C-Objective questions and answers on loops SET
1. The following code ‘for(;;)’ represents an infinite loop. It can be terminated by.
a) break
b) exit(0)
c) abort()
d) All of the mentioned
2)What is the output of this C code?
#include <stdio.h>
int main()
{
short i;
for (i = 1; i >= 0; i++)
printf("%d\n", i);
}
a) The control won’t fall into the for loop
b) Numbers will be displayed until the signed limit of short and throw a runtime error
c) Numbers will be displayed until the signed limit of short and program will successfully terminate
d) This program will get into an infinite loop and keep printing numbers with no errors
3)What is the output of this C code?
#include <stdio.h>
void main()
{
int k = 0;
for (k)
printf("Hello");
}
a) Compile time error
b) hello
c) Nothing
d) Varies
4) What is the output of this C code?
#include <stdio.h>
void main()
{
int k = 0;
for (k < 3; k++)
printf("Hello");
}
a) Compile time error
b) Hello is printed thrice
c) Nothing
d) Varies
5)What is the output of this C code?
#include <stdio.h>
void main()
{
double k = 0;
for (k = 0.0; k < 3.0; k++)
printf("Hello");
}
a) Run time error
b) Hello is printed thrice
c) Hello is printed twice
d) Hello is printed infinitely
6) What is the output of this C code?
#include <stdio.h>
void main()
{
double k = 0;
for (k = 0.0; k < 3.0; k++);
printf("%lf", k);
}
a) 2.000000
b) 4.000000
c) 3.000000
d) Run time error
7) What is the output of this C code?
#include <stdio.h>
void main()
{
int k;
for (k = -3; k < -5; k++)
printf("Hello");
}
a) Hello
b) Infinite hello
c) Run time error
d) Nothing
8)What is the output of this C code?
#include <stdio.h>
int main()
{
int i = 0;
for (; ; ;)
printf("In for loop\n");
printf("After loop\n");
}
a) Compile time error
b) Infinite loop
c) After loop
d) Undefined behaviour
9) What is the output of this C code?
#include <stdio.h>
int main()
{
int i = 0;
for (i++; i == 1; i = 2)
printf("In for loop ");
printf("After loop\n");
}
a) In for loop after loop
b) After loop
c) Compile time error
d) Undefined behaviour
10) What is the output of this C code?
#include <stdio.h>
int main()
{
int *p = NULL;
for (foo(); p; p = 0)
printf("In for loop\n");
printf("After loop\n");
}
a) In for loop after loop
b) Compile time error
c) Infinite loop
d) Depends on the value of NULL
KEY:1)a 2)c 3)a 4)a 5)b 6)c 7)d 8)a 9)a 10
