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Which of the following is true when comparing sentinel loops and user confirmation loops? Select one: a. Both types of loops may not iterate at all. b. A user confirmation loop can do no iterations, but a sentinel loop has to iterate at least once. c. A user confirmation loop iterates at least once, but a sentinel loop can do no iterations. d. Both types of loops must iterate at least once.

Which of the following is true when comparing sentinel loops and user confirmation loops? Select one: a. Both types of loops may not iterate at all. b. A user confirmation loop can do no iterations, but a sentinel loop has to iterate at least once. c. A user confirmation loop iterates at least once, but a sentinel loop can do no iterations. d. Both types of loops must iterate at least once.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Which of the following is true when comparing sentinel loops and user confirmation loops?

Select one:
a. Both types of loops may not iterate at all.
b.
A user confirmation loop can do no iterations, but a sentinel loop has to iterate at least once.
c.
A user confirmation loop iterates at least once, but a sentinel loop can do no iterations.
d. Both types of loops must iterate at least once.
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