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Test your knowledge in Entity Relationship Diagram Flashcards | StudBud
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Test your knowledge in Entity Relationship Diagram
Test your knowledge in Entity Relationship Diagram
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StudBud Administration
Test your knowledge in ERD. #modellingtechnique #erd #entityrelationshipdiagra
Flashcards
15 cards
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Questions
15
Answers
1
How can you easily identify whether something is an entity?
By searching for adjectives
By searching for verbs
By searching for nouns
2
Relations are represented by rectangles
TRUE
FALSE
3
What best describes a relational database
Has more than one table and the tables are linked using keys
Has only one table and the tables are not linked
4
How can we make a Conceptual Database model ?
By using a WireFrame to create a conceptual database model
By using SQL to create a conceptual database model
By using a technique named Entity Relationship Model
5
Entities are represented by rectangles
FALSE
TRUE
6
How can you easily identify whether something is an relationship?
search for numbers
search for nouns
search for verb
7
The goal with the Entity Relationship Model is to
Facilitate a programming method
Design how a database should look like - the intention of db
Facilitate organizational learning-behaviour
8
What is the relationship between students and teachers
One to One
Many To Many
One to Many
Many to One
9
What is an Attribute?
An attribute is used to represent the relationship entities
An attribute is an objects or concepts that can store data
An attribute is the smallest piece of information in an ERD
10
Attributes are represented by ovals.
FALSE
TRUE
11
What is the relationship between a student and his ID card
Many to Many
One to One
Many to One
One to Many
12
The basic components of a Entity-Relationship Model include:
Column name, Security key, File types, Attributes
Primary Key, Storage details, attributes
Entity, attribute, relationship types and cardinality
13
How can you uniquely identify every instances of an entity in a E-R Diagram?
By inserting the cardinality on the E-R Diagram
By having a relationship
By having a unique identifier (id) as an attribute
14
What best describes a database?
It is a way of storing data in an unorganised, illogical way
It is a way of storing data in an organisedand logical way
15
Can a relationship have one or more attributes?
TRUE
FALSE
