In an Entity-Relationship (ER) diagram, attributes are represented using which shape? MCQ with Answer and Explanation

In an Entity-Relationship (ER) diagram, attributes are represented using which shape?
A. Ellipse/Oval
B. Square
C. Diamond
D. Rectangle
Answer: Option A
Solution (By JKSSB Mock Tests)
Ellipses or ovals are used to represent attributes (properties) of entities in ER diagrams.

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Practice More Database Management System (DBMS) Questions

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Which of the following is a way to avoid redundancy in a database?
A. Denormalization
B. Normalization
C. Replication
D. Indexing

Correct Answer: Option B


Explanation:
Normalization reduces redundancy by organizing data into tables with minimal duplication.

This question belongs to: Computer Database Management System (DBMS)
Question #2
Which of the following terms refers to the duplication of data across multiple locations in a non-DBMS file system?
A. Data Integrity
B. Data Security
C. Data Redundancy
D. Data Isolation

Correct Answer: Option C


Explanation:
Data Redundancy refers to the unnecessary duplication of the exact same data in multiple files or locations, which wastes storage and can cause inconsistencies.

This question belongs to: Computer Database Management System (DBMS)
Question #3
Which language category in SQL is used by database administrators to grant and revoke access privileges and security permissions?
A. DDL
B. DCL
C. TCL
D. DML

Correct Answer: Option B


Explanation:
Data Control Language (DCL) includes commands like GRANT and REVOKE, which manage privileges and security configurations for database users.

This question belongs to: Computer Database Management System (DBMS)