Computer Getting Started with “C” Test Online

Mustansar KhanLast Updated: October 15, 2025

Important Computer Getting Started with “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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Getting Started with “C” Practice Test Online With Explanation

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1. Which header file is needed to use printf() and scanf()?

conio.h

stdio.h

stdlib.h

math.h

2. Which format specifier is used for float values in C?

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

value_2

2value

@count

float

4. Which of the following is a correct function prototype?

func int();

declare func();

int func;

int func();

5. Which of the following is a correct extension for a C source file?

.java

.cpp

.py

6. Which keyword is used to exit a loop early?

exit

stop

break

return

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

function

define

No keyword needed

func

8. Which of the following is a valid data type in C?

num

int

number

integer

9. What is the use of the continue statement in loops?

Restart the loop

End the program

Exit the loop

Skip the current iteration

10. Which operator is used to dereference a pointer?

11. Which of the following is a relational operator?

12. Which of the following is used to take input from the user?

print()

echo()

scanf()

puts()

13. Which of the following data types can store real numbers?

char

int

long

float

14. Which header file is used for mathematical functions like sqrt()?

conio.h

math.h

stdlib.h

string.h

15. Which of the following is the correct syntax to define an array?

int arr[] = new int[10];

int arr[10];

array int arr[10];

int arr(10);

16. Which symbol is used for the address-of operator in C?

17. What is the result of 5 % 2 in C?

2.5

18. What is the correct way to declare a pointer in C?

int ptr;

pointer int ptr;

int &ptr;

int *ptr;

19. Which of the following is used for string handling in C?

math.h

string.h

stdlib.h

conio.h

20. Which of the following functions is the entry point of a C program?

start()

begin()

init()

main()

21. What is the size of an int in C (typically on 32-bit systems)?

1 byte

8 bytes

2 bytes

4 bytes

22. What is a syntax error?

Mistake in program structure

Error after compilation

Error in logic

Run-time error

23. Which symbol is used for comments in C?

// or /* */

24. Which of the following is not a valid C keyword?

return

static

mutable

auto

25. What does the keyword void indicate when used in a function?

The function returns no value

The function has no parameters

The function is private

The function returns a number

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26. What is the output of printf("%c", 65);?

Error

27. What will the expression 10 / 3 return in C?

3.0

3.33

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

new

define

typedef

struct

29. Which format specifier is used to print characters in C?

30. Which library function is used to calculate power in C?

exp()

sqrt()

power()

pow()

31. Which keyword is used to create a constant in C?

static

constant

const

define

32. What is the default return type of main() in C?

int

void

char

float

33. Which of the following loops executes at least once?

None

for

while

do-while

34. What does the return statement do in a function?

Ends the program

Prints a message

Returns control to the caller

Loops the function

35. Which of the following operators is used to increment a variable by 1?

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

37. How do you include the standard I/O header in a C program?

using stdio.h

include stdio

#include

#import stdio.h

38. Which function is used to read a single character from the user?

getc()

getchar()

read()

input()

39. Which escape sequence is used to insert a new line in C?

40. What is the correct syntax to output "Hello World" in C?

print("Hello World");

cout << "Hello World";

echo("Hello World");

printf("Hello World");

41. Which of these is a looping statement in C?

break

switch

while

42. Which data type is used to store a single character?

int

float

string

char

43. What will printf("%d", 10 + 20); output?

Error

1020

10 + 20

44. Which operator is used for assignment in C?

45. Which symbol is used to indicate the end of a statement in C?

;

46. How do you declare a variable in C?

var x;

int x;

variable x;

declare x;

47. Which character is used to terminate a string in C?

NULL

48. What is the result of sizeof(char) on most systems?

49. Which of the following is used to declare a constant in C?

static

#define

Both A and B

const

50. Which operator is used to compare two values for equality?

equals

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Mustansar KhanLast Updated: October 15, 2025

Important Computer Getting Started with “C” Question and Answer

Getting Started with “C” Practice Test Online With Explanation

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