Cengage AIS Chapter 4 Quiz Solutions

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Cengage AIS Chapter 4 Quiz Solutions

cengage exam helpQ1. Describe all the symbols used in constructing DFDs.

  • An external entity symbol portrays a source or a destination of data outside the system
  • A bubble symbol depicts an entity or a process within which incoming data flows are transformed into outgoing data flows
  • All of these choices are correct
  • A data flow symbol represents a pathway for data and a data store symbol represents a place where data are stored

Q2. Why are some entities found in a narrative included in the context diagram as external entities, whereas others are included as internal entities?

  • Entities that do not perform any information processing activities are external entities; the remaining entities are internal
  • Differentiating entities helps to strike a balance between clarity and clutter
  • Entities that do not perform any information processing activities are internal entities; the remaining entities are external
  • Differentiating entities helps to avoid crossing lines wherever possible

Q3. What is a context diagram?

  • A diagram that explains the context of the process of the company’s internal controls
  • A bottom-up diagram that shows all of the details and contextual nuances of a process
  • A top-level diagram of a system that depicts the system and all its activities as a single bubble
  • A diagram that shows the position of the process within a company’s departments

Q4. What are the differences among a context diagram, a logical DFD, and a physical DFD?

  • In a logical DFD (versus a physical or context DFD) we can concentrate on the activities that a system performs.
  • All of these choices are correct.
  • All of these choices are correct.
  • In a logical DFD, (versus a physical or context DFD) bubbles can be broken down into more detail.

Q5. When is a set of DFDs balanced?

  • When there are even numbers of processes
  • When the data flow bubbles are shown in a parallel formation within the diagram
  • When two DFDs have equivalent external data flows, the DFDs are balanced
  • When the diagram has more than one level

Q6. What is a physical data flow diagram (DFD)?

  • A diagram that tells us how data flows through the process and what activities are performed within the process
  • A top-level diagram
  • A diagram printed on paper and stored in a user manual
  • A diagram that specifies where, how, and by whom a system’s activities are accomplished

Q7. Where are error and exception routines shown on logical DFDs?

  • Logical DFDs do not allow for errors and exceptions so they are never needed
  • They are shown below the level 0 DFD with reject stubs that indicate that exceptional processing must be performed
  • They are only shown in the physical DFD
  • They are not shown at all

Q8. What is the purpose of a table of entities and activities?

  • The table is used to identify the data elements needed for the process
  • The table summarizes the narrative so that entities (nouns) and activities (verbs) found in a narrative are clearly identified
  • The table is required prior to creating any documentation
  • The table is used to identify internal controls

Q9. Which of the following entities would be considered external to a process in a data flow diagram of a cash receipts process?

  • Customer
  • Sales clerk
  • Bank
  • Both banks and customers are external entities

Q10. What is the purpose of a systems flowchart?

  • The purpose of the systems flowchart is to redesign the system
  • The purpose of the systems flowchart is to identify what data elements are needed to process transactions
  • The purpose of the systems flowchart is to give the reader a complete picture of a system by combining the physical and logical aspects
  • The purpose of the systems flowchart is to torture new accountants

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