon-ivs-rendition-filtering-record-s3-feature/	tivevideoserviceamazonivs	2023-07-20 08:49:02
技術ブログ	Developers.IO	【CloudFormation】SSM ステートマネージャーを使ってCloudWatch Agentのインストールとログ出力設定を自動化してみる	https://dev.classmethod.jp/articles/cloudformation-ssm-manager-automate-cloudwatch-agent-installation/	cloudformation	2023-07-20 08:34:07
技術ブログ	Developers.IO	Amazon Linux 2023上にRustのWindows向けクロスコンパイル環境を作ってみた	https://dev.classmethod.jp/articles/compile-cross-compile-rust-on-amazon-linux-2023-used-fedora-repo/	amazon	2023-07-20 08:24:09
海外TECH	DEV Community	Mastering Frontend Interview Coding Challenges	https://dev.to/abidullah786/mastering-frontend-interview-coding-challenges-21lp	Mastering Frontend Interview Coding Challenges IntroductionIn the fast paced world of frontend development staying up to date with the latest technologies and mastering essential coding skills is crucial for success Aspiring frontend developers and seasoned professionals alike often face the challenge of showcasing their abilities during interviews To tackle this many companies utilize coding challenges to assess candidates proficiency and problem solving capabilities In this blog we will explore a collection of frontend interview coding challenges that cover a wide range of essential skills and concepts From data fetching to interactive components form validation to game development each challenge is designed to test your knowledge and creativity Whether you re preparing for your next job interview or simply looking to enhance your frontend skills these challenges will provide an excellent opportunity to sharpen your coding prowess So let s dive in and take a closer look at these intriguing frontend interview coding challenges By tackling each challenge you ll not only gain hands on experience but also build a robust portfolio to showcase your expertise to potential employers Let s embark on this exciting journey of frontend exploration and innovation Fetch and Display DataCreate a component that fetches data from an API e g using fetch or Axios and displays it in a list format Handle loading and error states appropriately Todo ListImplement a simple todo list application where users can add new tasks mark tasks as completed and delete tasks Create a Modal ComponentImplement a modal component that overlays the main content and displays additional information or forms The modal should open and close based on user interaction or a specific event A Implement Routing and Navigation Create a multi page application using React Router Build multiple pages components and set up navigation between them using links or buttons User Registration FormCreate a user registration form with fields for name email and password Validate the form inputs and display error messages if necessary Pagination ComponentBuild a pagination component that takes a total number of items and displays a limited number of items per page Allow users to navigate between pages Image CarouselDevelop an image carousel component that displays a slideshow of images with previous and next navigation buttons Login AuthenticationBuild a login authentication system using React and integrate it with a backend service or API Form ValidationCreate a form with various input fields and implement client side form validation using React Drag and DropImplement a drag and drop functionality using React s built in drag and drop APIs or libraries like React DnD Tic Tac Toe GameCreate a tic tac toe game where users can play against each other or against the computer Implement logic to determine the winner Build a Tabs ComponentDevelop a tabs component that displays multiple tab options and shows the corresponding content based on the selected tab Implement the necessary components and state management to handle tab switching Infinite ScrollImplement an infinite scroll feature where new data is loaded as the user scrolls down the page This can be applied to a list of articles posts or any other type of data If you have any questions or insights feel free to share them in the comments Let s continue exploring the world of React development together Connect with me on Twitter Linkedin and GitHub to stay updated and join the discussion	2023-07-20 08:48:57
海外TECH	DEV Community	C# Exception Handling Interview Questions and Answers	https://dev.to/bytehide/c-exception-handling-interview-questions-and-answers-1ib3	C Exception Handling Interview Questions and AnswersAre you preparing for an interview focused on C programming One area that often comes up in both beginner and advanced interviews is exception handling Exception handling in C plays an essential role in making your application robust and reliable Mastering exception handling can give you a significant edge during your interview process To help you confidently tackle this topic in your interview we have put together a comprehensive list of exception handling C interview questions and answers that delve into various aspects of the subject What are the key differences between Exception and SystemException classes in C exception handling hierarchy AnswerThe main differences between Exception and SystemException classes in C lie in their usage and purpose Here are the key differences Hierarchy Both Exception and SystemException classes are part of the exception handling hierarchy in C The Exception class acts as the base class for all exceptions whereas SystemException is a derived class that inherits from the Exception class Usage The Exception class is used as a base class for defining custom exception classes which are specific to the application On the other hand the SystemException class is used as a base class for exceptions thrown by the CLR Common Language Runtime and the core NET Framework libraries Purpose Exception Provides a generic base class for handling exceptions and creating custom exception classes that are relevant to the domain of the application SystemException Represents runtime errors or errors specific to the system and NET Framework These errors usually indicate issues with the CLR or one of the core NET Framework libraries In summary the Exception class is the main base class for all exceptions whereas the SystemException class is used for handling system specific exceptions raised by the CLR and NET Framework libraries How do you