C Language

MCQ questions and answers

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C Language MCQ (59)

1.
C language was developed by __________.
A

Ken Thomson
B

James Gosling
C

Dennis Ritchie
D

Richard Stallman

Answer: C

2.
ANSI stands for
A

American National Standard Institute
B

Advance National Standard Institute
C

Advance National Standard information
D

American National Standard information

Answer: A

3.
Which is a compulsory function in the C programming language?
A

main()
B

init()
C

scanf()
D

printf()

Answer: A

4.
Which symbol is known as a compiler directives?
A

& (Ampersand)
B

:: (scope resolution)
C

() parenthesis
D

# (pound sign)

Answer: D

5.
In a C program the smallest individual unit is known as __________.
A

keyword
B

identifier
C

token
D

operator

Answer: C

6.
__________ has a fixed meaning in the compiler and it can not be change during an execution of the program.
A

Keyword
B

printf()
C

Library function
D

Token

Answer: A

7.
__________ is reserved word for the compiler.
A

keyword
B

variable
C

constant
D

none

Answer: A

8.
Which has a fixed value which cannot change at runtime?
A

keyword
B

operator
C

identifier
D

constant

Answer: D

9.
A string constant is a sequence of characters enclosed in a __________.
A

single quotes
B

double quotes
C

exclamation mark
D

carriage return

Answer: B

10.
a is a used for
A

linefeed
B

backspace
C

audio bell
D

tab

Answer: C

11.
Which of the following variable name is correct?
A

char
B

price#
C

stud name
D

int_no

Answer: D

12.
What is the size of an unsigned char datatype?
A

8 bit
B

16 bit
C

4 bit
D

32 bit

Answer: A

13.
What is the size of a signed short int datatype?
A

16 bit
B

32 bit
C

64 bit
D

8 bit

Answer: D

14.
What is the size of long double datatype?
A

6 Byte
B

10 Byte
C

20 Byte
D

32 Byte

Answer: B

15.
Which of the following operator has a higher priority?
A

+ (Plus)
B

– (Hypen)
C

() Parenthesis
D

&& (Logical AND)

Answer: C

16.
Which of the following format is used to read the floating point value?
A

%e
B

%f
C

%g
D

all of the above

Answer: D

17.
____ data format code is used to read an unsigned decimal integer?
A

%u
B

%g
C

%[ ]
D

%i

Answer: A

18.
%i format specifier is used to read the __________.
A

octal
B

decimal
C

hexadecimal
D

all of the above

Answer: D

19.
Which symbol is called an address operator?
A

* (Asterik)
B

& (Ampersent)
C

:: (Scope resolution)
D

; (semi coolen )

Answer: B

20.
_____ header file contains the character handling library functions?
A

ctype.h
B

stdio.h
C

string.h
D

iomanip.h

Answer: A

21.
Which statement is known as the decision-making statement?
A

goto
B

switch
C

if
D

all of the above

Answer: D

22.
____ is used to end the cases in the switch-case.
A

;(semicolon)
B

:(colon)
C

.(period)
D

, (comma)

Answer: B

23.
____ is also known as an entry controlled loop?
A

for loop
B

while loop
C

do-while loop
D

A and B

Answer: D

24.
_____ statement causes the execution of the loop to be continue with the next iteration?
A

break
B

continue
C

next
D

exit()

Answer: B

25.
Which statement will terminate the loop?
A

continue
B

break
C

case
D

jump

Answer: B

26.
Which header file includes the exit() function?
A

stdio.h
B

conio.h
C

stdlib.h
D

iomanip.h

Answer: C

27.
Array is a group of __________ datatype.
A

similar
B

dissimilar
C

random
D

object

Answer: A

28.
The array elements can be access by __________.
A

index or subscript
B

base address
C

pointer
D

none

Answer: A

29.
What is the subscript value of a base address of an array?
A

zero
B

two
C

one
D

ten

Answer: A

30.
Array is created at runtime known as__________.
A

static array
B

associative
C

dynamic array
D

none

Answer: C

31.
Which function is used to copy the one string over an another string?
A

strcat
B

strcmp
C

strcpy
D

strcopy

Answer: C

32.
Which header file is usec to access the the general utility functions?
A

stdlib.h
B

stdio.h
C

iomanip.h
D

none

Answer: A

33.
Which header file contains the string handling function?
A

stdio.h
B

string.h
C

ctype.h
D

stdlib.h

Answer: B

34.
Which function is called as an user define function?
A

printf()
B

scanf()
C

getch()
D

main()

