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

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Current Affairs Interview Blog

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

A) String str = "Hello"; B) var str = "Hello"; C) string str = "Hello"; D) str = string("Hello");

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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

A) To make a variable constant B) To specify a data type that can change during runtime C) To make a variable accessible outside its class D) To specify a data type to be determined at runtime

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Answer & Solution

Answer: Option D

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In C#, what is the default value of a boolean variable if not initialized explicitly?

A) FALSE B) TRUE C) 0 D) null

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Answer & Solution

Answer: Option A

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What is the correct way to declare a variable without assigning a value in C#?

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

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Answer & Solution

Answer: Option D

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Which of the following is a valid constant name in C#?

A) my-constant B) 123constant C) MAX_VALUE D) _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