12. durability

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

What does durability mean?

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Answer & Explanation

4 Answers

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Option A

A query can never be canceled.

Additional Explanation

This option is incorrect for the stated requirement.

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Option B

Uncommitted data is always visible.

Additional Explanation

This option is incorrect for the stated requirement.

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Option C

Indexes never change.

Additional Explanation

This option is incorrect for the stated requirement.

Verified Correct Answer

Option D

After a transaction is committed, its effects are intended to survive failures according to the database's recovery guarantees.

Additional Explanation

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