Gate-2017 C - Programming Solved Questions

1.Consider the following function implemented in C:

      
 
      Void printxy(int x, int y)   {
            Int *ptr;
            X=0;
            Ptr=&x; // ptr->(x=0)
            Y=*ptr;// y=0
            *ptr=1;//x=1
            Printf(“%d%d”,x,y);
           }

The output of invoking printxy(1,1) is:

Ans. 1,0

2.Consider the following function implemented in C:

      
    
 

     #include
       Int main(){
          Int m=10;
          Int n,n1;  
          n=++m;       // n=11
          n1=m++;     //n1=12
          n--;        //n=10
          --n1;      //n1=11
          n-=n1;     // n=n-n1i.e n=10-11=-1
          printf(“%d”,n);
          return 0;
        }

The output of program is:

Ans.  -1

3.Consider the following function implemented in C:

 
 


  #include
  #include
     Int main() {
       Char *c=”GATECSIT2017”;
       Char *p=c;
       Printf(“”,(int)strln(c+2[p]-6[p]-1));// 
   Return 0;
 }

The output of program is:

Ans. 2

4. Consider the following of a c program .assume that swap(&x,&y) exchange the content of x and y:

Int main() {
Int array[]={3,5,1,4,6,2};
Int done=0;
Int I;
While(done==0) {
 Done=1;
For(i=0;i<=4;i++) {
        If(array[i]<array[i+1){
        Swap(&array[i],&array[i+1]);
       done=0;
         }
}
For(i=5;i>=1;i--) {
        If(array[i]>array[i-1){
        Swap(&array[i],&array[i-1]);
       done=0;
         }

}
}
Printf(“%d”,array[3]);
}

The output of program is:

Ans. 3