775. Repeatable read — transaction scenario 4

DBMS Published 30 Sept 2026 Updated 30 Sept 2026 0 Views Verified

Choose an implementation that keeps related changes atomic and makes rollback behavior explicit.

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Answer & Explanation

4 Answers

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Option A

COMMIT before every dependent statement.

Additional Explanation

This option is incorrect for the stated requirement.

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Option B

Run each statement in a separate autocommit transaction.

Additional Explanation

This option is incorrect for the stated requirement.

Verified Correct Answer

Option C

SET TRANSACTION ISOLATION LEVEL REPEATABLE READ; START TRANSACTION; SELECT * FROM orders WHERE customer_id=10; COMMIT;

Additional Explanation

Correct implementation. Prefer parameterized queries in application code, validate affected rows for UPDATE/DELETE, and use transactions for related writes.

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Option D

Use SELECT without any transaction boundary for a multi-write operation.

Additional Explanation

This option is incorrect for the stated requirement.