Basic Syntax and Data Types in C Sharp MCQ question and answer with solution

1

Which of the following is NOT a valid C# data type?

A) int B) string C) double D) character

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Answer & Solution

Answer: Option D

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2

What symbol is used to end a statement in C#?

A) ; B) : C) . D) ,

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Answer & Solution

Answer: Option A

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3

What is the correct syntax to declare a variable in C#?

A) num = int; B) var num; C) num int; D) int num;

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Answer & Solution

Answer: Option D

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4

What is the purpose of the 'var' keyword in C#?

A) Declares a constant B) Converts a variable to string C) Implicitly declares a variable D) Defines a method

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Answer & Solution

Answer: Option C

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5

Which of the following is a valid identifier in C#?

A) $variable B) myVariable C) #variable D) None of the above

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Answer & Solution

Answer: Option B

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6

What is the correct way to comment a single line in C#?

A) -- This is a comment B) # This is a comment C) // This is a comment D) /* This is a comment */

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Answer & Solution

Answer: Option C

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7

What is the default value of an integer variable in C# if not explicitly initialized?

A) 1 B) null C) -1 D) 0

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Answer & Solution

Answer: Option D

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8

Which of the following is a valid C# statement?

A) Console.WriteLine("Hello, World!"); B) print("Hello, World!"); C) System.out.println("Hello, World!"); D) echo "Hello, World!";

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Answer: Option A

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9

What is the correct syntax to declare a constant in C#?

A) constant MAX_VALUE = 100; B) MAX_VALUE = 100; C) int MAX_VALUE = 100; D) const int MAX_VALUE = 100;

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Answer & Solution

Answer: Option D

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10

What does the 'using' directive do in C#?

A) Defines classes B) Declares variables C) Imports namespaces D) Handles exceptions

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Answer & Solution

Answer: Option C

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Basic Syntax and Data Types in C Sharp MCQ question and answer with solution | C# Program MCQs