Placement Papers - DeShaw

CATTERPILLER PLACEMENT PAPER 1   
   Paper : Deshaw Technical Questions Paper  Pattern    
  
   1. typedef struct{
   char *;
  nodeptr next;
  } * nodeptr;
  what does nodeptr stand for?
    
   2. supposing thaty each integer occupies  4 bytes and each charactrer  1 byte , what is the output of the  following programme?
    
  #include   
  main()
  {
  int a ={ 1,2,3,4,5,6,7};
  char c = {\' a\',\'x\',\'h\',\'o\',\'k\'};
  printf("%dt %d ",  (&a[3]-&a[0]),(&c[3]-&c[0]));
  }
  Ans :  : 3 3
    
   3. what is the output of the program?
      
  #include   
  main()
  {
  struct s1 {int i; };
  struct s2 {int i; };
  struct s1 st1;
  struct s2 st2;
  st1.i =5;
  st2 = st1;
  printf(" %d " , st2.i);
  }
    
  Ans : : nothing (error)
  expl: diff struct variables should not  assigned using "=" operator.
    
   4.what is the output of the program?
      
  #include   
  main()
  {
  int i,j;
  int mat[3][3] ={1,2,3,4,5,6,7,8,9};
  for (i=2;i>=0;i--)
  for ( j=2;j>=0;j--)
  printf("%d" , *(*(mat+j)+i));
  }
    
  Ans : : 9 6 3 8 5 2 7 4 1
    
   5.
   fun(n);
  }
  int fun( int n)
  {
  int i;
  for(i=0;i<=n;i++)
  fun(n-i);
  printf(" well done");
    
  }
  howmany times is the printf statement  executed for n=10?
    
  Ans : : zero
  expl: Befire reaching to printf  statement it will goes to infinite loop.
    
   6.what is the output of the program?
   main()
  {
  struct emp{
  char emp;
  int empno;
  float sal;
  };
  struct emp member = {  "TIGER"};
  printf(" %d %f",  member.empno,member.sal);
    
  Ans : : error. In struct variable emp, we  have to give array size.
  If array size given
  Ans : is 0, 0.00
    
   7. output of the program?
      
  # define infiniteloop while(1)
  main()
  {
  infiniteloop;
  printf("DONE");
  }
    
  Ans : : none
  expl: infiniteloop in main ends with  ";" . so loop will not reach end;
  and the DONE also will not print.
    
   8. output of the program?
   main()
  {
  int a=2, b=3;
  printf(" %d ", a+++b);
  }
    
  Ans : :5
  expl: here it evaluates as a++ + b.
    
   9. output of the program?
      
  #define prn(a) printf("%d",a)
  #define print(a,b,c) prn(a), prn(b),  prn(c)
  #define max(a,b) (a   
    
  main()
  {
  int x=1, y=2;
  print(max(x++,y),x,y);
  print(max(x++,y),x,y);
  }
    
  Ans : : 3 4 2
    
   10. which of the following is the  correct declaration for the function main() ?
      
  Ans : : main( int , char *)
      
   11. if ptr is defined as
      
  int *ptr[100];
  which of the following correctly  allocates memory for ptr?
    
  Ans : : ptr = (int *)(malloc(100*  sizeof(int));