create a custom exception class that inherits from ApplicationException Additionally how should you modify this approach in light of best practices AnswerTo create a custom exception class that inherits from ApplicationException follow these steps Define a new class that inherits from ApplicationException Implement required constructors for the new exception class Here s an example of a custom exception class that inherits from ApplicationException public class CustomException ApplicationException public CustomException public CustomException string message base message public CustomException string message Exception innerException base message innerException However it is essential to note that deriving custom exceptions directly from ApplicationException is not considered a best practice in modern C Instead it is recommended to inherit custom exceptions directly from the Exception class Here s an example of a custom exception class that follows best practices and inherits from Exception public class CustomException Exception public CustomException public CustomException string message base message public CustomException string message Exception innerException base message innerException The best practice of inheriting custom exceptions from the Exception class allows clearer hierarchies while maintaining readability and consistency in code What are the performance implications of using throw vs throw ex when rethrowing exceptions and why is one method recommended over the other AnswerWhen rethrowing exceptions in C it is essential to understand the difference between using throw and throw ex to preserve the original exception s information and stack trace throw When you use throw without specifying the exception object the current exception being handled is rethrown and the original exception s stack trace is maintained This is the recommended method for rethrowing exceptions as it preserves valuable debugging information about the original exception throw ex When you use throw ex you rethrow the exception objectーexーbut lose the original exception s stack trace Instead a new stack trace is generated from the point where throw ex is called This can make it challenging to debug and trace the original source of the exception which is why it is generally discouraged Using throw instead of throw ex helps maintain the exception context and stack trace which is crucial for debugging logging and analyzing exceptions in your application How would you handle exceptions arising in a finally block to ensure all exceptions are logged and prevent masking the original exception AnswerHandling exceptions that arise in a finally block can be challenging as you want to ensure that all exceptions are logged and prevent masking the original exception To handle this scenario effectively you can use the following approach Declare a variable to store the original exception if any exception is thrown in the finally block Use a nested try catch block inside the finally block to catch any exceptions thrown within the block In the catch block inside finally store the original exception if any into the declared variable After the finally block check if the variable contains an exception If so either log the exception throw it again or handle it in some other appropriate manner Here s an example of this approach Exception originalException null try Code that can throw an exception catch Exception ex Log or handle the caught exception originalException ex finally try Code that can throw an exception in the finally block catch Exception ex Log or handle the exception thrown in the finally block if originalException null Log rethrow or handle the originalException as needed This approach ensures that any exceptions thrown in the finally block are appropriately logged or handled without masking the original exception that occurred within the try block How can you use exception filters in C and above to add conditional logic without needing additional catch blocks AnswerException filters introduced in C allow you to add conditional logic to catch blocks without the need for additional nested catch blocks Exception filters enable you to specify a condition using the when keyword which must evaluate to true for the catch block to be executed Using exception filters provides the following benefits Improves code readability by reducing the need for nested catch blocks Helps maintain the original exception s stack trace as the exception isn t caught until the filter condition is met Allows you to handle multiple exception types with a single catch block based on the filter conditions Here s an example of using exception filters in C try Code that can throw an exception catch InvalidOperationException ex when ex Message Contains InvalidOperation Handle InvalidOperationException with a specific message catch InvalidOperationException Handle other InvalidOperationException instances catch Exception ex when ex Message StartsWith Error Handle other exceptions with a message starting with Error In the example above the catch blocks are executed based on the conditions specified in the when keyword This allows you to handle different exceptions and scenarios with clean and readable code As you progress through this comprehensive guide of exception handling in C interview questions remember that understanding the basics and keeping up to date with the latest language features will empower you to handle even the most challenging interview scenarios Now let s move on to another crucial topic that often comes up when working with asynchronous programming in C Describe a potential deadlocking scenario when using asynchronous programming in C and handling exceptions How can you avoid this deadlock AnswerIn asynchronous programming a potential deadlocking scenario can occur when using incorrect approaches to handle exceptions and synchronously calling asynchronous methods Here s an example of such a scenario public async Task ProcessDataAsync string data await GetRemoteDataAsync try await SaveDataAsync data catch Exception ex Handle the exception here public async void Button Click object sender RoutedEventArgs e This line can lead to a deadlock ProcessDataAsync Wait In the example above the ProcessDataAsync method is called from an event handler where the