# Questions 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? >A. Insertion \ B. Updation \ C. Deletion --- 2. A user has an ID, name, email and group ID. One user can only have one email and it is unique. Which of the following dependencies is not correct? >A. ID -> NAME \ B. EMAIL -> NAME \ C. EMAIL -> GROUP ID \ D. NAME -> GROUP ID --- 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`. Which type of functional dependency exists? >A. No functional dependency \ B. Transitive \ C. Partial --- 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? >A. Composite \ B. Multivalued \ C. Derived \ D. Index --- # Answers 1. A. `Deletion` 2. D `NAME -> GROUP ID` 3. C `Partial` 4. C `Derived`