Data Requirements in Software Engineering
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Questions and Answers

Where do data requirements exist in the three-level requirements model?

  • Anywhere functions exist (correct)
  • Only at the top level
  • Only at the bottom level
  • Only at the middle level

    • What is the primary goal of specifying SW functionality?

  • To create data
  • To process and use data (correct)
  • To only display data
  • To only modify data

    • When should the RE start collecting data definitions?

  • After the requirements elicitation is complete
  • Only at the end of the project
  • Before the requirements elicitation process
  • During the requirements elicitation process (correct)

    • What represents major data elements at a high level of abstraction?

    <p>Input and output flows on the system's context diagram</p> Signup and view all the answers

    What should the BA do with the major data elements as elicitation progresses?

    <p>Refine them into details</p> Signup and view all the answers

    What does a data model provide?

    <p>A high-level view of the system's data</p> Signup and view all the answers

    What is the relationship between a data model and a data dictionary?

    <p>A data model provides a high-level view, while a data dictionary provides a detailed view</p> Signup and view all the answers

    What is a commonly used type of data model?

    <p>Entity-relationship diagram</p> Signup and view all the answers

    What does a data model depict?

    <p>The system's data relationships</p> Signup and view all the answers

    What is the main purpose of a data model?

    <p>To provide a high-level view of the system's data</p> Signup and view all the answers

    What does an ERD primarily represent?

    <p>Logical groups of information from the problem domain</p> Signup and view all the answers

    What can entities in an ERD represent?

    <p>Physical items or aggregations of data</p> Signup and view all the answers

    How are entities named in an ERD?

    <p>As singular nouns</p> Signup and view all the answers

    What is the purpose of an ERD notation?

    <p>To provide a standard way of representing ERDs</p> Signup and view all the answers

    What is the shape used to represent entities in an ERD?

    <p>Rectangles</p> Signup and view all the answers

    What is the type of relationship between Requester and Chemical Request?

    <p>One-to-many</p> Signup and view all the answers

    What is the purpose of labeling relationships on the lines that connect entities in an ERD?

    <p>To show the cardinality of the relationship</p> Signup and view all the answers

    What does the vertical line next to Chemical Stockroom Inventory represent in the James Martin notation?

    <p>A cardinality of 1</p> Signup and view all the answers

    What does the crow's foot symbol next to Chemical Container indicate in the James Martin notation?

    <p>A cardinality of many</p> Signup and view all the answers

    What is the relationship between a Requester and the number of requests they can place?

    <p>A Requester can place multiple requests</p> Signup and view all the answers

    What is the purpose of a data dictionary in ERD?

    <p>To contain the precise definitions of attributes</p> Signup and view all the answers

    What is an attribute in an ERD?

    <p>A named property or characteristic of an entity</p> Signup and view all the answers

    What do diamonds in an ERD represent?

    <p>Relationships</p> Signup and view all the answers

    How can relationships in an ERD be read?

    <p>In both directions</p> Signup and view all the answers

    What is an entity in an ERD?

    <p>A thing of interest with distinct existence</p> Signup and view all the answers

    What do UML class diagrams primarily show?

    <p>Relationships between entities and their attributes</p> Signup and view all the answers

    What do classes in UML class diagrams correspond to?

    <p>Entities in an ERD</p> Signup and view all the answers

    What is the main purpose of UML class diagrams in object-oriented development?

    <p>To show the relationships between data entities</p> Signup and view all the answers

    What type of development methods use UML class diagrams?

    <p>Object-oriented development</p> Signup and view all the answers

    What do logical links between classes in UML class diagrams represent?

    <p>Relationships between entities</p> Signup and view all the answers

    What is the importance of following notation conventions in data modeling?

    <p>It ensures that everyone involved in the project understands and follows the same conventions</p> Signup and view all the answers

    What do relationships between entities often reveal in data modeling?

    <p>Necessary system functionalities</p> Signup and view all the answers

    What is a common approach to modeling system functionalities in data modeling?

    <p>Use cases or process flows</p> Signup and view all the answers

    What is the primary focus of data modeling in system development?

    <p>Modeling data relationships</p> Signup and view all the answers

    Why is it important to understand the relationships between entities in data modeling?

    <p>To model necessary system functionalities</p> Signup and view all the answers

    What is the primary purpose of a data dictionary?

    <p>To collect and share information about data entities</p> Signup and view all the answers

    What is the benefit of maintaining a data dictionary?

    <p>It reduces integration and interface errors</p> Signup and view all the answers

    What is the relationship between a data dictionary and a project glossary?

    <p>A data dictionary is a separate resource from a project glossary</p> Signup and view all the answers

    Why is it important to keep a data dictionary up to date?

    <p>To avoid referring to outdated information</p> Signup and view all the answers

    What is the benefit of using consistent data definitions across the enterprise?

    <p>It reduces integration and interface errors</p> Signup and view all the answers

    What is the result of maintaining a data dictionary?

    <p>It becomes a serious investment in quality</p> Signup and view all the answers

    What is a primitive data element in the context of a data dictionary?

    <p>A data element for which no further decomposition is possible or necessary</p> Signup and view all the answers

    What is the purpose of using curly braces in describing a repeating group in a data dictionary?

    <p>To enclose the data element and indicate the maximum number of instances</p> Signup and view all the answers

    What is a characteristic of a data structure in the context of a data dictionary?

    <p>It is composed of multiple data elements</p> Signup and view all the answers

    What is the purpose of describing the data type and length of a primitive data element in a data dictionary?

    <p>To provide additional information about the data element</p> Signup and view all the answers

    What is the relationship between a data element and a repeating group in a data dictionary?

    <p>A repeating group is a collection of multiple instances of a data element</p> Signup and view all the answers

    What is the purpose of listing the allowed values of a data element in a data dictionary?

    <p>To provide additional information about the data element</p> Signup and view all the answers

    What is the significance of defining data elements precisely?

    <p>To enable accurate validation of entered data</p> Signup and view all the answers

    What is a consideration when defining a data element like 'Requester Name'?

    <p>All of the above</p> Signup and view all the answers

    What is the impact of display formats on data elements?

    <p>It introduces yet another level of variability</p> Signup and view all the answers

    What is a consideration when defining data elements like timestamps and dates?

    <p>The format to be used for display</p> Signup and view all the answers

    Why is precise definition of data elements essential for developers?

    <p>To know exactly how to validate entered data</p> Signup and view all the answers

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