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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 the following functions is used to concatenate two strings?

stradd()

strcpy()

append()

strcat()

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

exit()

end()

terminate()

stop()

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

typedef

alias

struct

4. What is a pointer?

A variable that stores an address

A keyword

A data type

A compiler error

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

/* */

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

macro

const

define

#define

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

struct

define

object

typedef

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

Depends on the compiler

9. Which format specifier is used for double values?

%lf

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

if ? then : else

condition ? if : else

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

if (condition) then else

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

while

printf

scanf

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

constant

#define

static

const int

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

strcopy()

assign()

strcpy()

copystr()

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

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

auto

private

static

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

int *p = 0;

int p = NULL;

int *p = NULL;

Both A and B

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

Garbage value

NULL

18. Which operator has the highest precedence?

()

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

math.h

stdio.h

string.h

stdlib.h

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

switch

break

for

continue

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

22. What does the keyword static do?

Makes a variable global

Preserves the value of a variable between function calls

Allows modification

Frees memory

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

sizeof()

strlen()

length()

strlength()

24. What does getch() function do?

Compares characters

Terminates the program

Reads a single character without echoing

Prints a character

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

false

true

Page 2 of 2

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

malloc()

printf()

exit()

scanf()

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

"A"

'A'

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

void myFunction();

def myFunction()

func myFunction()

function myFunction()

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

0 to 255

0 to 127

1 to 255

-128 to 127

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

Angle brackets

Brackets []

Curly braces {}

Parentheses ()

31. What does the keyword extern indicate?

A variable with garbage value

A local variable

A variable defined elsewhere

A private variable

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

/, *, -, +

+, -, *, /

*, /, +, -

*, +, /, -

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

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

declare fun()

int = fun()

void fun()

function fun()

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

36. Which of these is a bitwise operator?

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

Class

Object

Function

Interface

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

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

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

select

for

while

do-while

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

Variable

Function

Array

Constant

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

static

volatile

loop

extern

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

float

short

char

int

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

char name[20];

string name[20];

str name;

char name(20);

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

conio.h

stdlib.h

string.h

stdio.h

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

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

const

static

final

extern

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

It stops the program

It returns success to the operating system

It initializes a variable

It sends 0 to the compiler

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

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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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