Sapient Placement Paper -: Programming Questions With Answers

Sapient Previous Years Solved Sample Placement Papers

1. What will be the output of the following C program?
   void main()
{
int a[] = {5, 10, 15};
int i = 0, num;
num = a[++i] + ++i + (++i);
printf("%d", num);
}

   A. 6 Answer: A

   B. 17

   C. 16

   D. 12

   Solution: The `++i` modifies the index before accessing the array. Calculations proceed as: a[1] + 2 + 3 = 6.

2. What will be the output of the program?
   #include
int main()
{
int i = 5;
while (i-- >= 0)
printf("%d,", i);
i = 5;
printf("n");
while (i-- >= 0)
printf("%i,", i);
while (i-- >= 0)
printf("%d,", i);
return 0;
}

   A. 4, 3, 2, 1, 0, -1
   4, 3, 2, 1, 0, -1 Answer: A

   B. 5, 4, 3, 2, 1, 0
   5, 4, 3, 2, 1, 0

   C. Error

   D. 5, 4, 3, 2, 1, 0
   5, 4, 3, 2, 1, 0
   5, 4, 3, 2, 1, 0

   Solution: The `--` operator decrements `i` during the checks, leading to two identical decrements for the first two loops.

3. Point out the error in the following program:
   #include
int main()
{
char str[] = "Freshersworld";
printf("%.#s %2s", str, str);
return 0;
}

   A. In array declaration

   B. printf statement

   C. Unspecified character in printf

   D. No error Answer: D

   Solution: The syntax may seem unusual, but it will compile and run successfully without any issues.

4. Find the output of the following snippet:
   #include
void main()
{
char letter = 'Z';
printf("%c", letter);
}

   A. Z Answer: A

   B. 90

   C. Garbage Value

   D. Error

   Solution: The character `Z` is printed directly as it is assigned to the variable.

5. What will be the output of the program?
   #include
#define SQR(x) (x * x)
int main()
{
int a, b = 3;
a = SQR(b + 2);
printf("%d", a);
return 0;
}

   A. 25

   B. 11 Answer: B

   C. Error

   D. Garbage Value

   Solution: The macro replacement happens without parentheses around the expression. So, SQR(b+2) becomes b + 2 * b + 2 = 3 + 6 + 2 = 11.

6. What will be the output of the program if value 25 is given to scanf()?
   #include
int main()
{
int i;
printf("%d", scanf("%d", &i));
return 0;
}

   A. 1 Answer: A

   B. 2

   C. 5

   D. 25

   Solution: The `scanf` function returns the number of successful input variables. Here, only one value (25) is read successfully, so the return value is `1`.