Sonata Placement Paper -: Technical Questions With Answers

Sonata Previous Years Solved Sample Placement Papers

1. Point out error, if any, in the following program:

   
   main() {
     int i = 1;
     switch (i) {
       case 1:
         printf("\nRadioactive cats have 18 half-lives");
         break;
       case 1 * 2 + 4:
         printf("\nBottle for rent - inquire within");
         break;
     }
   }
       

   Ans. No error. Constant expressions like 1*2+4 are acceptable in cases of a switch.

2. Point out the error, if any, in the following program:

   
   main() {
     int a = 10, b;
     a >= 5 ? b = 100 : b = 200;
     printf("\n%d", b);
   }
       

   Ans. lvalue required in function main(). The second assignment should be written in parentheses as follows:

   a >= 5 ? b = 100 : (b = 200);

3. In the following code, in which order the functions would be called?

   a = f1(23, 14) * f2(12 / 4) + f3();

   A. f1, f2, f3

   B. f3, f2, f1

   C. The order may vary from compiler to compiler Answer: Option C

   D. None of the above

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

   
   main() {
     int i = 4;
     switch (i) {
       default:
         printf("\n A mouse is an elephant built by the Japanese");
       case 1:
         printf(" Breeding rabbits is a hare raising experience");
         break;
       case 2:
         printf("\n Friction is a drag");
         break;
       case 3:
         printf("\n If practice makes perfect, then nobody's perfect");
     }
   }
       

   A. A mouse is an elephant built by the Japanese

   B. Breeding rabbits is a hare raising experience

   C. All of the above

   D. None of the above Answer: Option D

5. What is the output of the following program?

   
   #define SQR(x) (x * x)
   main() {
     int a, b = 3;
     a = SQR(b + 2);
     printf("%d", a);
   }
       

   A. 25 Answer: Option A

   B. 11

   C. error

   D. garbage value

6. In which line of the following, an error would be reported?

   
   #define CIRCUM(R) (3.14 * R * R)
   main() {
     float r = 1.0, c;
     c = CIRCUM(r);
     printf("\n%f", c);
     if (CIRCUM(r) == 6.28)
       printf("\nGobbledygook");
   }
       

   A. line 1

   B. line 5

   C. line 6

   D. line 7 Answer: Option D

7. What is the type of the variable b in the following declaration?

   
   #define FLOATPTR float *
   FLOATPTR a, b;
       

   A. float

   B. float pointer Answer: Option B

   C. int

   D. int pointer

8. In the following code:

   
   #include 
   main() {
     FILE *fp;
     fp = fopen("trial", "r");
   }
       

   fp points to:

   A. The first character in the file.

   B. A structure which contains a "char" pointer which points to the first character in the file. Answer: Option B

   C. The name of the file.

   D. None of the above.

9. We should not read after a write to a file without an intervening call to fflush(), fseek(), or rewind(). TRUE/FALSE

   Ans. True

10. If the program (myprog) is run from the command line as myprog 1 2 3, What would be the output?

    
    main(int argc, char *argv[]) {
      int i;
      for (i = 0; i < argc; i++)
        printf("%s", argv[i]);
    }
        

    A. 1 2 3

    B. C:\\MYPROG.EXE 1 2 3 Answer: Option B

    C. MYP

    D. None of the above