System Analysis(Chapter 2)

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System Analysis(Chapter 2)
2014-02-03 18:58:35
System Analysis
System Analysis
Chapter 2 questions
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  1. In a DFD, processes contain the business logic, also called business rules, that transform the data and produce the required results.
    A) True
  2. .The ____ is a widely used method of visualizing and documenting software systems design.
    A) UML
  3. Which of the following is a path that development can follow?
    • A) in-house development
    • C) purchase of a software package with possible modification
    • D) use of outside consultants
  4. .Data should be entered into a system where and when it occurs because delays cause data errors.
    A) True
  5. n a DFD, the Gane and Sarson symbol for a data store is a ____.
    C) flat rectangle that is open on the right side and closed on the left side
  6. The software that a company’s IT department makes, builds, and develops is called ____ software.
    A) in-house
  7. JAD provides a fast-track approach to a full spectrum of system development tasks, including planning, design, construction, and implementation.
    B) False
  8. Some data files should be totally hidden from view, while others should have ____ so users can view, but not change, the data
    B) read-only properties
  9. Advantages of purchasing a software package over developing software in-house include all of the following except ____.
    A) satisfaction of unique business requirements
  10. System documentation always is up to date.
    B) False
  11. ____ resemble verbs that describe what and how an object does something.
    A) Methods
  12. Modified Multiple ChoiceWhen preparing a checklist of specific tasks to observe and questions to ask, a systems analyst should consider ____.
    • A) asking sufficient questions to ensure a complete understanding of the present system operation
    • B) observing all steps in a transaction and noting the documents, inputs, outputs, and processes involved
    • C) talking to the people who receive current reports to see whether the reports are complete, timely, accurate, and in a useful form
    • D) examining each form, record, and report
  13. Sequence diagrams, state transition diagrams, and activity diagrams are dynamic modeling tools that can help a systems analyst understand how objects behave and interact with the system.
    A) True
  14. n a sequence diagram, classes that send or receive messages are shown at the bottom of the diagram.
    B) False
  15. Knowledge of a company’s formal and informal structures helps a systems analyst determine the people to interview during the systems analysis phase.
    A. true
  16. A system is reliable if it adequately handles errors, such as input errors, processing errors, hardware failures, or human mistakes.
  17. In a sequence diagram, a message is identified by a narrow vertical shape that covers the lifeline
  18. When designing a questionnaire, the most important rule of all is to make sure that questions collect the right data in a form that can be used to further fact-finding.
  19. The term ____ refers to a system’s ability to handle increased business volume and transactions in the future.
    A) scalability
  20. Two data stores can be connected by a data flow without an intervening process.
  21. If management decides to develop a system in-house, then the transition to the systems design phase ends.
  22. When studying an information system, examples of actual documents should be collected using a process called ____
    D sampling