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Concurrency Control Notes Questions with Answers PDF Download – Test 4

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Free Concurrency Control Study App with MCQ: "In preemption technique, transactions are assigned a unique timestamp to decide whether it should wait or"; with answers: committed, executed, aborted, and rolled back. Practice Aggregate Functions Quiz Questions, download Kobo e-Book (Free Chapter) to strengthen technical understanding.

Concurrency Control MCQs – Practice Test 4 PDF Download

MCQ 16: In preemption technique, transactions are assigned a unique timestamp to decide whether it should wait or:

  1. Executed
  2. Committed
  3. Aborted
  4. Rolled back

MCQ 17: Snapshot isolation is a scheme of:

  1. Multiversion concurrency-control
  2. Multiversion two-phase locking
  3. Multiversion timestamp ordering
  4. Multiversion one-phase locking

MCQ 18: The two modes of locking a data item, are termed as 'shared' and:

  1. Composite
  2. Compatible
  3. Exclusive
  4. Linear

MCQ 19: Two-phase locking does not ensure freedom from:

  1. Obtain locks
  2. Release locks
  3. New locks
  4. Deadlocks

MCQ 20: A set of rules applied over a transaction that may lock and unlock each of the data items in the database, is known to be:

  1. Unlocking protocol
  2. Locking protocol
  3. Deadlock protocol
  4. Validation protocol

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