Wait method is used to make the asynchronous call synchronous This approach can result in a deadlock since the UI thread is blocked waiting for ProcessDataAsync to complete while the method itself awaits some continuation to be executed on the UI thread To avoid the deadlock you should follow these best practices when handling exceptions in asynchronous programming Make the event handler asynchronous and use the await keyword instead of Wait or Result public async void Button Click object sender RoutedEventArgs e await ProcessDataAsync Use ConfigureAwait false on tasks that don t need to resume on the original context which helps prevent deadlocks public async Task ProcessDataAsync string data await GetRemoteDataAsync ConfigureAwait false try await SaveDataAsync data ConfigureAwait false catch Exception ex Handle the exception here By following these best practices you can avoid deadlocking scenarios when working with exceptions and asynchronous programming in C What are the key differences between AggregateException TargetInvocationException and AggregateException InnerException in the context of exception handling in C Answer AggregateException This is a special exception type that can hold multiple exceptions within its InnerExceptions property AggregateException is primarily used in the Task Parallel Library TPL to handle scenarios where a single operation spawns multiple tasks and one or more of these tasks throw an exception By using AggregateException the TPL can collect all the exceptions raised by the individual tasks and present them as a single object for exception handling TargetInvocationException This exception is thrown when a method called via reflection e g using MethodInfo Invoke throws an exception The InnerException property of the TargetInvocationException object holds the actual exception that was thrown by the target method When handling TargetInvocationException it s essential to check and handle its InnerException property to get the relevant information about the original exception AggregateException InnerException This property is a convenience property of the AggregateException class that returns the first exception within the InnerExceptions collection or null if the collection is empty This property is useful when working with an AggregateException containing a single exception However to handle all exceptions when there are multiple exceptions within the InnerExceptions collection you should iterate through the collection and handle each exception individually In summary AggregateException is used for handling multiple exceptions raised by tasks in parallel operations while TargetInvocationException is used for handling exceptions when calling methods via reflection In both cases it s important to analyze the InnerException or InnerExceptions properties to understand and handle the original exceptions effectively How can you implement exception handling in C to handle cross thread exceptions specifically when working with the Task class and Parallel library AnswerWhen using the Task class and Parallel library in C you re likely to encounter cross thread exceptions as these classes often execute code in different threads Implementing exception handling for cross thread exceptions can be done by following these best practices Task class When working with tasks use the ContinueWith method to handle task related exceptions The TaskContinuationOptions OnlyOnFaulted option ensures that the continuation only runs if the antecedent task has thrown an exception For example Task Run gt Code that can throw an exception ContinueWith antecedentTask gt Handle the exception from the antecedent task var exception antecedentTask Exception TaskContinuationOptions OnlyOnFaulted Parallel library When using the Parallel library e g Parallel ForEach Parallel Invoke the AggregateException is thrown when one or more tasks encounter an exception You can catch AggregateException to handle cross thread exceptions and then use the InnerExceptions property to access individual exceptions For example try Parallel ForEach data item gt Code that can throw an exception catch AggregateException aggregateEx foreach var innerEx in aggregateEx Flatten InnerExceptions Handle each individual exception By following these best practices you can effectively implement exception handling for cross thread exceptions when working with the Task class and Parallel library in C In both cases it s important to analyze the exceptions within the Task or AggregateException objects to handle the exceptions appropriately How does the ExceptionDispatchInfo class enable capturing and preserving exception stack traces for asynchronous methods and what are the key benefits of using this class AnswerThe ExceptionDispatchInfo class in C introduced in NET Framework and NET Core allows you to capture an exception including its stack trace and original context and throw it again at a later point while preserving the original information This capability is particularly useful in asynchronous methods where rethrowing exceptions with the classic throw statement would generate a new exception and wipe out the original exception s stack trace To use the ExceptionDispatchInfo class Call the ExceptionDispatchInfo Capture method passing in the exception you want to capture This method returns an ExceptionDispatchInfo instance ExceptionDispatchInfo capturedException ExceptionDispatchInfo Capture exception Call the Throw method on the ExceptionDispatchInfo instance when you want to rethrow the captured exception including its original stack trace and context capturedException Throw Using the ExceptionDispatchInfo class provides some key benefits such as Original stack trace preservation The class enables you to rethrow exceptions without losing the original stack trace making it easier to identify and debug issues in your application Exception context information It allows you to preserve the original context of the exception including captured local variables which can help improve the debugging process Cross thread exception propagation When dealing with asynchronous methods and multi threaded scenarios this class is useful for propagating exceptions between threads while maintaining their original context and stack traces What is the potential