C# .Net Quizz Dive into our tech quiz zone and put your technical skills to the test! Our quizzes cover a wide array of technical topics, perfect for sharpening your knowledge and challenging your understanding. Compete with others, see your rankings, and boost your technical proficiency. Start quizzing today! 1 / 29 1. Which class in the .NET Framework provides a mechanism to schedule and execute background tasks? Timer ThreadPool Task Thread 2 / 29 2. What is the primary purpose of reflection in C#? To execute code at runtime To inspect and interact with types at runtime To compile code dynamically To handle exceptions 3 / 29 3. What is the primary benefit of the Dependency Injection pattern? Enhanced code reusability Improved testability and flexibility Improved code readability Reduced code complexity 4 / 29 4. What does the DbContext class represent in Entity Framework? The database migrations The database schema The connection string to the database The session with the database and allows querying and saving data 5 / 29 5. What will be the output of the following code?int[] numbers = { 1, 2, 3, 4, 5 };var query = from num in numberswhere num % 2 == 0select num;numbers[1] = 0;Console.WriteLine(query.First()); Compilation error 2 4 0 6 / 29 6. What does the Type.GetType method do? It returns the type of an object It retrieves a Type object for a specified type name It creates a new instance of a type It gets the base type of a class 7 / 29 7. Which of the following is a use case of reflection in C#? Creating user interfaces Compiling code dynamically Serializing objects Accessing metadata of assemblies 8 / 29 8. Which of the following is a correct way to handle exceptions in asynchronous methods? Using try-catch within the async method Using Task.Run with try-catch Using await without try-catch Using Task.Wait with try-catch 9 / 29 9. Which feature of C# allows the definition of methods that can be overridden in derived classes? Encapsulation Inheritance Abstraction Polymorphism 10 / 29 10. Which of the following is not a valid access modifier in C#? internal external protected private 11 / 29 11. What is the purpose of the dynamic keyword in C#? To define variables that can change type To create anonymous types To handle exceptions dynamically To enable late binding 12 / 29 12. What will be the output of the following code?Type type = typeof(string);MethodInfo method = type.GetMethod("Substring", new[] { typeof(int), typeof(int) });var result = method.Invoke("Hello, World!", new object[] { 7, 5 });Console.WriteLine(result); llo, World , Wor Hello 13 / 29 13. What is the purpose of the Monitor class in C#? To abort threads To create threads To manage thread priorities To implement critical sections 14 / 29 14. Which design pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes? Builder Decorator Prototype Abstract Factory 15 / 29 15. What will be the output of the following code?public class Test{public static void Main(string[] args){int x = 5;object y = x;y = 10;Console.WriteLine(x);}} 5 Runtime error 10 Compilation error 16 / 29 16. What is the purpose of the AsParallel method in PLINQ? To filter elements based on a condition To convert a query into sequential execution To sort a collection in parallel To convert a query into parallel execution 17 / 29 17. What is the purpose of the lock statement in C#? To prevent a thread from being aborted To create a new thread To provide a mechanism for mutual exclusion To ensure that a block of code runs only once 18 / 29 18. What does the ConfigureAwait(false) method do in an asynchronous call? It throws an exception if the task fails It ensures the continuation runs on the same thread It ensures the continuation does not run on the captured context It cancels the asynchronous task 19 / 29 19. What is the primary purpose of the async keyword in C#? To define a delegate To synchronize threads To mark a method as asynchronous To declare a thread 20 / 29 20. What will be the output of the following code?public class Singleton{private static Singleton _instance;private Singleton() { } public static Singleton Instance{get{if (_instance == null){_instance = new Singleton();}return _instance;}} public void Print(){Console.WriteLine("Singleton instance");}} public class Program{public static void Main(){Singleton.Instance.Print();}} Compilation error Runtime error NullReferenceException Singleton instance 21 / 29 21. What keyword is used to allow a derived class to extend or modify the behavior defined in the base class method? abstract new virtual override 22 / 29 22. Which of the following best describes the await keyword in C#? It creates a new task It starts a new thread It runs a task synchronously It pauses the execution of an asynchronous method until the awaited task completes 23 / 29 23. Which design pattern ensures a class has only one instance and provides a global point of access to it? Adapter Builder Factory Singleton 24 / 29 24. Which of the following is a deferred execution method in LINQ? Where() Count() ToList() First() 25 / 29 25. Which keyword is used in LINQ to create a new anonymous type? var new from select 26 / 29 26. What will be the output of the following code?public async Task<int> GetData(){await Task.Delay(1000);return 42;} public async Task PrintData(){int data = await GetData();Console.WriteLine(data);} Compilation error 42 immediately 42 after a delay Runtime error 27 / 29 27. What is the primary purpose of the using statement in C#? To include namespaces To declare constants To manage threading To ensure the correct use of IDisposable objects 28 / 29 28. Which of the following design patterns is used to convert the interface of a class into another interface that clients expect? Bridge Facade Adapter Composite 29 / 29 29. What will be the output of the following code?public class Program{public static void Main(){Thread t = new Thread(Print);t.Start();t.Join();Console.WriteLine("Main thread");}public static void Print(){Thread.Sleep(1000);Console.WriteLine("Worker thread");}} Worker threadnMain thread Main thread Worker thread Main threadnWorker thread Your score is 0%
