Frequently Asked Questions in Technical Round at MNCs like TCS, WIPRO, INFOSYS,..etc – 15

Predict the output or error(s) for the following:

1)

main()

{

int i=_l_abc(10);

printf("%d\n",--i);

}

int _l_abc(int i)

{

 return(i++);

}

Answer:

9

Explanation:

return(i++) it will first return i and then increments. i.e. 10 will be returned.

2)

main()

{

 char *p;

 int *q;

 long *r;

 p=q=r=0;

 p++;

 q++;

 r++;

 printf("%p...%p...%p",p,q,r);

}

Answer:

0001...0002...0004

Explanation:

++ operator  when applied to pointers increments address according to their corresponding data-types.

3)

main()

{

 char c=' ',x,convert(z);

 getc(c);

 if((c>='a') && (c<='z'))

 x=convert(c);

 printf("%c",x);

}

convert(z)

{

  return z-32;

}

Answer:

Compiler error

Explanation:

declaration of convert and format of getc() are wrong.