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

Depends on the compiler

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

function myFunction()

void myFunction();

def myFunction()

func myFunction()

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

switch

continue

for

break

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

5. What does the keyword extern indicate?

A local variable

A variable defined elsewhere

A private variable

A variable with garbage value

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

select

while

do-while

for

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

stop()

terminate()

exit()

end()

8. What does getch() function do?

Prints a character

Reads a single character without echoing

Compares characters

Terminates the program

9. Which of these is a bitwise operator?

10. Which operator has the highest precedence?

()

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

str name;

string name[20];

char name(20);

char name[20];

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

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

It sends 0 to the compiler

It stops the program

It returns success to the operating system

It initializes a variable

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

static

private

auto

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

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

macro

const

#define

define

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

printf()

exit()

scanf()

malloc()

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

false

true

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

static

final

const

extern

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

declare fun()

function fun()

int = fun()

void fun()

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

Garbage value

NULL

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

struct

typedef

alias

23. Which format specifier is used for double values?

%lf

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

"A"

'A'

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

-128 to 127

0 to 127

0 to 255

1 to 255

Page 2 of 2

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

Function

Array

Variable

Constant

27. What is a pointer?

A compiler error

A variable that stores an address

A keyword

A data type

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

string.h

conio.h

stdlib.h

stdio.h

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

volatile

loop

extern

static

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

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

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

strcpy()

strcat()

append()

stradd()

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

object

define

struct

typedef

34. What does the keyword static do?

Preserves the value of a variable between function calls

Allows modification

Frees memory

Makes a variable global

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

strcopy()

copystr()

assign()

strcpy()

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

condition ? if : else

if ? then : else

if (condition) then else

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

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

short

int

float

char

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

Parentheses ()

Brackets []

Angle brackets

Curly braces {}

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

stdlib.h

stdio.h

string.h

math.h

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

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

while

printf

scanf

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

/* */

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

/, *, -, +

*, +, /, -

*, /, +, -

+, -, *, /

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

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

#define

const int

constant

static

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

length()

sizeof()

strlen()

strlength()

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

Both A and B

int *p = 0;

int p = NULL;

int *p = NULL;

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

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

Function

Object

Interface

Class

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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

Study Plan for Computer Elements of “C” Test Online

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