impact of first chance vs second chance exceptions on application performance and how should you approach handling these exceptions in C AnswerIn the context of exception handling in C first chance and second chance exceptions are terms used to describe the different stages at which an application s debugger can be notified about an exception First chance exceptions When an exception occurs the Common Language Runtime CLR checks if there s a corresponding catch block to handle the exception Before executing the catch block the debugger gets notified with a first chance exception event In most cases first chance exceptions do not cause any performance impact as they represent normal exceptions that are expected to be caught and handled by the application Ideally you should only log or handle first chance exceptions during development and debugging to help identify potential issues early It is generally not necessary or recommended to handle first chance exceptions in production code as this can introduce overhead and negatively impact application performance Second chance exceptions If the CLR doesn t find a matching catch block to handle the exception the debugger gets notified again with a second chance exception event At this point the exception is considered unhandled and the application will be terminated by default Second chance exceptions can potentially have a significant impact on application performance and stability as they indicate unhandled exceptions that can cause application crashes To handle first chance and second chance exceptions effectively in C For first chance exceptions during development and debugging ensure that your application catches and handles exceptions gracefully This includes adding proper try catch blocks logging exceptions and responding appropriately to exception conditions to ensure the application continues to function as expected For second chance exceptions adding global exception handling mechanisms such as the AppDomain UnhandledException event for console applications or Application DispatcherUnhandledException event for WPF applications can help you log unhandled exceptions and potentially perform cleanup tasks before the application is terminated Remember that handling second chance exceptions in production code to keep the application running is generally not recommended as this can lead to further issues and instability Handling these exceptions should primarily be used for logging diagnostics and attempting cleanup tasks before the application exits Halfway through our list of exception handling interview questions in C it s clear that a solid foundation in exception handling is necessary for an effective C developer By now you should have gained valuable insights into various facets of exception handling As we explore further let s touch upon an area that focuses on maintaining consistency in error handling when working with C extension methods How do you ensure exception neutrality when working with C extension methods and why is this important for maintaining consistent exception handling AnswerException neutrality means that a method should only throw exceptions that occur during the execution of its code and should not introduce new exceptions or change existing ones ensuring consistent behavior in the exception handling process Maintaining exception neutrality in C extension methods is important for several reasons It allows extension methods to be transparent to the calling code in terms of exception handling promoting more predictable and consistent behavior It prevents confusion when debugging as adding or altering exceptions in extension methods could lead to misleading error messages and difficulty identifying the root cause of the exception To ensure exception neutrality in extension methods follow these guidelines Avoid swallowing exceptions Do not catch and ignore exceptions within the extension method unless there s a specific reason or requirement to do so Let the original exception propagate to the calling code public static string ToUpperCase this string input Do not catch or alter exceptions within the extension method return input ToUpper Do not add new exceptions Avoid introducing new exceptions that are not relevant to the extension method s functionality public static string ToUpperCase this string input Do not add new exceptions unrelated to the extension method s functionality if input null throw new ArgumentNullException nameof input Don t do this return input ToUpper Do not alter existing exceptions When using other functions within an extension method avoid altering the exceptions thrown by those functions Allow any exceptions that originate from the called functions to propagate naturally and be caught by the calling code public static string CustomFunction this string input try Perform some operation catch Exception ex Do not modify or wrap the original exception throw Preserve original exception instead of throw new CustomException Message ex What is a double fault exception and how can you effectively handle this scenario in C while maintaining useful debugging information AnswerA double fault exception occurs when an exception is raised while the application is already handling another exception These situations can be challenging to manage and debug because the exception raised during the handling process can potentially mask or overwrite the original exception making it difficult to identify the root cause of the initial issue To handle double fault exceptions effectively in C and maintain useful debugging information you can follow these steps Use nested try catch blocks Use nested try catch blocks to handle specific exceptions within the outer catch block and preserve the original exception try Perform some operation that might throw an exception catch Exception ex try Attempt to handle the exception e g log the exception or perform cleanup catch Exception ex Handle the double fault exception e g log the exception or perform additional cleanup Preserve the original exception ex for debugging purposes Use the ExceptionDispatchInfo class Use the ExceptionDispatchInfo class to capture both the original exception and the exception raised during handling preserving their stack traces and contexts ExceptionDispatchInfo originalException