GATE CSE 2024 Session 2 Q27: True statements about two-phase locking

Which of the following statements about the Two Phase Locking (2PL) protocol is/are TRUE?

Try it: multiple select: one or more correct options

Select all correct options. No negative marking, no partial marks.

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Answer: A, C, D (official GATE 2024 final answer key)

Concept used: 2PL has a growing phase then a shrinking phase; it guarantees conflict serializability but not deadlock freedom.

First step: Check (B) against the rule that no lock may be acquired after any lock is released.

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Source: official GATE 2024 Session 2 CS question paper and final answer key, organised by IISc Bangalore. Question paper · Answer key