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Chapter 4 · DatabasePractice
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CONCEPT PRACTICE

Original one-to-many E-R example

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Volume 1 · Chapter 4 · Textbook Exercises · Q4

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Which of the following is the appropriate interpretation of the E-R model shown below? Editorial accessible diagram description: Instructor points to Class; Class points to Student. Arrowheads are at Class and Student.

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Source: FE Vol 1.pdf, PDF page 294, textbook p. 284 · Information-technology Promotion Agency, Japan · First Edition: April, 2015. ID: tb-v1-c4-q4. Publisher answer and commentary · private review.

Original question · Q4
Which of the following is the appropriate interpretation of the E-R model shown below?

Editorial accessible diagram description: Instructor points to Class; Class points to Student. Arrowheads are at Class and Student.
a) One student is looked after by one instructor.
b) One student belongs to multiple classes.
c) One instructor looks after only one class.
d) One class is looked after by two instructors, namely the homeroom teacher and deputy 
homeroom teacher.

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