Data Quality and Strategies Lecture 01 Quiz
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What is the primary definition of data quality?

  • The extent to which age of the data is appropriate for the task at hand
  • A characteristic or part of information for classifying information and data requirements
  • Fitness for use or meeting user needs (correct)
  • Identifying exact application of data for corresponding requirements
  • What are the two main classes of data quality problems identified in the text?

  • Management and Statistics
  • Single-source and Multi-source (correct)
  • Timeliness and Relevance
  • Medicine and Computer Science
  • What is the purpose of classifying data quality problems according to the text?

  • To measure and manage data quality as well as information
  • To identify different fields that address data quality issues
  • To illustrate standard data and identify exact application
  • To illustrate non-standard data and identify exact application (correct)
  • Which of the following is a data quality dimension?

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

    What does the text state is critical for improvement process activity in different fields?

    <p>Quality of data</p> Signup and view all the answers

    Which of the following is NOT mentioned as a definition of data quality?

    <p>Classifying information and data requirements</p> Signup and view all the answers

    What is the primary purpose of data in an organization's operational, tactical and decision-making activities?

    <p>To identify related performance issues</p> Signup and view all the answers

    Which of the following is NOT a data-driven technique for improving data quality?

    <p>Enhancing user experience</p> Signup and view all the answers

    What is the main purpose of the process-driven strategy for improving data quality?

    <p>To redesign the process that produces or modifies the data to improve its quality</p> Signup and view all the answers

    What is the primary difference between data-driven and process-driven techniques for improving data quality?

    <p>Data-driven techniques focus on modifying the data values directly, while process-driven techniques focus on redesigning the processes that produce or modify the data.</p> Signup and view all the answers

    Which of the following is a technique used in the process-driven strategy for improving data quality?

    <p>Process control</p> Signup and view all the answers

    Which of the following is an example of a process redesign technique used in the process-driven strategy for improving data quality?

    <p>Adding an activity to control the format of data before storage</p> Signup and view all the answers

    What does completeness refer to in an information system?

    <p>The ability to represent every meaningful state of the real-world system</p> Signup and view all the answers

    What is accessibility in terms of data quality?

    <p>How easily and quickly information can be retrieved</p> Signup and view all the answers

    Which dimension of data quality focuses on the quality and documentation of data standards and models?

    <p>Data specification</p> Signup and view all the answers

    What is consistent representation in terms of data quality?

    <p>The extent to which data is presented consistently</p> Signup and view all the answers

    Which factor determines the reputation of information?

    <p>The extent to which information is highly regarded in terms of source or content</p> Signup and view all the answers

    What does presentation quality measure in data quality?

    <p>The quality of how information is presented and collected</p> Signup and view all the answers

    Which of the following is the main advantage of the Process-driven technique over the Data-driven technique?

    <p>Process-driven completely removes the root causes of quality problems.</p> Signup and view all the answers

    What is the key difference between elementary data and aggregated data, as described in the text?

    <p>Elementary data represents atomic phenomena of the real world, while aggregated data does not.</p> Signup and view all the answers

    Which type of data is collected from elementary data and involves the application of aggregation functions?

    <p>Aggregated data</p> Signup and view all the answers

    Which of the following statements about the classification of data based on 'strictness to measure and to achieve data quality' is correct?

    <p>The two classes are 'elementary data' and 'aggregated data'.</p> Signup and view all the answers

    Which of the following statements about the 'Data as a Product' model of data classification is correct?

    <p>It classifies data into three types.</p> Signup and view all the answers

    How do Process-driven and Data-driven techniques compare in terms of cost and efficiency over the long run?

    <p>Process-driven is more expensive but more efficient in the long run.</p> Signup and view all the answers

    What does timeliness refer to in the context of data quality?

    <p>The delay between a change in the real world and the corresponding update in the information system</p> Signup and view all the answers

    What are the two components of timeliness mentioned in the text?

    <p>Currency and volatility</p> Signup and view all the answers

    What is the definition of currency according to the text?

    <p>The degree to which a datum is up-to-date</p> Signup and view all the answers

    Which of the following best describes volatility?

    <p>The time period for which information is valid in the real world</p> Signup and view all the answers

    What is the definition of consistency according to the text?

    <p>The extent to which data is presented in the same format and compatible with previous data</p> Signup and view all the answers

    How is accuracy defined in the context of data quality?

    <p>The extent to which data values correspond to real-world values</p> Signup and view all the answers

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