Subex Placement Paper -: Programming Questions With Answers

Subex Previous Years Solved Sample Placement Papers

1. What is the state of the marked line (i)?
   

   A. dangling pointer p

   B. defined

   C. memory leakage during malloc

   D. Answer: Option A

2. Solution: The `realloc(p, 0)` makes `p` a dangling pointer because it frees the memory pointed to by `p` without assigning it a new address.
3. What will the program return?
   

   A. Always 0

   B. Always 1 Answer: Option A

4. Solution: The condition `if (i++, i)` evaluates `i` after the increment, but since the incremented value is 0 (false), it always returns 0.
5. What will be the value of `is_keyword`?
   

   A. Compile error

   B. 1

   C. Error, before the `:` Answer: Option A

6. Solution: Bitfields cannot be accessed or printed without proper initialization, leading to a compile error.
7. What is the size of `ARRAY_SIZE`?
   

   A. 20

   B. 200

   C. 16

   D. 160 Answer: Option B

8. Solution: The array size is 10, and the struct size is padded to a multiple of 20. Hence, 10 x 20 = 200.
9. What will be the output of the following program?
   

   A. Hello,world0000000000

   B. Hello,worl

   C. 0000000000Hello,world

   D. Hello,world Answer: Option D

10. Solution: The program prints the string directly without adding spaces or truncating.
11. What will be the output of this program?
    

    A. The string is : First

    B. The string is : FirstSecond

    C. The string is

    D. Unknown, since the scope of the pointer is local Answer: Option C

12. Solution: The `static` variable `xxx` is overwritten with the second value "Second," so the program outputs "The string is".
13. What is the output of the following recursive program?
    

    A. 0,0,1,2,3,

    B. 4,8,12,16,0

    C. Error cannot pass element pointer

    D. 0,16,12,8,4 Answer: Option D

14. Solution: The recursive function processes the array from the last element backward, printing the elements in reverse order.
15. What is the output of the following line in a 32-bit OS?
    

    A. 4,2

    B. 1,1

    C. 1,2

    D. 2,2 Answer: Option C

16. Solution: The size of a character literal is 1 byte, while the size of a string literal includes a null terminator, making it 2 bytes.
17. What is the output of the following program?
    

    A. 150

    B. 64

    C. 125

    D. 225 Answer: Option B

18. Solution: The function computes the cube of the number 4, which is 64.