Question: Database system question 1. Based on Figure 3, which of the following choices is the logical model representing the above ER diagram. (note: underlined attributes

Database system question

Database system question 1. Based on Figure 3, which of the following

Based on Figure 3, which of the following choices is the logical model representing the above ER diagram. (note: underlined attributes are the primary key)

Select one:

choices is the logical model representing the above ER diagram. (note: underlined

16. Based on Figure 3, the original entity Video is divided into two additional entities called DVD and VideoTape. The process of dividing entity Video into two more entities is called ___________.

Select one:

A.Generalization

B.Specialization

C.Inheritance

D.Lossless-join property

Video Video_ID {PK} Price Title {Optional,or} DVD VFormat Language Video Tape TFormat Duration Figure 3 Video(Video_ID, Price, Title, VFormat, Language, TFormat, Duration, VType) A. VideoDVD(Video ID, Price, Title, VFormat, Language) Video Tape(Video ID, Price, Title, TFormat, Duration) B. Video(Video ID, Price, Title) DVD(Video ID, VFormat, Language) Tape(Video ID, TFormat, Duration) C. Video(Video ID, Price, Title) Video Type(Video ID, VFormat, Language, TFormat, Duration, VType) D

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7. Having backup equipment (e.g., paper copy of slides, an extra overhead projector bulb) should equipment fail.

10. Facilitating communications between trainer and trainees during and after training (e.g., coordinating exchange of e-mail addresses).

11. Recording course completion in the trainees training records or personnel files.