If are not obtained in undo operation it will cause problem in undo- phase.

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Mr. Dubey

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📊 Database Management System (DBMS)

Q. If are not obtained in undo operation it will cause problem in undo- phase.

(A) higher-level lock
(B) lower-level lock
(C) read only lock
(D) read write

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✅ Correct Answer: (B) lower-level lock

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