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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 of the following is the correct order of evaluation?

+, -, *, /

/, *, -, +

*, +, /, -

*, /, +, -

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

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

"A"

'A'

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

false

true

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

int

char

float

short

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

Function

Interface

Object

Class

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

declare fun()

int = fun()

function fun()

void fun()

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

9. Which operator has the highest precedence?

()

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

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

Depends on the compiler

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

final

const

extern

static

13. What is a pointer?

A variable that stores an address

A data type

A compiler error

A keyword

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

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

Array

Constant

Function

Variable

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

conio.h

stdio.h

string.h

stdlib.h

17. What does the keyword static do?

Allows modification

Preserves the value of a variable between function calls

Makes a variable global

Frees memory

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

0 to 127

0 to 255

-128 to 127

1 to 255

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

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

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

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

scanf

printf

while

23. What does the keyword extern indicate?

A variable defined elsewhere

A private variable

A variable with garbage value

A local variable

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

NULL

Garbage value

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

do-while

while

for

select

Page 2 of 2

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

char name[20];

char name(20);

string name[20];

str name;

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

stop()

end()

terminate()

exit()

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

static

constant

#define

const int

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

static

loop

volatile

extern

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

typedef

struct

alias

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

define

const

macro

#define

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

It sends 0 to the compiler

It returns success to the operating system

It initializes a variable

It stops the program

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

auto

static

private

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

strcat()

stradd()

append()

strcpy()

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

exit()

malloc()

scanf()

printf()

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

int *p = 0;

Both A and B

int *p = NULL;

int p = NULL;

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

void myFunction();

function myFunction()

def myFunction()

func myFunction()

38. What does getch() function do?

Reads a single character without echoing

Prints a character

Terminates the program

Compares characters

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

/* */

40. Which of these is a bitwise operator?

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

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

typedef

struct

object

define

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

assign()

strcpy()

copystr()

strcopy()

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

for

break

continue

switch

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

condition ? if : else

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

if ? then : else

if (condition) then else

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

stdio.h

stdlib.h

math.h

string.h

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?

Brackets []

Angle brackets

Parentheses ()

Curly braces {}

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

sizeof()

strlength()

strlen()

length()

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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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