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

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

"A"

'A'

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

void fun()

function fun()

declare fun()

int = fun()

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

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

Class

Interface

Function

Object

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

object

struct

typedef

define

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

8. What does getch() function do?

Terminates the program

Compares characters

Reads a single character without echoing

Prints a character

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

strlength()

length()

strlen()

sizeof()

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

int p = NULL;

Both A and B

int *p = NULL;

int *p = 0;

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

static

extern

volatile

loop

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

struct

typedef

alias

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

/* */

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

+, -, *, /

/, *, -, +

*, +, /, -

*, /, +, -

15. Which operator has the highest precedence?

()

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

constant

const int

#define

static

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

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

char name(20);

str name;

char name[20];

string name[20];

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

static

final

const

extern

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

if (condition) then else

condition ? if : else

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

if ? then : else

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

strcpy()

strcat()

append()

stradd()

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

while

do-while

for

select

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

end()

stop()

terminate()

exit()

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

private

auto

static

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

Curly braces {}

Angle brackets

Brackets []

Parentheses ()

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

Garbage value

NULL

27. What does the keyword extern indicate?

A variable with garbage value

A variable defined elsewhere

A local variable

A private variable

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

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

1 to 255

0 to 255

0 to 127

-128 to 127

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

Variable

Constant

Array

Function

31. Which format specifier is used for double values?

%lf

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

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

#define

define

macro

const

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

false

true

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

stdlib.h

math.h

stdio.h

string.h

36. What does the keyword static do?

Preserves the value of a variable between function calls

Allows modification

Frees memory

Makes a variable global

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

assign()

copystr()

strcopy()

strcpy()

38. What is a pointer?

A compiler error

A keyword

A data type

A variable that stores an address

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

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

conio.h

string.h

stdio.h

stdlib.h

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

It initializes a variable

It sends 0 to the compiler

It returns success to the operating system

It stops the program

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

char

float

short

int

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

def myFunction()

function myFunction()

void myFunction();

func myFunction()

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

continue

switch

for

break

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

printf

while

scanf

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

scanf()

malloc()

printf()

exit()

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

48. Which of these is a bitwise operator?

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

Depends on the compiler

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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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