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