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If a transaction may release locks but may not obtain any locks, it is said to be in ______ phase

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If a transaction may release locks but may not obtain any locks, it is said to be in ______ phase

(a) Growing phase

(b) Shrinking phase

(c) Deadlock phase

(d) Starved phase

The question was asked in exam.

My query is from Lock Based Protocols topic in section Concurrency Control of RDBMS

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The correct choice is (b) Shrinking phase

For explanation: If a transaction may release locks but may not obtain any locks, it is said to be in shrinking phase. Shrinking phase is a phase in two phased locking protocol.

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