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Data Flow Diagram Symbols and Rules Quiz

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Data Flow Diagram Symbols and Rules Quiz

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Questions and Answers

What is the purpose of using a use-case diagram?

To represent data transformations

To display detailed coding information

To visually show the functionalities of a system (correct)

To indicate technical specifications

In a library borrowing system use-case diagram, which actor interacts with functionalities like 'Search Books' and 'Borrow Book'?

Visitor

Borrower (correct)

Librarian

Customer

What should you focus on when presenting to technical stakeholders about a system?

Detailed coding information (correct)

Clarity in DFD

Top-down decomposition

High-level functionalities

Which symbol in Data Flow Diagrams (DFD) represents a transformation of data?

Rounded rectangle Signup and view all the answers

What should be considered when tailoring the level of detail in a presentation to a general audience?

Maintain a clear and concise tone Signup and view all the answers

What do sequence diagrams help to visualize in software systems?

Interaction between objects over time Signup and view all the answers

What is the purpose of establishing Data Stores in a DFD?

To store data within the system and indicate how it is accessed and modified Signup and view all the answers

In a Context Diagram (Level 0), what shape is typically used to represent the entire system?

Rounded rectangle Signup and view all the answers

What is the recommended approach for decomposing a system in DFDs?

Top-down decomposition Signup and view all the answers

Why is ensuring data flow balance important in DFDs?

To maintain consistency across the DFD hierarchy Signup and view all the answers

What is a key tip for reviewing and refining a DFD?

Double-check for accuracy and completeness Signup and view all the answers

Why is clarity important when creating a Data Flow Diagram?

To ensure easy understanding of the diagram Signup and view all the answers

Which of the following statements is true about data flows in a Data Flow Diagram (DFD)?

All data flows must originate and terminate at a process Signup and view all the answers

What is the purpose of the top-down decomposition approach in developing DFDs?

To break down a system into smaller, more manageable components Signup and view all the answers

Which of the following DFD levels shows the entire system as a single process?

Context Diagram (Level 0) Signup and view all the answers

What is the purpose of the balancing step in developing DFDs?

To ensure that inputs and outputs are consistent across DFD levels Signup and view all the answers

Which of the following statements is true about external entities in a DFD?

External entities must be connected to a process by a data flow Signup and view all the answers

What is the first step in developing a DFD, according to the text?

Define the system scope Signup and view all the answers