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quiz 188 aggarwal f08

quiz 188 aggarwal f08 - Namh‘ Student ID 1 Which of the...

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Unformatted text preview: Namh‘ Student ID __._ 1. Which of the following represents the different information granularities? Detail, summary, aggregate B. Document, presentation, spreadsheet, database . Individual, department, enterprise D. None of the above What is immediate, up—to-date information? . Real-time information B. Real-time systems C. Information granularity D. All of the above 3. Which of the following is not one of the five characteristics common to high quality information? A. Accuracy B. Completeness uantity D. Consistency 4. What is it called when each transaction, entity, and event is represented only once in the information? Uniqueness B. Accuracy . Consistency D. Timeliness 5. In the relational database model, what is a person, place, thing, transaction, or event about which information is stored? @Entity B. Relationships C. Attribute D. Foreign Key 6. Why do relational databases use primary keys and foreign keys? A. To create a database B. To create physical relationships @o create logical relationships D. All of the above 7. What is a primary key? @A field (or group of fields) that uniquely identifies a given entity in a table B. A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship among the two tables C. Characteristics or properties of an entity D. A field (or group of fields) that uniquely identifies a given attribute in a table 8. What refers to how well a system can adapt to increased demands? ® Scalability B. Performance . Redundancy D. Information integrity 9. What is information redundancy? A. Duplication of information B. Storing the same information in multiple places C. Storing duplicate info in multiple places @All of the above 10. What directly accesses a database? A. Accounting system users ®DBMS C. Finance system users D. All of the above No. of correct answers 1 O ...
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