Functional decomposition

Functional decomposition

1 Question: Functional decomposition is a repetitive process of breaking the description or perspective of a system down into finer and finer detail. A TrueB False2Question: The way a user can move from one display to another best describes A Dialogue sequenceB Transition planC Menu-driven interfaceD Screen sequenceE Computer interface3 Question: Which of the following focuses on how information is provided to and captured from users? A Structure chartB Flow chartC Entity-relationship diagramD PERT diagramE Interface and dialogue design4 Question: The number of entity types that participate in a relationship refers to A CardinalityB AssociationC CountD DegreeE Normalization5 Question: The primary deliverable from the conceptual data-modeling step within the analysis phase is A A state-transition diagramB An entity-relationship diagramC A context data flow diagramD A decision tableE Structured English6 Question: Desired features are those that users could live without but that are used to select between design strategies that are of almost equal value in terms of essential features. A TrueB False7 Question: One of the primary purposes of a DFD is to represent time, giving a good indication of whether data flows occur constantly in real time, once a day, or once a year. A TrueB False8 Question: The calculation of an employees salary would be represented on a data-flow diagram as a(n) A Data flowB SourceC Data storeD ProcessE Action stub9 Question: During systems design, a conceptual data model with attributes is prepared. A TrueB False10 Question: An entity instance is a single occurrence of an entity type. A TrueB False11 Question: When designing textual output, you should use single spacing wherever possible. A TrueB False12 Question: During systems implementation and operation A A conceptual data model (E-R with attributes) is preparedB A logical model (relational) is preparedC Physical files and database designs are preparedD An enterprise-wide data model is preparedE Database and file definitions are prepared13 Question: The top-down approach to data modeling derives a data model from an intimate understanding of the nature of the business. A TrueB False14 Question: Which of the following is a guideline for displaying text? A Use double spacing if space permitsB Do not hyphenate words between linesC Left-justify text and leave a ragged right marginD Display text in mixed upper- and lowercase and use conventional punctuationE All of the above are guidelines for displaying text15 Question: Data contained on a customer order form would be represented on a data-flow diagram as a A ProcessB Data flowC SourceD SinkE Relationship16 Question: Completeness, consistency, timing, iterative development, and primitive DFDs are guidelines for drawing DFDs. A TrueB False17 Question: Which of the following is a true statement regarding a data store? A Data can move directly from one data store to another data storeB Data stores illustrate relationships among entitiesC A data store has a noun phrase labelD Data can move from an outside source to a data storeE A data store shows data in motion18 Question: Designing usable forms and reports requires your active interaction with users. A TrueB False19 Question: The most common format used for data modeling is A State-transition diagrammingB Entity-relationship diagrammingC Process modelingD Logic modelingE A flowchart20 Question: A data-flow diagram that represents a systems major processes, data flows, and data stores at a high level of detail refers to a A Context diagramB Level-1 diagramC Level-0 diagramD Level-00 diagramE Logic diagram21 Question: Each of the following is a guideline for displaying text except A Use abbreviations and acronyms instead of full textB Do not hyphenate words between linesC Left-justify text and leave a ragged right marginD Display text in mixed upper- and lowercase and use conventional punctuationE Use double spacing if space permits22 Question: Designing usable forms and reports requires A PrototypingB Data modelingC Active interaction with end usersD Process modelingE Using structured analysis23 Question: While essential features help screen out possible solutions, desirable features help compare alternative design strategies. A TrueB False24 Question: The names of data stores on primitive-level data flow diagrams often correspond to the names of data entities in entity-relationship (E-R) diagrams. A TrueB False25 Question: A data flow represents data in motion, moving from one place in the system to another. A TrueB False


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