In the Two-Phase Locking Protocol

question 35

Multiple Choice

In the two-phase locking protocol:

• A) A transaction only acquires a lock after the previously acquired lock has been released
• B) A transaction acquires locks as needed. After it starts releasing locks, it does not acquire new locks
• C) A transaction acquires all needed locks at once, then releases them after completion
• D) The transaction locks the full database, then releases the locks

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Definitions:

Customer

An individual or entity that purchases goods or services from another individual or entity, usually in a retail or business-to-business context.

Negotiable Instruments

Negotiable instruments are financial documents representing a promise to pay a specified amount of money, such as checks, promissory notes, and bills of exchange.

UCC Article 3

It governs negotiable instruments, including checks and notes, within the Uniform Commercial Code.

Checks

Financial instruments that instruct a bank to pay a specific amount of money from the writer's account to the person or entity in whose name the check has been issued.