Storage Class - C Programming MCQ Questions and Answers Page-3 section-1

21.
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

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22.
Which storage class can only be used for local variables?

A. register

B. static

C. extern

D. auto

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23.
What storage class is typically used for function definitions in header files?

A. extern

B. static

C. auto

D. register

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24.
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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25.
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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26.
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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27.
What is the storage duration of a variable with 'static' storage class?

A. Automatic

B. Register

C. External

D. Static

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28.
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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29.
In which storage class are variables typically stored in the heap memory?

A. static

B. extern

C. auto

D. register

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30.
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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Storage Class - C Programming MCQ Questions and Answers

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

Answer & Solution

22. Which storage class can only be used for local variables?

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

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

Answer & Solution

21.
In which storage class are variables allocated memory in the data segment of the program's memory?

22.
Which storage class can only be used for local variables?

23.
What storage class is typically used for function definitions in header files?

24.
What happens when you declare a variable with the 'extern' storage class in a C source file?

25.
In which storage class is a variable's memory allocated on the stack?

26.
Which storage class can help improve execution speed by allowing variables to be stored in CPU registers?

27.
What is the storage duration of a variable with 'static' storage class?

28.
What is the default value of an uninitialized 'static' variable in C?

29.
In which storage class are variables typically stored in the heap memory?

30.
What is the main purpose of the 'volatile' storage class in C?