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Contents
Chapter 4 · DatabasePractice
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CONCEPT PRACTICE

Exclusive control preserves data integrity

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Volume 1 · Chapter 4 · Textbook Exercises · Q6

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Which of the following is an appropriate description of the exclusive control function of a DBMS?

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Source: FE Vol 1.pdf, PDF page 295, textbook p. 285 · Information-technology Promotion Agency, Japan · First Edition: April, 2015. ID: tb-v1-c4-q6. Publisher answer and commentary · private review.

Original question · Q6
Which of the following is an appropriate description of the exclusive control function of a DBMS? a) It should be used during online updates, and needs not be used during updates with batch processing. b) It can only be performed for each relation (i.e., table). c) It prevents the loss of data integrity because of a lost update or such other problem. d) The purpose of the lock method which is one of the exclusive controls is to prevent deadlock.

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