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

switch

break

for

continue

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

if ? then : else

if (condition) then else

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

condition ? if : else

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

stradd()

strcat()

strcpy()

append()

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

false

true

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

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

7. What is a pointer?

A compiler error

A keyword

A data type

A variable that stores an address

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

It returns success to the operating system

It stops the program

It sends 0 to the compiler

It initializes a variable

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

int *p = NULL;

int *p = 0;

Both A and B

int p = NULL;

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

private

static

auto

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

void myFunction();

function myFunction()

func myFunction()

def myFunction()

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

Angle brackets

Curly braces {}

Parentheses ()

Brackets []

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

printf()

scanf()

malloc()

exit()

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

strlen()

sizeof()

strlength()

length()

15. Which of these is a bitwise operator?

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

conio.h

stdlib.h

stdio.h

string.h

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

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

const int

#define

static

constant

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

/* */

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

define

#define

macro

const

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

end()

terminate()

stop()

exit()

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

23. Which format specifier is used for double values?

%lf

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

/, *, -, +

*, +, /, -

+, -, *, /

*, /, +, -

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

object

typedef

struct

define

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

NULL

Garbage value

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

stdio.h

string.h

math.h

stdlib.h

28. Which operator has the highest precedence?

()

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

Depends on the compiler

30. What does the keyword static do?

Makes a variable global

Allows modification

Frees memory

Preserves the value of a variable between function calls

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

int

short

float

char

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

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

1 to 255

0 to 127

0 to 255

-128 to 127

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

extern

static

loop

volatile

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

alias

typedef

struct

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

"A"

'A'

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

string name[20];

char name(20);

char name[20];

str name;

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

function fun()

void fun()

int = fun()

declare fun()

39. What does getch() function do?

Prints a character

Terminates the program

Compares characters

Reads a single character without echoing

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

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

const

final

extern

static

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

Interface

Function

Class

Object

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

Function

Constant

Array

Variable

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

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

scanf

while

printf

46. What does the keyword extern indicate?

A variable defined elsewhere

A private variable

A local variable

A variable with garbage value

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

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

do-while

while

for

select

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

copystr()

strcpy()

strcopy()

assign()

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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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