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ECAT Computer Elements of “C” Test Online

Mustansar KhanLast Updated: May 1, 2025

ECAT Computer Elements of “C” Test

ECAT Computer Science Chapter 19 Elements of “C” Online Test

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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ECAT Elements of “C” Test Online MCQs

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1. What does getch() function do?

Terminates the program

Compares characters

Prints a character

Reads a single character without echoing

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

terminate()

end()

exit()

stop()

3. 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

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

sizeof()

length()

strlength()

strlen()

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

static

final

extern

const

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

false

true

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

8. What does the keyword static do?

Frees memory

Preserves the value of a variable between function calls

Makes a variable global

Allows modification

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

exit()

scanf()

printf()

malloc()

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

Depends on the compiler

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

private

static

auto

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

Variable

Array

Function

Constant

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

str name;

char name[20];

string name[20];

char name(20);

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

static

extern

loop

volatile

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

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

/, *, -, +

*, +, /, -

*, /, +, -

+, -, *, /

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

NULL

Garbage value

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

alias

typedef

struct

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

Curly braces {}

Brackets []

Angle brackets

Parentheses ()

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

0 to 127

0 to 255

1 to 255

-128 to 127

21. Which format specifier is used for double values?

%lf

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

Both A and B

int *p = NULL;

int p = NULL;

int *p = 0;

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

"A"

'A'

24. Which of these is a bitwise operator?

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

short

float

int

char

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

break

continue

switch

for

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

const

macro

define

#define

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

if (condition) then else

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

condition ? if : else

if ? then : else

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

strcpy()

stradd()

strcat()

append()

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

/* */

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

struct

define

object

typedef

32. What is a pointer?

A compiler error

A keyword

A variable that stores an address

A data type

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

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

void myFunction();

func myFunction()

def myFunction()

function myFunction()

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

Function

Class

Object

Interface

36. Which operator has the highest precedence?

()

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

strcpy()

assign()

strcopy()

copystr()

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

stdlib.h

string.h

math.h

stdio.h

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

printf

scanf

while

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

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

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

stdlib.h

string.h

conio.h

stdio.h

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

static

constant

#define

const int

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

do-while

for

while

select

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

46. What does the keyword extern indicate?

A variable with garbage value

A variable defined elsewhere

A local variable

A private variable

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

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

function fun()

declare fun()

int = fun()

void fun()

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

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Mustansar KhanLast Updated: May 1, 2025

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ECAT Computer Elements of “C” Test Online

ECAT Computer Elements of “C” Test

ECAT Computer Science Chapter 19 Elements of “C” Online Test

ECAT Elements of “C” Test Online MCQs

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ECAT Computer Elements of “C” Test

ECAT Computer Science Chapter 19 Elements of “C” Online Test

ECAT Elements of “C” Test Online MCQs

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Mustansar Khan

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