Aptitude Test C Programming For Loops

Welcome to Your Quiz: Aptitude Test C Programming For Loops

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1. How many times the below loop will be executed?
#include <stdio.h>
int main()
{
int x, y;
for(x=5; x>=1; x--)
{
for(y=1; y<=x; y++)
printf("%d\n",y);
}
}

112123123412345

123451234512345123451

12345123412345121

123451234123121

2. What will be the output of the following C code?
#include <stdio.h>
int main()
{
for (int i = 0;i < 1; i++)
printf("In for loop\n");
}

Depends on the standard compiler implements

Compile time error

Depends on the compiler

In for loop

3. What will be the output of the following C code?
#include <stdio.h>
int main()
{
short i;
for (i = 1; i >= 0; i++)
printf("%d\n", i);
}

Numbers will be displayed until the signed limit of short and program will successfully terminate

The control won’t fall into the for loop

Numbers will be displayed until the signed limit of short and throw a runtime error

This program will get into an infinite loop and keep printing numbers with no errors

4. What will be the output of the following C code?
#include <stdio.h>
void main()
{
int k;
for (k = -3; k < -5; k++)
printf("Hello");
}

Run time error

Hello

Nothing

Infinite hello

5. The C code ‘for(;;)’ represents an infinite loop. It can be terminated by ___________

exit(0)

break

terminate

abort()

6. What will be the output of the following C code?
#include <stdio.h>
void main()
{
int k = 0;
for (k < 3; k++)
printf("Hello");
}

Varies

Nothing

Compile time error

Hello is printed thrice

7. Which for loop has range of similar indexes of ‘i’ used in for (i = 0;i < n; i++)?

for (i = n-1; i>0; i–)

for (i = n-1; i>-1; i–)

for (i = n; i >= 0; i–)

for (i = n; i>0; i–)

8. What will be the output of the following C code?
#include <stdio.h>
void main()
{
int k = 0;
for (k)
printf("Hello");
}

Compile time error

hello

Nothing

Varies

9. What will be the output of the following C code?
#include <stdio.h>
void main()
{
double k = 0;
for (k = 0.0; k < 3.0; k++);
printf("%lf", k);
}

1.000000

2.000000

Run time error

3.000000

10. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int i = 0;
for ( ; ; ; )
printf("In for loop\n");
printf("After loop\n");
}

Compile time error

Infinite loop

Undefined behaviour

After loop

11. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int i = 0;
for (i++; i == 1; i = 2)
printf("In for loop ");
printf("After loop\n");
}

After loop

In for loop after loop

Undefined behaviour

Compile time error

12. Which of the following cannot be used as LHS of the expression in for (exp1;exp2; exp3)?

typedef

function

macros

variable

13. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int i = 0;
for (foo(); i == 1; i = 2)
printf("In for loop\n");
printf("After loop\n");
}
int foo()
{
return 1;
}

In for loop after loop

Compile time error

After loop

Infinite loop

14. What will be the output of the following C code?
#include <stdio.h>
void main()
{
double k = 0;
for (k = 0.0; k < 3.0; k++)
printf("Hello");
}

Hello is printed infinitely

Hello is printed thrice

Hello is printed twice

Run time error

15. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int *p = NULL;
for (foo(); p; p = 0)
printf("In for loop\n");
printf("After loop\n");
}

In for loop after loop

Infinite loop

Depends on the value of NULL

Compile time error

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