FINAL EXAM (M3S2) PART 2

Question 1

consists of a series of bubbles joined by lines. the bubbles represent data transformations, and the lines represent data flows in the system.

Answer 1

Data flow diagram

Question 2

Common Symbols in DFD:

Answer 2

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

Question 3

Common Symbols in DFD:

are represented by squares as the sources or destination of data

Answer 3

External Entities

Question 4

Common Symbols in DFD:

represented by rectangles with rounded corners

Answer 4

Processes

Question 5

Common Symbols in DFD:

referred to by arrows to denote the physical or electronic flow of data

Answer 5

Data flows

Question 6

Common Symbols in DFD:

XML files

Answer 6

Data Stores

Question 7

is a structured repository of metadata that provides a comprehensive description of the data used.

Answer 7

Data dictionary

Question 8

its main purpose is to provide a common language and understanding of the data, its meaning and how it relates to other elements

Answer 8

Data Dictionary

Question 9

Components of data dictionary:

Answer 9

1. Data Element name
2. Data type
3. Domain Value
4. Definition/Description
5. Source
6. Data Created

Question 10

Components of data dictionary:

the name of the data element

Answer 10

Data Element Name

Question 11

Components of data dictionary:

describe the type of data

Answer 11

Data type

Question 12

Components of data dictionary:

defines valid values for a data element

Answer 12

Domain Value

Question 13

Components of data dictionary:

Explains the data element’s purpose

Answer 13

Source

Question 14

Components of data dictionary:

Records when the data was created

Answer 14

Data created

Question 15

is a technique used by systems analyst to model and document the logic of information processes.

Answer 15

Structured English

Question 16

Types of structure:

Answer 16

1. Sequence Structure
2. Decision Structure
3. Case Structure
4. Iteration

Question 17

is a hierarchical model used un data analysis and decision making-making

Answer 17

Decision Tree

Question 18

it visually represents a decision-making process by mapping out possible outcomes based on different choices or scenarios.

Answer 18

Decision Tree

Question 19

it is a diagram that presents conditions and actions sequentially and thus shows which conditions to consider first, which second, and so on.

Answer 19

Decision Tree

Question 20

it is also a method of showing the relationship between each condition and its permissible actions.

Answer 20

Decision Tree

Question 21

are concise visual representations used to specify which actions to perform based on given conditions.

Answer 21

Decision Table

Question 22

they serve as algorithms that produce a set of actions.

Answer 22

Decision Table

Question 23

You can think of them as a structured way to model decision-making logic, similar to if-then-else statements or switch-case constructs in programming.

Answer 23

Decision Table

Question 24

the primary strength of the “____________” is its ability to represent data flows. it may be used at a high or low level of analysis and provides good system documentation.

Answer 24

Data Flow Diagram

Question 25

the “_____________” helps the analyst simplify the structure to meet the data requirements of the system. it may be used at high or low levels of analysis, but it does not provide functional details, and it is not acceptable to many non-technical users

Answer 25

Data Dictionary

Question 26

is best used when the problem requires sequences of actions with decisions.

Answer 26

Structured English

Question 27

are used to verify logic and in problems that involve a few complex decision resulting in a limited number of actions

Answer 27

Decision Tree

Question 28

are best suited for dealing with complete branching routines such as calculating discounts or sales commissions.

Answer 28

Decision trees and Decision Tables