null try Perform some operation that might throw an exception catch Exception ex originalException ExceptionDispatchInfo Capture ex Attempt to handle the exception e g log the exception or perform cleanup if originalException null try Perform additional handling or cleanup catch Exception ex Preserve the original exception for debugging purposes originalException Throw How does the Common Language Runtime CLR handle exceptions that occur during the Just In Time JIT compilation process in C AnswerThe Just In Time JIT compilation process is responsible for converting the Common Intermediate Language CIL code into executable machine code during the execution of a NET application Issues can arise during JIT compilation such as memory corruption or invalid metadata which can lead to exceptions When an exception occurs during the JIT compilation process the Common Language Runtime CLR handles it as follows JIT compilation failure If the exception is related to the JIT compilation process itself such as a failure to generate valid machine code the CLR will typically throw an InvalidProgramException This exception indicates that the program cannot be executed because it contains invalid IL code or its metadata is corrupted Type initialization issues If the JIT compilation issue is related to type initialization such as an exception occurring in a static constructor or the initialization of a static field the CLR will throw a TypeInitializationException This exception wraps the original exception that occurred during the type initialization process and provides additional information about the problematic type In both cases when an exception occurs during JIT compilation the application will typically be terminated as it indicates a critical issue with the application s code or metadata To resolve these exceptions it s essential to investigate the root cause by analyzing the application code ensuring proper type initialization and fixing any metadata corruption issues To help diagnose JIT compilation exceptions debugging tools like Visual Studio WinDbg or SOS Son of Strike can be used to inspect the managed call stacks IL code and metadata for relevant information How can you use the Marshal GetExceptionPointers and Marshal GetExceptionCode methods to capture low level exception information for debugging purposes in C AnswerMarshal GetExceptionPointers and Marshal GetExceptionCode are methods provided by the System Runtime InteropServices Marshal class in C These methods can be used to capture low level exception information that occurs during Structured Exception Handling SEH in the Windows operating system such as access violation or division by zero errors To use these methods you need to use the try and catch blocks available in C CLI or use P Invoke to call native Windows API functions However using these methods directly in C is not possible as C does not support SEH Here s an example of accessing these methods in a mixed mode assembly using C CLI pragma managed push off include lt windows h gt pragma managed pop using namespace System using namespace System Runtime InteropServices int GetSEHExceptionCode try int a int b int result a b Will cause a division by zero exception except EXCEPTION EXECUTE HANDLER int exceptionCode Marshal GetExceptionCode Console WriteLine Exception code exceptionCode IntPtr exceptionPointers Marshal GetExceptionPointers EXCEPTION POINTERS pExceptionPointers static cast lt EXCEPTION POINTERS gt exceptionPointers ToPointer Console WriteLine Exception address IntPtr pExceptionPointers gt ExceptionRecord gt ExceptionAddress return It s essential to note that using low level SEH mechanisms and mixed mode assemblies can lead to potential issues and pitfalls such as making your code harder to read and maintain reducing portability and increasing the risk of memory related issues In most scenarios it s advised to use standard C exception handling using try catch finally blocks as they provide a more straightforward and managed way of handling exceptions Describe the Corrupted State Exception CSE in C and its implications for exception handling How do you use the HandleProcessCorruptedStateExceptionsAttribute to handle CSEs AnswerA Corrupted State Exception CSE is a type of exception that occurs when the CLR encounters a process state corruption typically triggered by an external event or hardware failure Examples of CSEs include insufficient memory conditions access violation or stack overflow By default the CLR does not allow these exceptions to be caught as they might indicate potentially dangerous conditions or undiagnosable code issues However there might be scenarios where you need to handle a CSE such as logging information about the corruption or attempting to perform additional cleanup In these cases you can use the HandleProcessCorruptedStateExceptionsAttribute attribute in conjunction with the SecurityCriticalAttribute Here s an example of how you can use these attributes to handle CSEs using System using System Runtime ExceptionServices using System Security public class CorruptedStateExceptionExample HandleProcessCorruptedStateExceptions SecurityCritical public void HandleCSE try Perform some operation that might cause a corrupted state exception catch Exception ex Console WriteLine Caught Corrupted State Exception ex Message Log the exception perform cleanup or take other handling actions Keep in mind that handling CSEs should only be done in specific scenarios and with caution Catching and handling a CSE might lead to additional errors or instability because the process state is already corrupted As we delve deeper into our C exception handling interview questions it s essential to remember that thoughtful application of exception handling techniques can genuinely make the difference between an elegant application that gracefully deals with problems and a fragile one that is difficult to debug and maintain In this next section we will discuss some potential pitfalls when using the using statement and how to work around these issues What are the potential pitfalls of using the using statement in relation to exception handling in C and how can you work around these issues AnswerThe using statement in C is a convenient way of managing resources such as file streams or