Storage Class - C Programming MCQ Questions and Answers

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In which storage class are variables allocated memory in the data segment of the program's memory?

A) auto B) extern C) static D) register

Discuss

Answer & Solution

Answer: Option C

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

Which storage class can only be used for local variables?

A) register B) static C) extern D) auto

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Answer & Solution

Answer: Option A

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

What storage class is typically used for function definitions in header files?

A) extern B) static C) auto D) register

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Answer & Solution

Answer: Option A

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What happens when you declare a variable with the 'extern' storage class in a C source file?

A) It becomes a global variable B) It becomes a constant C) It cannot be accessed by other files D) It becomes a local variable

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Answer & Solution

Answer: Option A

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In which storage class is a variable's memory allocated on the stack?

A) auto B) extern C) register D) static

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Answer & Solution

Answer: Option A

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Which storage class can help improve execution speed by allowing variables to be stored in CPU registers?

A) static B) extern C) auto D) register

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Answer & Solution

Answer: Option D

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What is the storage duration of a variable with 'static' storage class?

A) Automatic B) Register C) External D) Static

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Answer & Solution

Answer: Option D

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What is the default value of an uninitialized 'static' variable in C?

A) Zero B) Undefined C) Garbage value D) one

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Answer & Solution

Answer: Option A

Solution:

The default value of an uninitialized 'static' variable in C is zero. Unlike automatic variables (which have an undefined value), static variables are automatically initialized to zero if no explicit initialization is provided.

In which storage class are variables typically stored in the heap memory?

A) static B) extern C) auto D) register

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Answer & Solution

Answer: Option C

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

What is the main purpose of the 'volatile' storage class in C?

A) Prevents memory allocation B) Forces a variable to be stored in registers C) Indicates that a variable may change unexpectedly D) Increases variable scope

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Answer & Solution

Answer: Option C

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