Database Systems – Section 4

11. In SQL, which command(s) is(are) used to change a table’s storage characteristics?

A. ALTER TABLE
B. MODIFY TABLE
C. CHANGE TABLE
D. All of the above
E. None of the above

Correct Answer: A. ALTER TABLE

12. In SQL, which of the following is not a data definition language commands?

A. RENAME
B. REVOKE
C. GRANT
D. UPDATE
E. None of the above

Correct Answer: D. UPDATE

13. Subschema can be used to

A. create very different, personalized views of the same data
B. present information in different formats
C. hide sensitive information by omitting fields from the sub¬¨schema’s description
D. All of the above
E. None of the above

Correct Answer: D. All of the above

14. Database management systems are intended to:

A. eliminate data redundancy
B. establish relationships among records in different files
C. manage file access
D. maintain data integrity
E. All of the above

Correct Answer: E. All of the above

15. In SQL, which command(s) is(are) used to issue multiple CREATE TABLE, CREATE VIEW, and GRANT statements in a single transaction?

A. CREATE PACKAGE
B. CREATE SCHEMA
C. CREATE CLUSTER
D. All of the above
E. None of the above ;

Correct Answer: B. CREATE SCHEMA

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