database connections It ensures that the Dispose method is called on the object implementing the IDisposable interface when leaving the scope of the using block While the using statement simplifies resource management there are potential pitfalls related to exception handling Exception in constructor If an exception occurs during the construction of the IDisposable object the Dispose method will not be called as the object has not been fully instantiated This could lead to resource leaks Workaround Explicitly create the object outside of the using block use a try catch finally block and call Dispose in the finally block if the object has been successfully created IDisposableObject obj null try obj new IDisposableObject Perform operations with the object catch Exception ex Handle exception finally obj Dispose Call Dispose if the object has been instantiated Exception in the dispose method If an exception occurs during the execution of the Dispose method the exception will propagate out of the using block potentially masking any preceding exceptions Workaround Implement the Dispose method of the IDisposable object using a try catch block taking care of logging or handling exceptions gracefully within the method without propagating them public class IDisposableObject IDisposable public void Dispose try Perform cleanup and resource deallocation catch Exception ex Log the exception taking appropriate actions without propagating the exception By being aware of these potential pitfalls and applying the appropriate workarounds you can ensure proper exception handling in your application while still taking advantage of the convenience and resource management benefits provided by the using statement What are the trade offs between using specialized exception classes e g FileNotFoundException and using the general purpose Exception class when designing a custom exception handling strategy in C AnswerWhen designing a custom exception handling strategy in C you need to balance between using specialized exception classes and using the general purpose Exception class Here are the main trade offs between the two approaches Specialized Exception ClassesAdvantages More expressive and easier to understand Using specialized exception classes allows you to convey more specific information about the error Better error handling Allows the code that catches the exception to distinguish between different error types and take appropriate actions for each type Easier debugging and maintenance Specialized exception classes can provide additional properties or methods that help in identifying the root cause of the problem and make the debugging process easier Disadvantages More complex to implement Creating and managing multiple custom exception classes can be more time consuming and complex than using a single general purpose class Potential for overengineering Creating too many specialized exception classes can lead to unnecessary complexity and potentially make the code harder to understand and maintain General Purpose Exception Class Exception Advantages Simplified implementation Using the general purpose Exception class can simplify the exception handling code and reduce the number of custom exception classes Easier to maintain Having fewer custom exception classes reduces the complexity of the code and makes it easier to maintain Disadvantages Less expressive Using the general purpose Exception class can make it more difficult to determine the specific cause of an error Limited error handling Since all exceptions are instances of the same class the code that catches the exception cannot easily distinguish between different error types making it harder to perform fine grained error handling The best approach varies based on your specific scenario and requirements In general it s a good practice to use specialized exception classes for distinct error scenarios that require unique handling or where additional context is needed If the exception doesn t require specific handling you can use the general purpose Exception class to reduce complexity In C what are the critical considerations to keep in mind when implementing exception handling for cross AppDomain communication AnswerWhen implementing exception handling for cross AppDomain communication in C applications you need to consider several aspects to ensure proper functioning and data consistency Some critical considerations are Serialization Deserialization Exceptions need to be serializable to propagate across AppDomains If a custom exception class isn t marked with the Serializable attribute it cannot be passed between AppDomains and a SerializationException will be thrown Ensure that any custom exception classes are marked with the Serializable attribute and implement the required serialization logic when needed AppDomain Unloading When an AppDomain is unloaded the AppDomainUnloadedException may occur during cross AppDomain communication Ensure that your exception handling strategy accounts for this type of exception and takes the appropriate action Type Availability Custom exception classes must be available in both the source and target AppDomains If a custom exception class is not available in the target AppDomain a SerializationException will be thrown Ensure that the assembly containing the custom exception class is loaded into both AppDomains Data Integrity Ensure that the exception handling strategy does not disrupt data integrity across AppDomains For example consider using a two phase commit protocol to ensure data consistency between AppDomains Performance Cross AppDomain exception handling can introduce a performance overhead due to serialization and deserialization Keep this in mind when designing your exception handling strategy and evaluate whether it s necessary to pass the exception details across AppDomains By addressing these considerations you can ensure proper exception handling and maintain proper behavior during cross AppDomain communication in your C applications How do you handle exceptions that occur in a System Tuple or ValueTuple within your C code and what are the best practices for managing this scenario AnswerTuples System Tuple and ValueTuple can store multiple values in a single object but they don t inherently have special exception handling behavior