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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 not a storage class in C?

private

static

auto

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

struct

alias

typedef

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

final

extern

static

const

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

Interface

Class

Function

Object

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

/, *, -, +

+, -, *, /

*, +, /, -

*, /, +, -

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

-128 to 127

0 to 127

1 to 255

0 to 255

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

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

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

char name[20];

char name(20);

string name[20];

str name;

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

Depends on the compiler

11. What does the keyword extern indicate?

A variable with garbage value

A local variable

A private variable

A variable defined elsewhere

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

It initializes a variable

It sends 0 to the compiler

It returns success to the operating system

It stops the program

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

int

char

float

short

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

printf()

exit()

malloc()

scanf()

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

Angle brackets

Brackets []

Curly braces {}

Parentheses ()

16. What does getch() function do?

Compares characters

Reads a single character without echoing

Terminates the program

Prints a character

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

string.h

stdlib.h

stdio.h

conio.h

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

strlength()

sizeof()

length()

strlen()

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

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

Array

Function

Constant

Variable

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

static

const int

constant

#define

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

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

'A'

"A"

24. Which of these is a bitwise operator?

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

true

false

Page 2 of 2

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

strcpy()

strcat()

stradd()

append()

27. Which format specifier is used for double values?

%lf

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

string.h

math.h

stdio.h

stdlib.h

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

/* */

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

strcpy()

strcopy()

copystr()

assign()

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

NULL

Garbage value

32. Which operator has the highest precedence?

()

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

stop()

terminate()

exit()

end()

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

condition ? if : else

if (condition) then else

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

if ? then : else

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

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

for

continue

break

switch

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

function myFunction()

void myFunction();

func myFunction()

def myFunction()

38. What is a pointer?

A keyword

A variable that stores an address

A compiler error

A data type

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

const

macro

#define

define

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

int p = NULL;

int *p = NULL;

int *p = 0;

Both A and B

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

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

object

struct

typedef

define

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

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

for

do-while

while

select

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

declare fun()

function fun()

void fun()

int = fun()

46. What does the keyword static do?

Allows modification

Makes a variable global

Preserves the value of a variable between function calls

Frees memory

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

static

extern

volatile

loop

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

scanf

while

printf

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

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