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If a transaction has obtained a ________ lock, it can both read and write on the item

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If a transaction has obtained a ________ lock, it can both read and write on the item

(a) Shared mode

(b) Exclusive mode

(c) Read only mode

(d) Write only mode

I got this question in an international level competition.

This key question is from Lock Based Protocols in portion Concurrency Control of RDBMS

1 Answer

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Best answer
Right choice is (b) Exclusive mode

The explanation is: If a transaction has obtained an exclusive mode lock, then it can both read and write on the item on which it in operating.

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