Storage Class MCQs with Explanations

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.

A storage class defines the scope (visibility) and life-time of variables and/or functions within a C Program. These specifiers precede the type that they modify. There are the following storage classes, which can be used in a C Program auto register static extern

Auto is a automatic storage class. The purpose of auto is it indicates that a variable’s memory will automatically be preserved.

extern is the correct answer to “What is the default storage class for global variables”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “Which storage class is used for local variables”. This question is standard in competitive examination syllabi for Storage Class.

Preserve value is the correct answer to “What is the primary purpose of the 'static' storage class”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “Which storage class specifies automatic storage duration”. This question is standard in competitive examination syllabi for Storage Class.

For function args is the correct answer to “When does a 'register' storage class make sense to use”. This question is standard in competitive examination syllabi for Storage Class.

External linkage is the correct answer to “What is the significance of the 'extern' storage class”. This question is standard in competitive examination syllabi for Storage Class.

static is the correct answer to “Which storage class allocates memory and retains its value between function calls”. This question is standard in competitive examination syllabi for Storage Class.

File scope is the correct answer to “What is the maximum scope of a variable with 'static' storage class”. This question is standard in competitive examination syllabi for Storage Class.

Automatic is the correct answer to “What is the storage duration of a variable with 'auto' storage class”. This question is standard in competitive examination syllabi for Storage Class.

static is the correct answer to “In which storage class is the variable's storage duration throughout the program's execution”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “Which storage class is used for function arguments by default”. This question is standard in competitive examination syllabi for Storage Class.

Faster access is the correct answer to “What is the primary advantage of using 'register' storage class for variables”. This question is standard in competitive examination syllabi for Storage Class.

extern is the correct answer to “What storage class should be used for a variable that needs to be shared across multiple source files”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “In which storage class is the variable's storage duration limited to the function where it's declared”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “Which storage class is often used for variables with block scope within functions”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “What storage class is used for function parameters in C by default”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “Which storage class is used to define variables that are not initialized to any default value”. This question is standard in competitive examination syllabi for Storage Class.

During compile time is the correct answer to “When is memory allocated for a 'static' variable in C”. This question is standard in competitive examination syllabi for Storage Class.

register is the correct answer to “Which storage class should be used for a variable that should be accessed quickly and frequently”. This question is standard in competitive examination syllabi for Storage Class.

Storage duration is the correct answer to “What is the primary difference between 'auto' and 'register' storage classes”. This question is standard in competitive examination syllabi for Storage Class.

static is the correct answer to “In which storage class are variables allocated memory in the data segment of the program's memory”. This question is standard in competitive examination syllabi for Storage Class.

register is the correct answer to “Which storage class can only be used for local variables”. This question is standard in competitive examination syllabi for Storage Class.

extern is the correct answer to “What storage class is typically used for function definitions in header files”. This question is standard in competitive examination syllabi for Storage Class.

It becomes a global variable is the correct answer to “What happens when you declare a variable with the 'extern' storage class in a C source file”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “In which storage class is a variable's memory allocated on the stack”. This question is standard in competitive examination syllabi for Storage Class.

register is the correct answer to “Which storage class can help improve execution speed by allowing variables to be stored in CPU registers”. This question is standard in competitive examination syllabi for Storage Class.

Static is the correct answer to “What is the storage duration of a variable with 'static' storage class”. This question is standard in competitive examination syllabi for Storage Class.

auto is the correct answer to “In which storage class are variables typically stored in the heap memory”. This question is standard in competitive examination syllabi for Storage Class.

Indicates that a variable may change unexpectedly is the correct answer to “What is the main purpose of the 'volatile' storage class in C”. This question is standard in competitive examination syllabi for Storage Class.

A, B and C is the correct answer to “The storage class controls”. This question is standard in competitive examination syllabi for Storage Class.

The global variable is referenced via the extern specifier. is the correct answer to “How is a variable accessed from another file”. This question is standard in competitive examination syllabi for Storage Class.