Explore topic-wise MCQs in C.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your C knowledge and support exam preparation. Choose a topic below to get started.

1.

Which header file should be included if a function has to be defined such that it can accept variable number of arguments?

A. stdlib.h
B. stdarg.h
C. assert.h
D. setjmp.h
Answer» C. assert.h
Discussion
2.

What is the role of the given C function?

A. allows a function with variable arguments which used the va_start macro to return
B. retrieves the next argument in the parameter list
C. initializes ap variable to be used with the va_arg and va_start macros
D. returns the next additional argument as an expressionView Answer
Answer» B. retrieves the next argument in the parameter list
Discussion
3.

Which macro retrieves the next argument in the parameter list of the function with type type?

A. type va_arg(va_list ap, type)
B. type var_arg(va_list ap, type)
C. type v_arg(va_list ap, type)
D. type val_arg(va_list ap, typ
E. type var_arg(va_list ap, type)c) type v_arg(va_list ap, type)d) type val_arg(va_list ap, type)
Answer» B. type var_arg(va_list ap, type)
Discussion
4.

ALLOWS_A_FUNCTION_WITH_VARIABLE_ARGUMENTS_WHICH_USED_THE_VA_START_MACRO_TO_RETURN?$

A. retrieves the next argument in the parameter list
B. initializes ap variable to be used with the va_arg and va_start macros
C. returns the next additional argument as an expression
Answer» C. returns the next additional argument as an expression
Discussion
5.

The C library macro type _________ retrieves the next argument in the parameter list of the function with type.

A. va_end
B. va_arg
C. va_start
D. no macros
Answer» C. va_start
Discussion
6.

______ macro must be called before using ______ and ________

A. va_arg, va_end and va_start
B. va_start, va_end and va_arg
C. va_end, va_arg and va_start
D. v_arg, v_end and v_start
Answer» C. va_end, va_arg and va_start
Discussion
7.

The _______ macro shall be invoked before any access to the unnamed arguments.

A. va_arg
B. va_end
C. va_list
D. va_start
Answer» E.
Discussion
8.

Which macro retrieves the next argument in the parameter list of the function with type type?

A. type va_arg(va_list ap, type)
B. type var_arg(va_list ap, type)
C. type v_arg(va_list ap, type)
D. type val_arg(va_list ap, type)
Answer» B. type var_arg(va_list ap, type)
Discussion
9.

If access to the varying arguments is desired then the called function shall declare ________ having type va_list.

A. class
B. object
C. function
D. variable
Answer» C. function
Discussion
10.

The three macros defined by stdarg.h is _________

A. start(), arg() and end()
B. var_start(), var_arg() and var_end()
C. va_start(), va_arg() and va_end()
D. v_start(), v_arg() and v_end()
Answer» D. v_start(), v_arg() and v_end()
Discussion
11.

The header file stdarg.h defines a variable type ________

A. va_list
B. v_list
C. size_t
D. var_list
Answer» B. v_list
Discussion
12.

How many macros are defined in the header file stdarg.h?

A. one
B. two
C. three
D. four
Answer» D. four
Discussion