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- Question
A supertype/subtype hierarchy has which of the following features?
Options- A. Subtypes at the lower lever in the hierarchy inherit attributes only from their immediate supertype.
- B. Attributes are assigned at the highest logical level.
- C. Subtypes at the higher lever in the hierarchy inherit attributes only from their immediate subtype.
- D. Attributes are assigned at the lowest logical level.
- Correct Answer
- Attributes are assigned at the highest logical level.
- 1. Adding null columns to a table is straightforward.
Options- A. True
- B. False Discuss
- 2. The cost to perform a snapshot refresh may depend on whether the snapshot is simple or complex.
Options- A. True
- B. False Discuss
- 3. How many copies of a JSP page can be in memory at a time?
Options- A. One
- B. Two
- C. Three
- D. Unlimited Discuss
- 4. A shared database should:
Options- A. be accurate and available.
- B. provide for backup and recovery.
- C. be secure.
- D. All of the above. Discuss
- 5. Stylesheets are used by XSLT to indicate how to transform the elements of the XML document into another format.
Options- A. True
- B. False Discuss
- 6. Most operational systems are based on the use of transient data.
Options- A. True
- B. False Discuss
- 7. An extranet is which of the following?
Options- A. The use of Internet protocols with limited access to company data by the company's customers and suppliers.
- B. The use of Internet protocols with unlimited access to company data by the company's customers and suppliers.
- C. The use of Internet protocols with limited access to company data by people within an organization.
- D. The use of Internet protocols with unlimited access to company data by people within an organization. Discuss
- 8. In OLAP, we are interested in ________ .
Options- A. levels only
- B. dimensions only
- C. measures only
- D. measures and dimensions Discuss
- 9. A database management system (DBMS) is a:
Options- A. hardware system used to create, maintain, and provide controlled access to a database.
- B. hardware system used to create, maintain, and provide uncontrolled access to a database.
- C. software system used to create, maintain, and provide controlled access to a database.
- D. software system used to create, maintain, and provide uncontrolled access to a database. Discuss
- 10. Which of the following indicates the minimum number of entities that must be involved in a relationship?
Options- A. Minimum cardinality
- B. Maximum cardinality
- C. ERD
- D. Greater Entity Count (GEC) Discuss
More questions
Correct Answer: True
Correct Answer: True
Correct Answer: One
Correct Answer: All of the above.
Correct Answer: True
Correct Answer: True
Correct Answer: The use of Internet protocols with limited access to company data by the company's customers and suppliers.
Correct Answer: measures and dimensions
Correct Answer: software system used to create, maintain, and provide controlled access to a database.
Correct Answer: Minimum cardinality
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