Variables and Constants in C Sharp MCQ question and answer with solution

1

Which keyword is used to declare a constant in C#?

A) static B) const C) volatile D) None of the above

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Answer & Solution

Answer: Option B

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2

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

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

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Answer & Solution

Answer: Option C

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3

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

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

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Answer & Solution

Answer: Option D

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4

Which of the following is NOT a valid variable name in C#?

A) 1variable B) _variable C) variable1 D) Variable

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Answer & Solution

Answer: Option A

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5

What is the scope of a local variable in C#?

A) Limited to the file in which it is declared B) Limited to the class in which it is declared C) Limited to the method in which it is declared D) Limited to the block in which it is declared

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Answer & Solution

Answer: Option D

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6

Which data type is used to store whole numbers in C#?

A) float B) double C) int D) char

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Answer & Solution

Answer: Option C

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7

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

A) To make a variable constant B) To make a variable accessible outside its class C) To make a variable read-only D) To make a variable static

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Answer & Solution

Answer: Option C

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8

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

A) var str; B) string str; C) string = str; D) None of the above

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Answer & Solution

Answer: Option B

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9

In C#, which keyword is used to declare a variable that can hold values of any data type?

A) var B) dynamic C) any D) object

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Answer & Solution

Answer: Option B

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10

What is the purpose of a variable in C#?

A) To handle exceptions B) To define a method C) To store and manipulate data D) To define a constant

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Answer & Solution

Answer: Option C

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Variables and Constants in C Sharp MCQ question and answer with solution | C# Program MCQs