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

Question
In an Entity-Relationship (ER) diagram, attributes are represented using which shape?
A. Rectangle
B. Square
C. Ellipse/Oval
D. Diamond
Answer: Option C
Solution (By JKExamLibrary)
Ellipses or ovals are used to represent attributes (properties) of entities in ER diagrams.
This question belongs to: Computer Database Management System (DBMS)

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Practice More Database Management System (DBMS) Questions

Question #1
What type of entity cannot be uniquely identified by its own attributes alone and must rely on a relationship with a parent entity?
A. Weak Entity
B. Associative Entity
C. Abstract Entity
D. Strong Entity
Discuss

Correct Answer: Option A

Explanation:
A Weak Entity is an entity that does not possess its own primary key and depends on an identifying relationship with a strong (owner) entity.
This question belongs to: Computer Database Management System (DBMS)
Question #2
Which normal form addresses partial dependencies, i.e., non-prime attributes dependent on part of a composite primary key?
A. 1NF
B. BCNF
C. 2NF
D. 3NF
Discuss

Correct Answer: Option C

Explanation:
Second Normal Form (2NF) eliminates partial dependencies by ensuring all non-key attributes are fully functionally dependent on the entire primary key.
This question belongs to: Computer Database Management System (DBMS)
Question #3
The concept that prevents concurrent transactions from interfering with each other and creating data inconsistencies is known as what?
A. Isolation
B. Atomicity
C. Durability
D. Consistency
Discuss

Correct Answer: Option A

Explanation:
Isolation ensures that the execution of concurrent transactions does not interfere with one another, making them appear as if they are executing sequentially.
This question belongs to: Computer Database Management System (DBMS)
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