IBM IBM Certified Advanced Database Administrator A2090-610 Questions & Answers

• Question 21:

  Which statement about foreign keys is true?

  A. A table can have only one foreign key.

  B. Foreign keys can only be defined when a table is created.

  C. A foreign key can be defined on a column or a set of columns in a table.

  D. Foreign keys are enforced only during the execution of INSERT statements.

  Correct Answer: C

• Question 22:

  Which type of table is best suited for recording results from application data manipulation that is not required to be persistent?

  A. Base Table

  B. Temporal Table

  C. Transition Table

  D. Temporary Table

  Correct Answer: D

• Question 23:

  What is a function of a table check constraint?

  A. To provide a method of avoiding duplicate entries for a column.

  B. To provide a method of ensuring a column's values are within a specific range.

  C. To ensure that XML columns are properly populated in an associated XML table space.

  D. To enforce relationships between tables by checking the existence of rows in one table against another.

  Correct Answer: B

• Question 24:

  A table named STATES has the following columns: STATE_CD, REGION_CD, and STATE_NAME. Which SQL statement will return the number of states in each region, ordered by number of states?

  A. SELECT state_cd, COUNT(*)FROM statesORDER BY COUNT(*);

  B. SELECT state_cd, COUNT(*)FROM statesGROUP BY state_cdORDER BY state_cd;

  C. SELECT region_cd, COUNT(*)FROM statesGROUP BY state_cdORDER BY COUNT(*);

  D. SELECT region_cd, COUNT(*)FROM statesGROUP BY region_cdORDER BY COUNT(*);

  Correct Answer: D

• Question 25:

  When a user-defined function (UDF) is created and no schema is specified, what schema is used to store the UDF?

  A. The SYSIBM schema.

  B. The SYSFUN schema.

  C. A schema with the name of the UDF.

  D. A schema with the userid of the UDF definer.

  Correct Answer: D

• Question 26:

  Given the following statements:

  

  What will be the result?

  A. Joe Smith

  B. Joe Smith

  C. Joe Smith>DB2

  D. Joe Smith

  Correct Answer: B

• Question 27:

  Which statement about UPDATE processing is FALSE?

  A. The UPDATE statement logs the before and after value of every column it modifies.

  B. A searched UPDATE is used to update one or more rows and a positioned UPDATE is used to update exactly one row.

  C. When the UPDATE statement modifies parent key columns, the value of corresponding foreign key columns are also modified.

  D. The UPDATE statement modifies the values of specified columns in the rows of a table, view, or underlying table(s) of a specified fullselect.

  Correct Answer: C

• Question 28:

  Which statement about system-period temporal tables is true?

  A. They store user-based period information.

  B. They do not have a separate history table.

  C. They can be queried without a time period specification.

  D. They manage data based on time criteria specified by users or applications.

  Correct Answer: C

• Question 29:

  A table named DEPARTMENT contains the following data:

  

  What will happen?

  A. The statement will fail because a subquery cannot be used in an UPDATE statement.

  B. The statement will fail because the result set produced by the subquery will contain more than one row.

  C. The statement will succeed; the last record retrieved by the subquery will be used to provide a WORKDEPT value for the update operation.

  D. The statement will succeed; the first record retrieved by the subquery will be used to provide a WORKDEPT value for the update operation.

  Correct Answer: B

• Question 30:

  Which type of stored procedure is not associated with an external application program?

  A. A Java stored procedure.

  B. A REXX stored procedure.

  C. A native SQL stored procedure.

  D. An external SQL stored procedure.

  Correct Answer: C