Looptrics
Working with LOOPS
- 1.What will be output of following c code? #includeextern int x;int main(){ do{ do{ printf("%o",x); } while(!-2); } while(0); return 0;}int x=8;
- A.
8
- B.
10
- C.
18 8
- D.
Run time error
- 2.What will be output of following c code? #include<stdio.h>int main(){ int i=2,j=2; while(i+1?--i:j++) printf("%d",i); return 0;}
- A.
2 1
- B.
1 0
- C.
1
- D.
0
- 3.What will be output of following c code? #include<stdio.h>int main(){ int x=011,i; for(i=0;i<x;i+=3){ printf("Start "); continue; printf("End"); } return 0;}
- A.
Start Start Start End
- B.
Start end Start End Start End
- C.
Start Start Start
- D.
Start End Start
- 4.What will be output of following c code? #include<stdio.h>int main(){ int i,j; i=j=2,3; while(--i&&j++) printf("%d %d",i,j); return 0;}
- A.
1 2
- B.
1 3
- C.
1 4
- D.
Error
- 5.What will be output of following c code? #include<stdio.h>int main(){ static int i; for(++i;++i;++i) { printf("%d ",i); if(i==4) break; } return 0;}
- A.
Infinite loop
- B.
3 6
- C.
2 4
- D.
3 5
- 6.What will be output of following c code? #include<stdio.h>int main(){ int i=1; for(i=0;i=-1;i=1) { printf("%d ",i); if(i!=1) break; } return 0;}
- A.
-1
- B.
Conditional error
- C.
1
- D.
0
- 7.What will be output of following c code? #include<stdio.h>int main(){ for(;;) { printf("%d ",10); } return 0;}
- A.
10
- B.
Infinite loops
- C.
Loops initialization required
- D.
Runtime error
- 8.What will be output of following c code? #include<stdio.h>int r();int main(){ for(r();r();r()) { printf("%d ",r()); } return 0;}int r(){ int static num=7; return num--;}
- A.
7 6 5 4 3 2 1
- B.
Infinite loops
- C.
5 2
- D.
6 6
- 9.Output of following C program?#include<stdio.h>int main(){ int i = 0; for (printf("1st\n"); i < 2 && printf("2nd\n"); ++i && printf("3rd\n")) { printf("*\n"); } return 0;}
- A.
1st 2nd * 3rd 2nd *
- B.
1st 2nd * 3rd 2nd * 3rd
- C.
1st 2nd 3rd * 2nd 3rd
- D.
1st 2nd 3rd * 1st 2nd 3rd
- 10.#includeint main(){ int i; for(i=0;i<=5;i++); printf("%d",i); return 0;}
- A.
0 1 2 3 4 5
- B.
6
- C.
Error
- D.
5
- 11.What will be output of following c code? #include<stdio.h>int i=40;extern int i;int main(){ do{ printf("%d",i++); } while(5,4,3,2,1,0); return 0;}
- A.
Runtime error
- B.
40
- C.
40 40 40 40 40
- D.
40 41 42 43 44
- 12.Output?#include <stdio.h>int main(){ int c = 5, no = 10; do { no /= c; } while(c--); printf ("%d\n", no); return 0;}
- A.
1
- B.
Runtime Error
- C.
0
- D.
Compile Time Error
- 13.What will be output of following c code? #include<stdio.h>int main(){ int i; for(i=10;i<=15;i++){ while(i){ do{ printf("%d ",1); if(i>>1) continue; }while(0); break; } } return 0;}
- A.
1 1 1 1 1 1
- B.
1 1 1 1 1
- C.
Infinite Loops
- D.
1 1 1 1 1 1 1 1
- 14.How many times this loop will execute? #include<stdio.h>int main(){ char c=125; do printf("%d ",c); while(c++); return 0;}
- A.
Finite Times
- B.
Infinite Times
- C.
One time
- D.
Three times
- 15.What will be output of following c code? #include<stdio.h>int main(){ int x=123; int i={ printf("c" "++") }; for(x=0;x<=i;x++){ printf("%x ",x); } return 0;}
- A.
C ++ 0 1 2 3
- B.
Improper initialization of integer variable
- C.
123
- D.
C++ 0 1 2 3
- 16.How many times will Hello be printed in the below program?#include <stdio.h> int main(){ int i = 1024; for (; i; i >>= 1) printf("Hello"); return 0;}
- A.
10
- B.
11
- C.
1024
- D.
2
- 17.What will be the output of the below code?#include<stdio.h>int main(){ int n; for (n = 9; n!=0; n--) printf("n = %d", n--); return 0;}
- A.
Infinite Loops
- B.
N = 9n = 8n = 7n= 6n = 5n = 4n = 3n = 2n = 1
- C.
N = 9n= 7n = 5n = 3n = 1
- D.
N = 9n= 6n = 3n =1
- 18.What will be the output of the program, if a short int is 2 bytes wide?#include<stdio.h>int main(){ short int i = 0; for(i<=5 && i>=-1; ++i; i>0) printf("%u,", i); return 0;}
- A.
1 ... 65535
- B.
Expression syntax error
- C.
No Output
- D.
0, 1, 2, 3, 4, 5
- 19.Point out the error, if any in the for loop.#include<stdio.h>int main(){ int i=1; for(;;) { printf("%d\n", i++); if(i>10) break; } return 0}
- A.
There should be a condition in the for loop
- B.
The two semicolons should be dropped
- C.
The for loop should be replaced with while loop
- D.
No Error
- 20.What will be the output of the program? #include<stdio.h>int main(){ int x=1, y=1; for(; y; printf("%d %d\n", x, y)) { y = x++ <= 5; } printf("\n"); return 0;}
- A.
2 1 3 1 4 1 5 1 6 1 7 0
- B.
2 1 3 1 4 1 5 1 6 1
- C.
2 1 3 1 4 1 5 1
- D.
2 2 3 3 4 4 5 5
- 21.Which of the following statement creates infinite loop?
- A.
For ( ; ; )
- B.
While ( ; ; )
- C.
When ( ; ; )
- D.
if( ; ; )
- 22.What is the output of this C code? #include <stdio.h> int main() { while () printf("In while loop "); printf("After loop\n"); }
- A.
In while loop after loop
- B.
After Loop
- C.
Compile Time Error
- D.
Infinite loop
- 23.How many times i value is checked in the below code? #include <stdio.h> int main() { int i = 0; do { i++; printf("in while loop\n"); } while (i < 3); }
- A.
2
- B.
3
- C.
4
- D.
1
- 24.What is the output of this C code? #include <stdio.h> void main() { int i = 2; do { printf("Hi"); } while (i < 2) }
- A.
Compile Time Error
- B.
Hi Hi
- C.
Hi
- D.
Varies
- 25.How many times the while loop will get executed if a short int is 2 byte wide?#include<stdio.h>int main(){ int j=1; while(j <= 255) { printf("%c %d\n", j, j); j++; } return 0;}
- A.
Infinite Times
- B.
255 Times
- C.
256 Times
- D.
254 Times
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