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

/* */

2. What does getch() function do?

Prints a character

Compares characters

Reads a single character without echoing

Terminates the program

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

strcopy()

copystr()

assign()

strcpy()

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

*, /, +, -

/, *, -, +

*, +, /, -

+, -, *, /

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

struct

alias

typedef

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

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

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

length()

sizeof()

strlength()

strlen()

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

printf

while

scanf

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

malloc()

printf()

scanf()

exit()

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

Function

Class

Object

Interface

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

It stops the program

It sends 0 to the compiler

It initializes a variable

It returns success to the operating system

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

define

object

typedef

struct

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

15. Which operator has the highest precedence?

()

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

while

select

for

do-while

17. 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

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

declare fun()

void fun()

function fun()

int = fun()

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

char name(20);

char name[20];

string name[20];

str name;

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

Garbage value

NULL

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

static

const int

#define

constant

22. What does the keyword extern indicate?

A local variable

A variable defined elsewhere

A variable with garbage value

A private variable

23. What is a pointer?

A data type

A compiler error

A variable that stores an address

A keyword

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

false

true

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

Page 2 of 2

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

27. Which format specifier is used for double values?

%lf

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

end()

terminate()

exit()

stop()

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

extern

loop

static

volatile

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

stdlib.h

math.h

string.h

stdio.h

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

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

Both A and B

int p = NULL;

int *p = NULL;

int *p = 0;

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

0 to 255

0 to 127

1 to 255

-128 to 127

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

func myFunction()

function myFunction()

def myFunction()

void myFunction();

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

static

auto

private

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

conio.h

string.h

stdlib.h

stdio.h

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

Depends on the compiler

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

break

continue

switch

for

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

Curly braces {}

Angle brackets

Brackets []

Parentheses ()

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

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

short

float

char

int

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

macro

const

define

#define

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

Function

Constant

Array

Variable

44. What does the keyword static do?

Makes a variable global

Frees memory

Allows modification

Preserves the value of a variable between function calls

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

extern

const

final

static

46. Which of these is a bitwise operator?

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

"A"

'A'

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

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

append()

strcat()

stradd()

strcpy()

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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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