Understanding E-R Diagrams

Understanding E-R Diagrams

University

15 Qs

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Understanding E-R Diagrams

Understanding E-R Diagrams

Assessment

Quiz

Computers

University

Practice Problem

Easy

Created by

M Kanipriya

Used 3+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does E-R stand for in database design?

Entity-Relation

Entity-Relationship

Entity-Reference

Entity-Record

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Define an entity in the context of an E-R diagram.

An entity is a real-world object or concept represented in an E-R diagram.

An entity is a specific attribute of a real-world object.

An entity is a graphical representation of data flow.

An entity is a type of relationship in an E-R diagram.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the difference between a strong entity and a weak entity?

A strong entity has a primary key; a weak entity relies on a strong entity and does not have a primary key.

Both strong and weak entities have primary keys but differ in their attributes.

A strong entity is dependent on a weak entity; a weak entity is independent.

A strong entity has no primary key; a weak entity has a primary key.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

List three types of attributes in an E-R diagram.

Key attributes

Simple attributes, Composite attributes, Derived attributes

Primary attributes

Foreign attributes

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a relationship in an E-R diagram?

A relationship in an E-R diagram represents a single data point.

A relationship in an E-R diagram is a type of entity.

A relationship in an E-R diagram is used to define attributes of an entity.

A relationship in an E-R diagram shows how entities are connected to each other.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Explain the concept of cardinality in E-R diagrams.

Cardinality refers to the color coding of entities in E-R diagrams.

Cardinality indicates the size of the database in E-R diagrams.

Cardinality is the process of normalizing data in E-R diagrams.

Cardinality specifies the number of instances of one entity that can or must be associated with instances of another entity in E-R diagrams.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does participation mean in the context of relationships?

Participation is about one person making all the decisions.

Participation means ignoring each other's needs.

Participation refers to passive observation in a relationship.

Participation means active involvement and engagement in the dynamics of a relationship.

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