stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Chapter 4 of IDDD - ERD Flashcards | StudBud
Explore
/
Chapter 4 of IDDD - ERD
Chapter 4 of IDDD - ERD
12 terms
·
StudBud Administration
·
29 plays
Test your knowledge in ERD. #modellingtechnique #erd #entityrelationshipdiagra
Flashcards
12 cards
F
Practice quiz
P
Host live
L
Questions
12
Answers
1
What is an Attribute?
An attribute is an objects or concepts that can store data
An attribute is used to represent the relationship entities
An attribute is the smallest piece of information in an ERD
2
Cardinality describes how many entity instances can be in the relationship
FALSE
TRUE
3
Attributes are represented by ovals.
FALSE
TRUE
4
How can you easily identify whether something is an entity?
By searching for adjectives
By searching for nouns
By searching for verbs
5
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
6
How can you uniquely identify every instances of an entity in a E-R Diagram?
By having a unique identifier (id) as an attribute
By having a relationship
By inserting the cardinality on the E-R Diagram
7
The goal with the Entity Relationship Model is to
Facilitate organizational learning-behaviour
Facilitate a programming method
Design how a database should look like - the intention of db
8
How can you easily identify whether something is an relationship?
search for numbers
search for verb
search for nouns
9
A recursive relationships is a relationships between an entity and itself.
FALSE
TRUE
10
The basic components of a Entity-Relationship Model include:
Column name, Security key, File types, Attributes
Entity, attribute, relationship types and cardinality
Primary Key, Storage details, attributes
11
Can a relationship have one or more attributes?
FALSE
TRUE
12
Entities are represented by rectangles
FALSE
TRUE
