Storage Class - C Programming MCQ Questions and Answers

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Which storage class is used for function arguments by default?

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

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Answer & Solution

Answer: Option B

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What is the primary advantage of using 'register' storage class for variables?

A) Larger scope B) Faster access C) Longer duration D) Automatic alloc.

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Answer & Solution

Answer: Option B

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What storage class should be used for a variable that needs to be shared across multiple source files?

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

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Answer & Solution

Answer: Option C

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In which storage class is the variable's storage duration limited to the function where it's declared?

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

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Answer & Solution

Answer: Option C

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Which storage class is often used for variables with block scope within functions?

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

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Answer & Solution

Answer: Option C

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What storage class is used for function parameters in C by default?

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

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Answer & Solution

Answer: Option B

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Which storage class is used to define variables that are not initialized to any default value?

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

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Answer & Solution

Answer: Option A

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When is memory allocated for a 'static' variable in C?

A) During compile time B) During runtime C) During function call D) During program termination

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Answer & Solution

Answer: Option A

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Which storage class should be used for a variable that should be accessed quickly and frequently?

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

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Answer & Solution

Answer: Option C

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What is the primary difference between 'auto' and 'register' storage classes?

A) Scope B) Initialization C) Memory allocation D) Storage duration

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Answer & Solution

Answer: Option D

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