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- Question
A subtype discriminator is which of the following?
Options- A. An attribute of the supertype whose values determine the subtype
- B. An attribute of the subtype whose values determine the supertype
- C. An attribute of the supertype whose values determine the supertype
- D. An attribute of the subtype whose values determine the subtype
- Correct Answer
- An attribute of the supertype whose values determine the subtype
- 1. Which of the following statements is true concerning subqueries?
Options- A. Involves the use of an inner and outer query.
- B. Cannot return the same result as a query that is not a subquery.
- C. Does not start with the word SELECT.
- D. All of the above. Discuss
- 2. When transforming an entity-relationship model into a relational database design, each entity is represented as a table.
Options- A. True
- B. False Discuss
- 3. The document that is used by XSLT to indicate how to transform the elements of the XML document to another format is a(n):
Options- A. HTML page.
- B. DOCTYPE procedure.
- C. stylesheet.
- D. stored procedure. Discuss
- 4. An ideal primary key is short, numeric and seldom changing.
Options- A. True
- B. False Discuss
- 5. Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.
Options- A. True
- B. False Discuss
- 6. XSLT processors evaluate each statement in the context of the match that has been made. That is, XSLT processors are:
Options- A. context oriented.
- B. procedural oriented.
- C. object oriented.
- D. relational oriented. Discuss
- 7. When two transactions are being processed against the database at the same time they are termed concurrent transactions.
Options- A. True
- B. False Discuss
- 8. The XSLT processor copies the elements of the stylesheet until it finds a command in the format:
Options- A. SELECT ... FROM ... WHERE.
- B. {item, action}.
- C. {for-each select}.
- D. <HTML>...<\HTML>. Discuss
- 9. Functional decomposition is the process of breaking down the functions of an organization into greater levels of detail.
Options- A. True
- B. False Discuss
- 10. Whose role is it to determine the requirements and design for a database?
Options- A. Database analysts
- B. Database administrators
- C. Both A and B.
- D. Neither A or B. Discuss
More questions
Correct Answer: Involves the use of an inner and outer query.
Correct Answer: True
Correct Answer: stylesheet.
Correct Answer: True
Correct Answer: False
Correct Answer: context oriented.
Correct Answer: True
Correct Answer: {item, action}.
Correct Answer: True
Correct Answer: Database analysts
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