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32 lines
1.1 KiB
Markdown
32 lines
1.1 KiB
Markdown
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# Questions
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1. Joe Bloggs is creating a social media today. However, Joe has kept user and group information in the same table. Now whenever Joe removes a user, the group information is also gone. Which type of anomaly is this?
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>A. Insertion \
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B. Updation \
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C. Deletion
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---
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2. A user has an ID, name, email and group ID. One user can only have one email and it is unique.
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Which of the following dependencies is not correct?
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>A. ID -> NAME \
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B. EMAIL -> NAME \
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C. EMAIL -> GROUP ID \
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D. NAME -> GROUP ID
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---
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3. Joe has created a table for group members where the columns are `Group ID, User ID, Rating, Group Name`. The primary key here is `Group ID, User ID`.
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Which type of functional dependency exists?
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>A. No functional dependency \
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B. Transitive \
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C. Partial
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---
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4. Joe has identified that one of his tables does not satisfy 1NF constraints. Which of the following types of ERD attributes are allowed under 1NF?
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>A. Composite \
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B. Multivalued \
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C. Derived \
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D. Index
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---
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# Answers
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1. A. `Deletion`
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2. D `NAME -> GROUP ID`
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3. C `Partial`
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4. C `Derived`
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