C Language Online MCQs, Practice Questions

Q1.Which of the following is a valid way to declare and initialize an array in C language?

int a[5] = {1, 2, 3};

int a[] = {1, 2, 3, , 5};

int a[5] = {1, 2, 3, 4, 5, 6};

int a[] = {1, 2, 3, 4, 5};

Q2.Which of the following is a loop that executes at least once?

switch loop

do-while loop

while loop

for loop

Q3.Which of the following is used to terminate a C program?

continue;

return 0;

exit()

break;

Q4.Which of the following is used to input data from the user in C language?

scanf()

printf()

gets()

puts()

Q5.Which keyword is used to define a function in C language?

main

void

def

func

Q6.Which keyword is used to declare a variable in C language?

float

int

def

var

Q7.Which of the following is not a valid way to compare two values in C language?

a > b

a == b

a = b

a != b

Q8.Which data type is used to represent decimal numbers in C language?

float

double

char

int

Q9.Which of the following is used to output data to the console in C language?

printf()

puts()

gets()

scanf()

Q10.Which of the following is not a valid arithmetic operator in C language?

/

-

+

*

Q11.Which of the following is not a valid control structure in C language?

goto

do-while

for

if-else

Q12.Which operator is used to access the value stored at a particular memory location in C language?

*

#

&

$

Q13.Which of the following is a valid way to declare and define a function in C language?

function add(int a, int b) { return a + b; }

void add(int a, int b) { return a + b; }

def add(int a, int b) { return a + b; }

int add(int a, int b) { return a + b; }

Q14.Which of the following is a valid way to access the first element of an array in C language?

array[-1]

array[0]

array[2]

array[1]

Q15.Which of the following is not a valid keyword in C language?

switch

print

return

case

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