System Analysis

Question 1

What phases in SDLC is Data Modeling?

Answer 1

Analysis Phase, Design Phase

Question 2

How does Data Modeling work in the Analysis Phase?

Answer 2

Presents the logical organization of data without indicating how data is stored, created, or manipulated so that analysts can focus on the business.

Question 3

How does Data Modeling work in the Design Phase?

Answer 3

It reflects how the data will be stored in databases and files.

Question 4

What does ERD stand for?

Answer 4

Entity Relationship Diagram

Question 5

What is an ERD?

Answer 5

It is a picture that shows the information that is created, stored, and used by a business system.

Question 6

What does a rectangle represent in an ERD?

Answer 6

Entity

Question 7

What is listed within an entity in an ERD?

Answer 7

An attribute

Question 8

Explain what connects entities in an ERD?

Answer 8

Relationships

Question 9

What are 3 reasons for using ERDs? (There is 5)

Answer 9

1. Helps define terms related to ER Modeling
2. Gives a preview of how your tables should connect
3. Helps describe entities, attributes, relationships
4. It is tranlatable to relational databases
5. It can be used as a blueprint

Question 10

What does an ellipse show you in an ERD?

Answer 10

Attributes

Question 11

What does a diamond represent in a ERD?

Answer 11

Relationship Set

Question 12

What does DFD stand for?

Answer 12

Data Flow Diagram

Question 13

What is the purpose of DFD?

Answer 13

It shows the flow of data and processes being performed

Question 14

In which Phase of SDLC is DFD used?

Answer 14

Analysis Phase

Question 15

What is the Context Diagram in relation to DFD?

Answer 15

It is the first DFD Diagram that shows the whole system within one environment

Question 16

What is the purpose of the Lvl 0 DFD?

Answer 16

To show all the major high level processes of the system

Question 17

What are the 4 elements of a DFD?

Answer 17

1. Processes
2. Data Flow
3. Data Stores
4. External Entities

Question 18

What is a different word for a Level 0 DFD?

Answer 18

Context Diagram

Question 19

What shape is the external entities within a DFD?

Answer 19

Oval

Question 20

What shape is a Data Store within a DFD?

Answer 20

A rectangle with the right side cut off and split into 2. On the left side it has the number (Usually D1, D standing for Database) and on the right side the data store name

Question 21

What shape is a data Flow within a DFD?

Answer 21

An arrow with the data being carried

Question 22

What shape is a proces within a DFD?

Answer 22

A square cut into 2, the top has the process number, and the bottom shows the process

Question 23

What are the 3 analysis steps?

Answer 23

1. Understanding the situation
2. Identifying the improvements
3. Defining the requirements for the new system

Question 24

What are 2 methods used in the Analysis Phase?

Answer 24

1. Waterfall and Parallel Development
2. RAD and Agile

Question 26

What does the Waterfall and Parallel Development method entail within the Analysis Phase?

Answer 26

You try to understand the system as it currently is and identify the improvements before you do the requirements.

Question 27

What does the RAD and Agile method entail within the Analysis Phase?

Answer 27

It is iterative Development and system prototyping and they only focus on the improvements without spending time on understanding the current system.

Question 28

What are the 4 requirements analysis strategies?

Answer 28

1. Problem Analysis 2. Root Cause Analysis 3. Duration Analysis 4. Outcome Analysis

Question 29

What does the Problem Analysis entail?

Answer 29

You should ask the stakeholders what the problems are in the current system and how it can be solved.

Question 30

What does the Root Cause Analysis entail?

Answer 30

Here, we focus on the problems first and not the solution and try to find the root cause of said problems

Question 31

What does Duration Analysis Entail?

Answer 31

Take an eximation of how long it takes to perform a process within the current system.

Question 32

What does the Outcome Analysis entail?

Answer 32

It is testing to see if the system gives the right outcome that a customer would want.

Question 33

What is a use case?

Answer 33

It explains the interaction between a user and the system

Question 34

It what Phase within the SDLC is Use Cases used?

Answer 34

Analysis Phase

Question 35

What are the 6 elements of a use case?

Answer 35

1. Basic Information (Name & Number) 2. Preconditions 3. Normal Course (Happy Path) 4. Alternative Courses 5. Postconditions 6. Exceptions

Question 36

What are the 4 steps into building a Use Case?

Answer 36

1. Identifying the Major Use Cases 2. Identifying the Major Steps for Each Use Case 3. Identifying elements within Steps 4. Confirm the Use Case