CH 3 - Software Engineering

DFD is the abbreviation of __________.

• Database File Diagram

• Data Flow Description

• Data Flow Diagram

• Database Flow Description

What is the purpose of a model in software development?

• To confuse developers

• To represent reality in a simplified way

• To increase complexity

• To slow down the development process

What is the role of abstraction in software engineering?

• To increase software complexity

• To add unnecessary details

• To complicate the design process

• To ignore irrelevant details safely

What is the main purpose of DFDs in software development?

• To slow down the development process

• To confuse developers

• To visualize the movement of data within a system

• To represent complex data structures

What is the difference between descriptive and prescriptive models?

• Descriptive models are used for generating code, while prescriptive models are for communication

• Descriptive models are used for communication, while prescriptive models guide development

• Descriptive models are detailed, while prescriptive models are abstract

• Descriptive models are abstract, while prescriptive models are detailed

What is the purpose of a Context Diagram in software development?

• To show detailed processes within the system

• To provide a top-level view of the information system

• To represent complex algorithms

• To illustrate low-level data flows

What is the main strategy for developing Data Flow Diagrams (DFDs) using a top-down approach?

• Start with the Context Diagram and then create Level-0 DFD

• Create high-level diagrams first, then low-level diagrams

• Start with low-level diagrams and then move to high-level diagrams

• Create Level-0 DFD first, then expand to Context Diagram

What is the purpose of balancing in Functional Decomposition?

• To ensure conservation of inputs and outputs in DFDs

• To confuse developers

• To add more complexity to the system

• To slow down the development process

The symbol represents ________ in DFD.

• data flow

• process

• input

• output

What is the primary function of a Source/Sink symbol in a Data Flow Diagram (DFD)?

• To store data within the system

• To represent a process in the system

• To provide a top-level view of the system

• To show external entities interacting with the system