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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.
Test Helpful For:	ECAT Entry Test Computer Online Test Interview Questions about Computer All Universities Entrance Test Recruitments Tests

Elements of “C” Practice Test Online With Explanation

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Page 1 of 2

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

stdio.h

stdlib.h

string.h

conio.h

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

alias

typedef

struct

3. Which of these is a bitwise operator?

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

condition ? if : else

if ? then : else

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

if (condition) then else

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

#define

macro

define

const

6. What is a pointer?

A data type

A variable that stores an address

A compiler error

A keyword

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

Array

Function

Variable

Constant

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

9. What does the keyword extern indicate?

A private variable

A variable defined elsewhere

A variable with garbage value

A local variable

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

sizeof()

strlength()

length()

strlen()

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

char name[20];

string name[20];

str name;

char name(20);

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

strcpy()

append()

stradd()

strcat()

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

'A'

"A"

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

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

0 to 127

0 to 255

-128 to 127

1 to 255

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

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

/* */

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

19. What does the keyword static do?

Allows modification

Makes a variable global

Frees memory

Preserves the value of a variable between function calls

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

volatile

extern

loop

static

21. What does getch() function do?

Prints a character

Reads a single character without echoing

Terminates the program

Compares characters

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

/, *, -, +

*, +, /, -

+, -, *, /

*, /, +, -

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

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

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

def myFunction()

func myFunction()

void myFunction();

function myFunction()

Page 2 of 2

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

object

struct

define

typedef

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

Interface

Class

Function

Object

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

float

char

int

short

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

declare fun()

int = fun()

function fun()

void fun()

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

final

extern

const

static

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

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

auto

private

static

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

string.h

math.h

stdio.h

stdlib.h

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

continue

switch

break

for

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

for

do-while

select

while

36. 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

37. Which operator has the highest precedence?

()

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

while

scanf

printf

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

Depends on the compiler

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

int *p = 0;

Both A and B

int p = NULL;

int *p = NULL;

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

NULL

Garbage value

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

#define

constant

const int

static

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

end()

terminate()

exit()

stop()

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

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

assign()

strcpy()

strcopy()

copystr()

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

exit()

printf()

malloc()

scanf()

47. Which format specifier is used for double values?

%lf

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

Angle brackets

Parentheses ()

Curly braces {}

Brackets []

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

false

true

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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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