LLucent Placement Paper -: Programming Questions And Answers

LLucent Previous Years Solved Sample Placement Papers

1. main()
   {
   int i;
   printf("%d", &i)+1;
   scanf("%d", i)-1;
   }
   

   a. Runtime error.

   b. Runtime error. Access violation.

   c. Compile error. Illegal syntax Ans: c. Compile error. Illegal syntax

   d. None of the above

2. main(int argc, char *argv[])
   {
   (main && argc) ? main(argc-1, NULL) : return 0;
   }
   

   a. Runtime error.

   b. Compile error. Illegal syntax Ans: b. Compile error. Illegal syntax

   c. Gets into Infinite loop

   d. None of the above

3. main()
   {
   int i;
   float *pf;
   pf = (float *)&i;
   *pf = 100.00;
   printf("%d", i);
   }
   

   a. Runtime error.

   b. 100

   c. Some Integer not 100 Ans: c. Some Integer not 100

   d. None of the above

4. main()
   {
   int i = 0xff;
   printf("%d", i<<2);
   }
   

   a. 4

   b. 512

   c. 1020

   d. 1024 Ans: d. 1024

5. #define SQR(x) x * x
   main()
   {
   printf("%d", 225/SQR(15));
   }
   

   a. 1

   b. 225

   c. 15

   d. none of the above Ans: d. none of the above

6. union u
   {
   struct st
   {
   int i : 4;
   int j : 4;
   int k : 4;
   int l;
   } st;
   int i;
   } u;
   main()
   {
   u.i = 100;
   printf("%d, %d, %d",u.i, u.st.i, u.st.l);
   }
   

   a. 4, 4, 0

   b. 0, 0, 0

   c. 100, 4, 0 Ans: c. 100, 4, 0

   d. 40, 4, 0

7. union u
   {
   union u
   {
   int i;
   int j;
   } a[10];
   int b[10];
   } u;
   main()
   {
   printf("%d", sizeof(u));
   printf("%d", sizeof(u.a));
   printf("%d", sizeof(u.a[0].i));
   }
   

   a. 4, 4, 0

   b. 0, 0, 0

   c. 100, 4, 0

   d. 40, 4, 0 Ans: d. 40, 4, 0

8. main()
   {
   int (*functable[2])(char *format, ...) ={printf, scanf};
   int i = 100;
   (*functable[0])("%d", i);
   (*functable[1])("%d", i);
   (*functable[1])("%d", i);
   (*functable[0])("%d", &i);
   }
   

   a. 100, Runtime error.

   b. 100, Random number, Random number, Random number.

   c. Compile error

   d. 100, Random number Ans: d. 100, Random number

9. main()
   {
   int i, j, *p;
   i = 25;
   j = 100;
   p = &i; /* Address of i is assigned to pointer p */
   printf("%f", i/(*p)); /* i is divided by pointer p */
   }
   

   a. Runtime error.

   b. 1.00000

   c. Compile error Ans: c. Compile error

   d. 0.00000

10. main()
    {
    int i, j;
    scanf("%d %d"+scanf("%d %d", &i, &j));
    printf("%d %d", i, j);
    }
    

    a. Runtime error.

    b. 0, 0

    c. Compile error

    d. the first two values entered by the user Ans: d. the first two values entered by the user

11. main()
    {
    char *p = "hello world";
    p[0] = 'H';
    printf("%s", p);
    }
    

    a. Runtime error Ans: a. Runtime error

    b. “Hello world”

    c. Compile error

    d. “hello world”