TEZPUR 2025 — Computer PYQ

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Question

TEZPUR 2025 — Computer PYQ

TEZPUR | Computer | 2025

find the final value of $z$ after executing the following code fragment:

z = 0

for (x = -1 to 1 step 1)

for (y = x+1 to 5 step 2)

z = z + y;

Choose the correct answer:

Explanation

To find the value of $z$ , we need to iterate through the nested loops systematically and update the value of $z$ at each step.

1. Iteration Analysis:

When $x = - 1$ :
- Inner loop starts: $y = x + 1 = 0$ .
- Values of $y$ : $0, 2, 4$ (up to $5$ with a step of $2$ ).
- Updates to $z$ :
  $z = 0 + 0 + 2 + 4 = 6$
When $x = 0$ :
- Inner loop starts: $y = x + 1 = 1$ .
- Values of $y$ : $1, 3, 5$ (up to $5$ with a step of $2$ ).
- Updates to $z$ :
  $z = 6 + (1 + 3 + 5) = 6 + 9 = 15$
When $x = 1$ :
- Inner loop starts: $y = x + 1 = 2$ .
- Values of $y$ : $2, 4$ (up to $5$ with a step of $2$ ).
- Updates to $z$ :
  $z = 15 + (2 + 4) = 15 + 6 = 21$

2. Final Calculation:

After completing all iterations of the outer loop ( $x = - 1, 0, 1$ ), the final value of $z$ is:

$z = 21$

Conclusion:

The final value of $z$ is $21$ . The correct option is (b).