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c for Looping MCQ

Q1) What is the correct syntax of for loop in C?

for(initalization; condition; incrementoperation)
{
//statements
}

for(declaration; condition; incrementoperation)
{
//statements
}
for(declaration; incrementoperation; condition)
{
//statements
}
for(initalization;condition;incrementoperation;)
{
//statements
}

Answer:- (A).
Explanations :None

Q2) What will be the correct syntax for running two variables in for loop simultaneously?

for (i = 0; i < n; i++)
for (j = 0; j < n; j += 5)

for (i = 0, j = 0; i < n, j < n; i++, j += 5)

for (i = 0; i < n;i++){ }
for (j = 0; j < n;j += 5){ }

None of these

Answer:- (B).
Explanations : None.

Q3) What is the output of the given below program?

#include int main() { int i = 0; for (i) { printf("Hello"); } return 0; }

Know Program

Know Program is printed infinite times.

Compiled Successfully, No Output

Compile-time error

Answer:- (D).
Explanations : We must use the semicolon if we are not passing all three values in the FOR loop. The valid syntax will be:- for (i;;)

Q4) What is the output of the given below program?

#include int main() { int i; for (i=0; i<3; i++); { printf("%d", i); } return 0; }

0123

01234

4

3

Answer:- (D).
Explanations : Notice a semicolon is at the end of the for loop. The printf(“%d”, i); is not part of the for loop, it is outside of the loop therefore it will be executed after executing the for loop.

Q5) Find the output of the given program?

#include int main() { int i; for (i=0; i<=3; i++); { printf("%d", i); } return 0; }

0123

01234

4

3

Answer:- (C).
Explanations : It is similar to the previous program but this time for loop will be executed 4 times, and value of “i” becomes 4.

Q6) What is the output of the given below program?

#include int main() { int i; for (i=5; i>=2; i--); { printf("%d", i); } return 0; }

54321

5432

1

2

Answer:- (C).
Explanations :None

/. QQ7) Find the output of the given program?

#include int main() { int i; for (;;) { printf("Know Program"); break; } return 0; }

Know Program

Know Program is printed infinite times.

Compiled Successfully, No Output

Compile-time error

Answer:- (A).
Explanations :NIn the first iteration, break statement will be executed, which terminates the execution of the loop.

Q8) What is the output of the given below program?

#include int main() { for (;;) { printf("Know Program"); } }

Know Program

Know Program is printed infinite times.

Compiled Successfully, No Output

Compile-time error

Answer:- (B).
Explanations : This syntax of for loop is an example of infinite loop.

Q9) Find the output of the given program?

#include int main() { int i; for (printf("Hello "); printf("Know "); printf("Program ")) { break; } return 0; }

Hello

Hello Know

Compiled Successfully, No Output

Compile-time error

Answer:- (B).
Explanations :For loop execution process:- initialization, condition checking, statement execution, update. In initialization “Hello” will be printed, in condition checking “Know” will be printed, in the statement execution break will be executed which terminates the loop, and control came out of the loop.

Q10) How Many times will KnowProgram be printed in the below C program?

#include int main() { int i = 500; for (; i; i >>=2) { printf("KnowProgram "); } return 0; }

2

5

500

infinite times.

Answer:- (B).
Explanations :The expression set >>= 2; means set = set >> 2; that is right shift bits of set by 2 (self assigned form of >> bitwise right shift operator. Therefore on each iteration “i” will be divided by 4.

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