Exceptions may be thrown when accessing or assigning values to a tuple within your C code just like with any other object or value type Handling exceptions that occur in tuples follows the same best practices as for other C code Use try catch finally Blocks Surround the code that works with the tuple e g accessing or assigning values with a try catch finally block Catch any specific exceptions you expect and use a generic catch block e g catch Exception ex for any unexpected exceptions try int x int y tuple int result tuple x tuple y catch DivideByZeroException ex Handle divide by zero case catch Exception ex Handle any other exceptions Keep Exception Handling Focused Keep the scope of your try block as small and focused as possible to ensure that you re catching the exceptions you expect and not inadvertently catching unrelated exceptions Don t Swallow Exceptions Avoid catching exceptions without handling them or rethrowing them unless absolutely necessary Swallowed exceptions can make debugging more challenging and may hide critical issues Document Exceptions Use XML comments to document any exceptions that a method might throw to help the caller understand and handle errors appropriately Lastly if you re using tuples to pass values between methods ensure proper exception handling when dealing with operations that might throw an exception within those methods as well In the context of Structured Exception Handling SEH in C describe the key differences between the catch and except blocks and provide examples of scenarios where one is preferable over the other AnswerIn the context of Structured Exception Handling SEH in C catch blocks and except blocks are used to handle exceptions resulting from various error conditions While both blocks allow you to handle exceptions there are critical differences between them Catch Block catch is a C keyword that is part of the try catch finally statement used to catch exceptions thrown by managed code executed within the try block Provides a more straightforward high level approach of handling exceptions which is in line with the NET Framework and the C language s best practices It can catch both managed and unmanaged exceptions when compiled for the NET Framework In NET Core and later it can particularly catch managed exceptions try Code that may throw an exception catch FileNotFoundException ex Handle a specific FileNotFoundException catch Exception ex Handle all other exceptions Except Block except is a keyword specific to the Windows operating system and is part of Structured Exception Handling SEH used mainly in native C C code As except is not available in C directly it can be used in mixed mode assemblies with C CLI code or through P Invoke with the native Windows API Its primary purpose is to catch low level hardware and operating system related exceptions such as access violations stack overflows and division by zero try Code that may cause a low level exception except EXCEPTION EXECUTE HANDLER Handle the exception As a general rule in C you should prefer using the catch block in try catch finally statements to handle exceptions The catch block is the standard C approach and works consistently with the rest of the NET Framework and CLR Only consider using the except block in specific scenarios where you need to deal with low level native exceptions or if you re working with mixed mode assemblies or P Invoke calls to native code In conclusion this comprehensive collection of exception handling in C interview questions provides you with the knowledge and confidence to tackle the often challenging subject of exception handling during your C interviews Whether you re a beginner just starting in C or an experienced developer mastering exception handling concepts and techniques will help you build robust reliable and maintainable applications Best of luck in your interview preparations Remember practice and understanding these concepts will lead to success in your journey as a C developer	2023-07-20 08:32:22
海外TECH	DEV Community	artificial intelligence google	https://dev.to/tech12lismel/artificial-intelligence-google-lbh	artificial intelligence googleUnleashing the Power of Artificial Intelligence How Google is Leading the WayIn the ever evolving world of technology one phenomenon has captured the attention and imagination of both experts and enthusiasts alike artificial intelligence AI With its potential to transform industries and revolutionize the way we live and work AI has become a hot topic of discussion And when it comes to AI leadership one company stands out among the rest Google Known for its innovative approach and cutting edge advancements Google has harnessed the power of AI to drive groundbreaking solutions and shape the future From personalized search results to voice assistants and self driving cars Google s commitment to AI is unparalleled In this article we will explore the various ways in which Google is unleashing the power of artificial intelligence and paving the way for a future that is both exciting and transformative So let s dive in and discover the incredible advancements that Google is making in the realm of AI What is Google s role in AI Google s role in AI cannot be overstated As one of the world s leading technology companies Google has invested significant resources into AI research and development With a team of talented engineers and scientists Google is at the forefront of AI innovation The company s mission is to organize the world s information and make it universally accessible and useful and AI plays a crucial role in achieving this goal Through its various products and services Google is leveraging AI to enhance user experiences improve efficiency and solve complex problems But what are these AI powered products and services that Google offers Let s find out Google s AI powered products and servicesGoogle s AI powered products and services have become an integral part of our daily lives From the moment we wake up to when we go to bed we interact with Google s AI technologies in various ways One of the most prominent examples is Google Search By utilizing AI algorithms Google is able to provide users with personalized search results that are tailored to their specific needs and preferences This not only improves the user experience but also increases the relevance and accuracy of search results Additionally Google s AI powered products like Google Photos and Google Maps use machine learning to organize and analyze vast amounts of data making it easier for users to find and navigate information These products have become indispensable tools for millions of people around the world Complete an essay	2023-07-20 08:20:04
