UML Lec3 Quiz

Question 1 of 16

1

Which are TRUE in Database Development Process?

Select one or more of the following:

Conceptual Data Model: Data analysis identify data requirements and capture them graphically
Logical Model: Convert the conceptual data model into the chosen data model for implementation, e.g. Relational model
Implementation: Implement the design using chosen DBMS software
Data Modeller: Use the software to design the database

Explanation

Question 2 of 16

1

Design Methodology: A structured approach that uses procedures, techniques, tools, and documentation aids to support and facilitate the process of design?

Select one of the following:

True
False

Explanation

Question 3 of 16

1

Which is NOT True regarding Database Design Phases?

Select one of the following:

Phase 1: Conceptual design (The process of constructing a model of the information used in an enterprise, independent of all physical consideration)
Phase 2: Logical design (The process of constructing a model of data used in an organization based on a specific data model, but independent of a particular DBMS and other physical considerations)
Phase 3: Physical design (The process of producing a description of the implementation of the database considering the target DBMS and other physical representations)
Phase 4: Deployment design (Deploy the database on the chosen DBMS)

Explanation

Question 4 of 16

1

An Entity is an object or thing we wish to store information about, and when we group a set of objects with the same properties, having an independent existence as an entity

Select one of the following:

True
False

Explanation

Question 5 of 16

1

Relationships are associations between entities and are given a name to represent its function

Select one of the following:

True
False

Explanation

Question 6 of 16

1

Which is the correct Multiplicity for a One to One (1:1) relationship?

Select one of the following:

An employ has one or less than one cars, a car belongs to only one or less employees
An employ has one car, a car belongs to only one employee
An employ must have one car, a car must belong to only one employee

Explanation

Question 7 of 16

1

Which is the correct Multiplicity for a One to Many (1:*) relationship?

Select one of the following:

A student must enrol into one or many modules
A student enrols into one module
A student may enrols into many modules

Explanation

Question 8 of 16

1

Which is the correct Multiplicity for a Many to Many (:) relationship?

Select one of the following:

A member of staff manage many properties
Many members of staff manage many properties
None or many members of staff manage none or many properties

Explanation

Question 9 of 16

1

What's the correct relationship?

Select one of the following:

Person doesn't have a car. A car is owned by no people
Person may have a car. A car is owned by one person
Person may have a car. A car is owned by one or more people

Explanation

Question 10 of 16

1

Entity attributes can be simple or composite, single or multi-valued and derived?

Select one of the following:

True
False

Explanation

Question 11 of 16

1

A primary key must be made of two columns that are unique within that table

Select one of the following:

True
False

Explanation

Question 12 of 16

1

In a relational database, relationships are expressed by foreign keys, linking one entity instance to another

Select one of the following:

True
False

Explanation

Question 13 of 16

1

A many-to-many relationship does not allow this relationship expression, because each record in each table may point to multiple records in the other table.

Select one of the following:

True
False

Explanation

Question 14 of 16

1

How would you resolve a many to many relationship?

Select one or more of the following:

Introduce a third table
Third table should have primary keys of both tables as foreign keys
This third table will have two composite primary keys
This third table will have a composite primary key

Explanation

Question 15 of 16

1

The following is an example of a...

Select one or more of the following:

Relationship Trap
Fan Trap
Entity Trap
Ambiguous Trap

Explanation

Question 16 of 16

1

Developing an ER Model involves the following steps:
Step 1 – Identify entities,
Step 2 – Work out relationships,
Step 3 – Identify attributes,
Step 4 – Identify optionality,
Step 5 – Identify key attributes,
Step 6 – Create data dictionary

Select one of the following:

True
False

	Created by Ray Welland over 12 years ago

Data Modelling

UML Lec3 Quiz

UML Lec3 Quiz

Question 1 of 16

Which are TRUE in Database Development Process?

Select one or more of the following:

Explanation

Question 2 of 16

Design Methodology: A structured approach that uses procedures, techniques, tools, and documentation aids to support and facilitate the process of design?

Select one of the following:

Explanation

Question 3 of 16

Which is NOT True regarding Database Design Phases?

Select one of the following:

Explanation

Question 4 of 16

An Entity is an object or thing we wish to store information about, and when we group a set of objects with the same properties, having an independent existence as an entity

Select one of the following:

Explanation

Question 5 of 16

Relationships are associations between entities and are given a name to represent its function

Select one of the following:

Explanation

Question 6 of 16

Which is the correct Multiplicity for a One to One (1:1) relationship?

Select one of the following:

Explanation

Question 7 of 16

Which is the correct Multiplicity for a One to Many (1:*) relationship?

Select one of the following:

Explanation

Question 8 of 16

Which is the correct Multiplicity for a Many to Many (*:*) relationship?

Select one of the following:

Explanation

Question 9 of 16

What's the correct relationship?

Select one of the following:

Explanation

Question 10 of 16

Entity attributes can be simple or composite, single or multi-valued and derived?

Select one of the following:

Explanation

Question 11 of 16

A primary key must be made of two columns that are unique within that table

Select one of the following:

Explanation

Question 12 of 16

In a relational database, relationships are expressed by foreign keys, linking one entity instance to another

Select one of the following:

Explanation

Question 13 of 16

A many-to-many relationship does not allow this relationship expression, because each record in each table may point to multiple records in the other table.

Select one of the following:

Explanation

Question 14 of 16

How would you resolve a many to many relationship?

Select one or more of the following:

Explanation

Question 15 of 16

The following is an example of a...

Select one or more of the following:

Explanation

Question 16 of 16

Developing an ER Model involves the following steps: Step 1 – Identify entities, Step 2 – Work out relationships, Step 3 – Identify attributes, Step 4 – Identify optionality, Step 5 – Identify key attributes, Step 6 – Create data dictionary

Select one of the following:

Explanation

Which is the correct Multiplicity for a Many to Many (:) relationship?

Developing an ER Model involves the following steps:
Step 1 – Identify entities,
Step 2 – Work out relationships,
Step 3 – Identify attributes,
Step 4 – Identify optionality,
Step 5 – Identify key attributes,
Step 6 – Create data dictionary