Sonata Placement Paper -: Technical Questions With Answers

Sonata Previous Years Solved Sample Placement Papers

1. What would be the output of the following program?
   

   main()
   {
       char near * near *ptr1;
       char near * far *ptr2;
       char near * huge *ptr3;
       printf("%d %d %d", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3));
   }

   A. 1 1 1

   B. 1 2 4

   C. 2 4 4

   D. 4 4 4 Answer: Option D

2. If the following program (myprog) is run from the command line as myprog friday tuesday sunday, what would be the output?
   

   main(int argc, char *argv[])
   {
       printf("%c", **++argv);
   }

   A. m

   B. f Answer: Option B

   C. myprog

   D. friday

3. If the following program (myprog) is run from the command line as myprog friday tuesday sunday, what would be the output?
   

   main(int argc, char *argv[])
   {
       printf("%c", *++argv[1]);
   }

   A. r Answer: Option A

   B. f

   C. m

   D. y

4. If the following program (myprog) is run from the command line as myprog friday tuesday sunday, what would be the output?
   

   main(int argc, char *argv[])
   {
       while (sizeofargv)
           printf("%s", argv[--sizeofargv]);
   }

   A. myprog friday tuesday sunday

   B. myprog friday tuesday

   C. sunday tuesday friday myprog Answer: Option C

   D. sunday tuesday friday

5. Point out the error in the following program:
   

   main()
   {
       int a=10;
       void f();
       a=f();
       printf("\n%d", a);
   }
   void f()
   {
       printf("\nHi");
   }

   Ans: The program is trying to collect the value of a "void" function into an integer variable.

6. In the following program, how would you print 50 using p?
   

   main()
   {
       int a[]={10, 20, 30, 40, 50};
       char *p;
       p = (char*) a;
   }

   Ans: printf("\n%d", *((int*)p + 4));

7. Would the following program compile?
   

   main()
   {
       int a=10, *j;
       void *k;
       j = k = &a;
       j++;
       k++;
       printf("\n%u%u", j, k);
   }

   A. Yes

   B. No, the format is incorrect

   C. No, the arithmetic operation is not permitted on void pointers Answer: Option C

   D. No, the arithmetic operation is not permitted on pointers

8. According to ANSI specifications, which is the correct way of declaring main() when it receives command line arguments?
   

   A. main(int argc, char *argv[]) Answer: Option A

   B. main(argc, argv) int argc; char *argv[];

   C. main() {int argc; char *argv[]; }

   D. None of the above

9. What error would the following function give on compilation?
   

   f(int a, int b)
   {
       int a;
       a = 20;
       return a;
   }

   A. missing parenthesis in the return statement

   B. The function should be declared as int f(int a, int b)

   C. redeclaration of a Answer: Option C

   D. None of the above

10. Point out the error in the following program:
    

    main()
    {
        const char *fun();
        *fun() = 'A';
    }
    const char *fun()
    {
        return "Hello";
    }

    Ans: fun() returns to a "const char" pointer which cannot be modified.

11. What would be the output of the following program?
    

    main()
    {
        const int x = 5;
        int *ptrx;
        ptrx = &x;
        *ptrx = 10;
        printf("%d", x);
    }

    A. 5 Answer: Option A

    B. 10

    C. Error

    D. Garbage value

12. A switch statement cannot include:
    

    A. constants as arguments

    B. constant expression as arguments

    C. string as an argument Answer: Option C

    D. None of the above

13. How long will the following program run?
    

    main()
    {
        printf("\nSonata Software");
        main();
    }

    A. infinite loop

    B. until the stack overflows Answer: Option B

    C. All of the above

    D. None of the above

14. On combining the following statements, you will get char *p; p = malloc(100);:
    

    A. char *p = malloc(100);

    B. p = (char*) malloc(100);

    C. All of the above Answer: Option C

    D. None of the above

15. What is the output of the following program?
    

    main()
    {
        int n = 5;
        printf("\nn = %*d", n, n);
    }

    A. n=5

    B. n=5

    C. n= 5 Answer: Option C

    D. error