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Computer Elements of “C” Test Online

Mustansar KhanLast Updated: October 15, 2025

Start your preparation for Computer Elements of “C” Test Online. This online test contains important MCQs from past papers. Attempting this test will help you prepare for Annual Exams and Entry Tests. Read the questions carefully and select the correct option below to see your result.

Important Computer Elements of “C” Question and Answer

Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Elements of “C” Practice Test Online With Explanation

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Page 1 of 2

1. Which of these is a bitwise operator?

2. Which of the following function declarations is valid in C?

declare fun()

int = fun()

function fun()

void fun()

3. Which of the following is a fundamental element of a C program?

Interface

Class

Function

Object

4. Which of the following is used to store a group of related values?

Array

Function

Constant

Variable

5. Which operator is used to access the value stored at an address?

6. What is the correct syntax for a ternary operator in C?

if (condition) then else

condition ? if : else

(condition) ? (true value) : (false value)

if ? then : else

7. What is the function of return 0; in main()?

It stops the program

It returns success to the operating system

It sends 0 to the compiler

It initializes a variable

8. Which function is used to find the length of a string?

length()

strlen()

strlength()

sizeof()

9. Which of the following is used to define a block of code in C?

Curly braces {}

Parentheses ()

Brackets []

Angle brackets

10. Which of these is a decision-making structure in C?

printf

while

scanf

11. Which of the following is the correct syntax to declare a string?

string name[20];

str name;

char name(20);

char name[20];

12. What is the output of printf("%d", 3 == 3);?

true

false

13. Which of the following is used to create a multi-line comment in C?

/* */

14. Which operator is used to increment a value by 1?

15. Which header file includes the strlen() function?

stdio.h

string.h

math.h

stdlib.h

16. Which of the following is not a looping structure in C?

while

select

do-while

for

17. What does the keyword static do?

Preserves the value of a variable between function calls

Makes a variable global

Frees memory

Allows modification

18. Which of these is not a storage class in C?

auto

private

static

19. What is a pointer?

A compiler error

A data type

A keyword

A variable that stores an address

20. What will the statement int a = 10, b = 3; printf("%d", a % b); print?

21. Which of the following is the correct order of evaluation?

*, +, /, -

/, *, -, +

+, -, *, /

*, /, +, -

22. Which of the following is not a keyword in C?

extern

static

volatile

loop

23. Which keyword is used to define a user-defined data type alias?

typedef

alias

struct

24. Which operator is used to compare if two values are not equal?

25. Which of the following is used for dynamic memory allocation?

scanf()

exit()

printf()

malloc()

Page 2 of 2

26. What is the default value of a global variable in C?

NULL

Garbage value

27. Which data type can be used to store a decimal number?

int

float

short

char

28. What will be the output of sizeof(char) on most systems?

29. Which is the correct declaration of a function in C?

void myFunction();

function myFunction()

func myFunction()

def myFunction()

30. Which of the following is a valid arithmetic operator in C?

31. What does the keyword extern indicate?

A variable with garbage value

A private variable

A local variable

A variable defined elsewhere

32. Which of the following can be used to copy strings in C?

strcopy()

strcpy()

assign()

copystr()

33. What is the correct way to initialize a pointer to NULL?

int *p = NULL;

int *p = 0;

Both A and B

int p = NULL;

34. What does getch() function do?

Reads a single character without echoing

Compares characters

Prints a character

Terminates the program

35. Which of the following is a valid character constant in C?

'A'

"A"

36. What is the output of: printf("%d", sizeof(5.5));?

Depends on the compiler

37. Which operator has the highest precedence?

()

38. Which keyword is used to define a structure in C?

struct

object

define

typedef

39. Which format specifier is used for double values?

%lf

40. Which of the following functions is used to concatenate two strings?

strcpy()

append()

strcat()

stradd()

41. What is the range of values for a char in C?

0 to 127

-128 to 127

1 to 255

0 to 255

42. What is the keyword used to define a macro?

#define

define

const

macro

43. Which of the following is used to terminate a C program?

terminate()

exit()

stop()

end()

44. Which of the following is used to define a symbolic constant in C?

const int

static

constant

#define

45. Which of the following is a compound assignment operator?

46. Which of the following is an example of a looping construct?

switch

continue

break

for

47. Which symbol is used to begin a preprocessor directive?

48. Which library must be included to use malloc()?

stdlib.h

conio.h

stdio.h

string.h

49. Which keyword is used to prevent a variable from being modified?

static

extern

const

final

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Mustansar KhanLast Updated: October 15, 2025

Important Computer Elements of “C” Question and Answer

Elements of “C” Practice Test Online With Explanation

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