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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 keyword is used to define a structure in C?

typedef

struct

define

object

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

alias

typedef

struct

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

malloc()

scanf()

printf()

exit()

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

Depends on the compiler

5. What is a pointer?

A compiler error

A data type

A keyword

A variable that stores an address

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

const

extern

static

final

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

int

char

short

float

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

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

10. Which operator has the highest precedence?

()

11. Which of these is a bitwise operator?

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

int *p = NULL;

int p = NULL;

Both A and B

int *p = 0;

13. What does the keyword static do?

Preserves the value of a variable between function calls

Makes a variable global

Allows modification

Frees memory

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

string name[20];

char name(20);

str name;

char name[20];

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

conio.h

stdlib.h

string.h

stdio.h

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

stdio.h

math.h

string.h

stdlib.h

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

strlen()

length()

strlength()

sizeof()

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

NULL

Garbage value

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

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

while

do-while

for

select

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

continue

break

switch

for

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

auto

static

private

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

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

true

false

25. What does getch() function do?

Terminates the program

Compares characters

Prints a character

Reads a single character without echoing

Page 2 of 2

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

volatile

loop

static

extern

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

*, +, /, -

/, *, -, +

*, /, +, -

+, -, *, /

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

29. What does the keyword extern indicate?

A private variable

A variable with garbage value

A variable defined elsewhere

A local variable

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

'A'

"A"

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

void fun()

declare fun()

int = fun()

function fun()

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

append()

strcat()

stradd()

strcpy()

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

It initializes a variable

It stops the program

It sends 0 to the compiler

It returns success to the operating system

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

scanf

while

printf

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

-128 to 127

0 to 255

0 to 127

1 to 255

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

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

stop()

terminate()

end()

exit()

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

#define

macro

define

const

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

Interface

Class

Object

Function

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

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

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

/* */

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

Function

Variable

Constant

Array

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

def myFunction()

func myFunction()

function myFunction()

void myFunction();

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

copystr()

assign()

strcpy()

strcopy()

46. Which format specifier is used for double values?

%lf

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

Angle brackets

Parentheses ()

Curly braces {}

Brackets []

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

constant

#define

const int

static

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

if ? then : else

if (condition) then else

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

condition ? if : else

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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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