41. In C#, what is the keyword used to prevent a class from being inherited? A. static B. final C. private D. sealed Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
42. What is the output of the following code: Console.WriteLine("Hello" + 2 + 3); A. Hello23 B. Hello5 C. Hello D. 23 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
43. Which of the following is NOT a valid C# primitive data type? A. long B. byte C. boolean D. char Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
44. What is the correct syntax to declare a nullable type in C#? A. nullable int B. int nullable C. int? nullableInt D. nullable Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
45. In C#, what is the purpose of the 'base' keyword? A. Declares a base method B. Refers to the base class C. Specifies the base address D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
46. What is the purpose of the 'readonly' keyword in C#? A. Marks a method as read-only B. Allows read access only C. Indicates that a field can only be assigned once D. Specifies a constant value Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
47. Which of the following is NOT a valid access modifier in C#? A. protected internal B. public static C. private D. internal Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
48. In C#, what is the role of the 'using' statement? A. To define classes B. To import libraries C. To handle exceptions D. To include namespaces Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
49. What is the correct syntax to declare an array of strings in C#? A. string[] array B. array C. string array[] D. string array Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
50. Which of the following is NOT a valid way to instantiate a string in C#? A. string str; B. string str = "Hello"; C. string str = ""; D. string str = new string(); Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