Answer: D

35.
An organization of a large program into the small independent segment of the program such phenomena is called __________.
A

module
B

function
C

A and B are same
D

none

Answer: C

36.
Which variable is defined inside the function and it is not accessible to the outside?
A

local variable
B

global variable
C

pointer variable
D

none

Answer: A

37.
____ is a variable defined outside any function block.
A

external
B

auto
C

static
D

register

Answer: A

38.
____ variables preserve their previous value in their previous scope and are not initialized again in the new scope.
A

static
B

auto
C

register
D

extern

Answer: A

39.
Which variable is leads to the faster execution of program?
A

auto
B

static
C

extern
D

register

Answer: D

40.
C language support to the constructed datatype __________, a mechanism for packing data of different type.
A

structure
B

union
C

class
D

array

Answer: B

41.
Which operator is also known as the selection operator?
A

* (Asterik)
B

& (Ampersent)
C

?: (Conditional operator)
D

-> (Arrow operator)

Answer: D

42.
__ is used to support the dynamic memory management.
A

union
B

structure
C

pointer
D

array

Answer: C

43.
Indirection operator (*) is also called as __________.
A

reference operator
B

address operator
C

dereferencing operator
D

none

Answer: C

44.
Which is the correct syntax of a declaration of an integer pointer variable?
A

int &ptr;
B

int *ptr;
C

int (*ptr->p)++;
D

int ptr++->p*;

Answer: B

45.
Which is the correct statement to increment the p variable?
A

(*ptr->p)++
B

*ptr->p++
C

ptr++->p*
D

*ptr++->p

Answer: B

46.
Which is correct statement to initialize the pointer variable?
A

ptr=&var;
B

*ptr=&var;
C

ptr=*(&var);
D

(*ptr)=&(var);

Answer: A

47.
_____ is a named collection of related information that is recorded on secondary storage such as magnetic disks, magnetic tapes and optical disks.
A

Track
B

Sector
C

File
D

Memory cell

Answer: C

48.
Which function is used to create the new file?
A

fcreate()
B

fopen()
C

fwrite()
D

ftell()

Answer: B

49.
Which function is used to move a position of file pointer to the desired location in the file?
A

ftell()
B

rewind()
C

fseek()
D

move()

Answer: C

50.
Which function is used to write a set of data values to the file?
A

fget()
B

fput()
C

fprintf()
D

fscanf()

Answer: C

51.
Which function is used to set a position of the file pointer to beginning of the file?
A

ftell()
B

fseek()
C

fset()
D

rewind()

Answer: D

52.
Which of the following function is the integer data-oriented functions?
A

getc()
B

getw()
C

putw()
D

B and C

Answer: D

53.
_____ is a marker in the file which is used to stop the reading operation of the file.
A

zero
B

BOF
C

EOF
D

one

Answer: C

54.
__________ is a same as EOF.
A

0 (zero)
B

1 (one)
C

x
D

-1 (minus One)

Answer: D

55.
Which function is used to test an end of file?
A

feof(void)
B

EOF
C

ferror
D

feof(filepointer)

Answer: D

56.
What value is returned by fseek() function after the successful execution?
A

0 (zero)
B

null
C

1 (one)
D

-1 (minus One)

Answer: A

57.
___ function is used to allocate a block of memory dynamically.
A

malloc()
B

calloc()
C

free()
D

realloc()

Answer: A

58.
_____ allocates the requested memory and returns a pointer to it.
A

free()
B

realloc()
C

calloc()
D

malloc()

Answer: C

59.
Size of dynamically allocated memory can be changed by using ______.
A

calloc()
B

malloc()
C

realloc()
D

none

Answer: C

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