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3. Suppose you have a queue in which the values 1 through 5 must be enqueued on the queue in that order, but that an item on the queue can be dequeued and printed at any time. Based on these constraints, give the list of operations that would produce each of the following sequences. If it is not possible, state so. a. 1 3 5 4 2 b. 1 2 3 4 5 c. Are there sequences that cannot occur? Explain why or why not.

3. Suppose you have a queue in which the values 1 through 5 must be enqueued on the queue in that order, but that an item on the queue can be dequeued and printed at any time. Based on these constraints, give the list of operations that would produce each of the following sequences. If it is not possible, state so. a. 1 3 5 4 2 b. 1 2 3 4 5 c. Are there sequences that cannot occur? Explain why or why not.

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
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3. Suppose you have a queue in which the values 1 through 5 must be enqueued on the queue in that order, but that an item on the queue can be dequeued and printed at any time. Based on these constraints, give the list of operations that would produce each of the following sequences. If it is not possible, state so. a. 1 3 5 4 2 b. 1 2 3 4 5 c. Are there sequences that cannot occur? Explain why or why not.
Transcribed Image Text:3. Suppose you have a queue in which the values 1 through 5 must be enqueued on the queue in that order, but that an item on the queue can be dequeued and printed at any time. Based on these constraints, give the list of operations that would produce each of the following sequences. If it is not possible, state so. a. 1 3 5 4 2 b. 1 2 3 4 5 c. Are there sequences that cannot occur? Explain why or why not.
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