Answer & Explanation

4 Answers
Verified

Option A

Every query returns identical rows forever.
Additional Explanation
This option is incorrect for the stated requirement.
Sarkari Resultess
Editorial Answer 1
Verified

Option B

All transactions run at the same speed.
Additional Explanation
This option is incorrect for the stated requirement.
Sarkari Resultess
Editorial Answer 2
Verified Correct Answer

Option C

A successful transaction moves the database from one valid state to another while respecting defined integrity rules.
Additional Explanation
Correct implementation. Prefer parameterized queries in application code, validate affected rows for UPDATE/DELETE, and use transactions for related writes.
Sarkari Resultess
Editorial Answer 3
Verified

Option D

The database never allows NULL.
Additional Explanation
This option is incorrect for the stated requirement.
Sarkari Resultess
Editorial Answer 4