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