海外TECH	Engadget	Kevin Mitnick, formerly the world’s ‘most-wanted’ hacker, has passed away	https://www.engadget.com/kevin-mitnick-formerly-the-worlds-most-wanted-hacker-has-passed-away-084912966.html?src=rss	Kevin Mitnick formerly the world s most wanted hacker has passed awayKevin Mitnick who was once one of the world s most wanted computer hackers has passed away at on July th According to his obituary Mitnick battled pancreatic cancer for more than a year and was undergoing treatment at the University of Pittsburgh Medical Center quot M uch of his life reads like a fiction story quot his obituary reads and that s perhaps the perfect way to describe his tale The first time Mitnick infiltrated a computer system was way back in but it wasn t until that he was convicted and sentenced to months in prison for copying a company s software He broke into Pacific Bell s voicemail computers when he was under supervised release and then continued to hack into cell networks as well as company and government websites as a fugitive in the s Mitnick was also involved in the theft of thousands of files and credit card numbers but his obituary says he quot never took one dime from any of his victims quot He was eventually caught in and charged with illegal use of a telephone access device and computer fraud Apparently authorities believed he had access to corporate trade secrets worth millions of dollars at the time Mitnick spent five years in prison which he described as a quot vacation quot by the time he was freed From there he changed the course of his career and chose to become a White Hat hacker and cybersecurity consultant In he became part owner and chief hacking officer of KnowBe which provides security awareness training and a simulated phishing platform to clients Before all these happened Mitnick figured out how to game LA s public transportation system at years old by memorizing bus schedules and punch cards and then obtaining his own punch tool systems so he could ride buses all day Mitnick is survived by his wife Kimberley Mitnick and their unborn child This article originally appeared on Engadget at	2023-07-20 08:49:12
医療系	医療介護 CBnews	福祉用具の事故防止で「ヒヤリ・ハット情報共有を」-専門相談員指定講習の見直し検討も、厚労省検討会	https://www.cbnews.jp/news/entry/20230720172342	ldquo	2023-07-20 17:50:00
医療系	医療介護 CBnews	インフルエンザやMRなどのワクチン接種4件認定-厚労省が感染症・予防接種審査分科会審議結果公表	https://www.cbnews.jp/news/entry/20230720171434	予防接種	2023-07-20 17:35:00
海外ニュース	Japan Times latest articles	Soccer feeling the heat from Japan’s scorching summer	https://www.japantimes.co.jp/sports/2023/07/20/soccer/amateur-league-heat-postponements/	Soccer feeling the heat from Japan s scorching summerPostponements of matches reflect the growing challenges facing amateur teams as they attempt to cope with Japan s increasingly hostile summer months	2023-07-20 17:25:04
ニュース	BBC News - Home	Disruption expected as senior doctors stage first strike in a decade	https://www.bbc.co.uk/news/health-66251049?at_medium=RSS&at_campaign=KARANGA	christmas	2023-07-20 08:13:53
ニュース	BBC News - Home	New Zealand: Shooting in Auckland before World Cup kills two	https://www.bbc.co.uk/news/world-asia-66252727?at_medium=RSS&at_campaign=KARANGA	control	2023-07-20 08:05:33
ニュース	BBC News - Home	Police search for suspected lion roaming Berlin area	https://www.bbc.co.uk/news/world-europe-66254908?at_medium=RSS&at_campaign=KARANGA	berlin	2023-07-20 08:35:17
ニュース	BBC News - Home	Netflix password crackdown fuels jump in subscribers	https://www.bbc.co.uk/news/business-66240390?at_medium=RSS&at_campaign=KARANGA	hollywood	2023-07-20 08:34:51
ニュース	BBC News - Home	Manipur: India outrage after two women paraded naked in violence-hit state	https://www.bbc.co.uk/news/world-asia-india-66253389?at_medium=RSS&at_campaign=KARANGA	india	2023-07-20 08:42:13
ニュース	BBC News - Home	Women's World Cup 2023: Hannah Wilkinson fires New Zealand ahead against Norway	https://www.bbc.co.uk/sport/av/football/66254690?at_medium=RSS&at_campaign=KARANGA	Women x s World Cup Hannah Wilkinson fires New Zealand ahead against NorwayWatch as Hannah Wilkinson scores the opening goal of the Women s World Cup by firing co hosts New Zealand ahead against Norway in the early stages of the second half	2023-07-20 08:27:49
ニュース	Newsweek	韓国は嫌だ、「日本に行きたかった...」 亡命失敗した北朝鮮エリートの残酷な運命...脱北者が韓国を避ける理由	https://www.newsweekjapan.jp/stories/world/2023/07/post-102227.php	【動画】韓国の当局者が、抵抗する脱北者を無理やり引きずって板門店で北朝鮮に強制送還したショッキングな場面昨年月日の朝鮮人民革命軍創建周年を前に、咸鏡北道保衛局が幹部の家族に特別配給を行うために出漁を命じたが、整備もされていない老朽化した船で出港させたことが事故の原因と見られていた。	2023-07-20 17:24:00
IT	週刊アスキー	レブコム、音声解析AI電話「MiiTel」に他社電話データの分析や他社システムへのデータ送信機能を追加	https://weekly.ascii.jp/elem/000/004/146/4146123/	miitel	2023-07-20 17:45:00
IT	週刊アスキー	サンワサプライ、USB Type-CとLightning対応のUSBケーブル「500-IPLM031BK」を発売	https://weekly.ascii.jp/elem/000/004/146/4146131/	iplmbk	2023-07-20 17:45:00
IT	週刊アスキー	Android版Airdrop機能「ニアバイシェア」のWindows版アプリが一般公開	https://weekly.ascii.jp/elem/000/004/146/4146122/	airdrop	2023-07-20 17:40:00
IT	週刊アスキー	犬族と猫族の対立を描く！新作タクティカルSRPG『クロステイルズ』本日発売	https://weekly.ascii.jp/elem/000/004/146/4146132/	nintendo	2023-07-20 17:35:00
IT	週刊アスキー	「Steelcase Karman」は小柄だけどゲーム向けにも！ 未来感溢れるエルゴノミクスチェアに座ってきた	https://weekly.ascii.jp/elem/000/004/145/4145972/	steelcase	2023-07-20 17:30:00
IT	週刊アスキー	様々なコンテンツを体験できる限定型カフェ！ 「BOX cafe&space 博多マルイ店」	https://weekly.ascii.jp/elem/000/004/146/4146094/	boxcafeampspace	2023-07-20 17:30:00
IT	週刊アスキー	USB Type-Cポートしかない機器にUSB Type-A周辺機器を接続できるホストケーブル「池尻3丁目／AR-CHOS65」	https://weekly.ascii.jp/elem/000/004/146/4146120/	android	2023-07-20 17:30:00
IT	週刊アスキー	大迫力の大蛇山の山車を見よう！ 福岡県大牟田市にて「おおむた『大蛇山』まつり」開催	https://weekly.ascii.jp/elem/000/004/146/4146066/	福岡県大牟田市	2023-07-20 17:15:00
IT	週刊アスキー	スパイク・チュンソフトがPS Storeで「サマーセール」を開催中！38タイトルが最大88％オフ	https://weekly.ascii.jp/elem/000/004/146/4146127/	playstation	2023-07-20 17:10:00
マーケティング	AdverTimes	Coke ONが示す3つのヒント アプリを販売促進につなげるには？	https://www.advertimes.com/20230720/article427729/	cokeon	2023-07-20 08:08:38