1. What is wrong with this program : main() { char *p,*q; p=(char *)malloc(25); q=(char*) malloc(25); strcpy(p,"amazon" ); strcpy(q,"hyd"); strcat(p,q); printf("%s",p); }

2. what is the output of for(;0;) printf("\n guess");

3. What will be the output? Explain.

main()

{

int i=3;

switch(i)

{

default:printf( "zero");

case 1: printf("one" );

break;

case 2:printf("two" );

break;

case 3: printf("three" );

break;

} }

4. What is the error in this snippet?

main()

{

extern int i;

i=20;

printf("%d", i);

}

5. What is the output & explain

main()sturct date {char name[20];int age ;float sal;};sturct data d ={"rajesh"};printf("%d%f",d.age,d.sal);}

6. What is the error?main(){int j=10;switch(j){ case 20:pritnf("Less than 20");break;case 30:printf("Less than 30");break;default:printf("hello");}

7. What will be the output & explain.

main(){int i;if(i=0) //it,s assisnment not logical operatorprintf(" Hell ");elseprintf("Heaven");}

8. What looks wrong with these programs?

a)#include <stdio.h>#include <stdlib.h>main(){int i;for (i=0; i<10; i=i+1) if (i<2) printf("%d is less than 2\n",i); printf("and %d is not equal to, 2 either\n",i);}

b)main(){int i; i = 0; while (i < 10); i = i + 1; printf("Finished. i = %d\n",i);}

c)#include <stdio.h>#include <stdlib.h>main(){int i;for (i=0; i<10; i=i+1) switch(i){

case 0: printf("i is 0\n"); case 1: printf("i is 1\n"); default: printf("i is more than 1\n"); }}

d)

#include <stdio.h>#include <stdlib.h>main(){int i; i=3; i=i+2*i++; printf("i is now %d\n",i);}

e)if (foo) if (bar) win (); else lose ();