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Q41. 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.
Answer: B
Explanation:
Q42. Which command is used to back out a subset of database changes that have been made within a unit of work?
A. COMMIT
B. ROLLBACK
C. COMMIT TO SAVEPOINT
D. ROLLBACK TO SAVEPOINT
Answer: D
Explanation:
Q43. A table named EMPLOYEE was created as follows:
Which action will prevent unauthorized users from accessing SSN data?
A. Assign the SSN column to a restricted role that only authorized users can access.
B. Only grant ACCESSCTRL authority for the SSN column to users who need to access SSN data.
C. Alter the table definition so that SSN data is stored in a separate schema that only authorized users can access.
D. Create a view for the EMPLOYEE table that does not contain the SSN column and require unauthorized users to use the view.
Answer: D
Explanation:
Q44. Given the following DDL statement: CREATE TABLE sales (item CHAR(20)); If a DBA wishes to increase the size of the ITEM column, which SQL statement needs to be used?
A. ALTER TABLE sales ADD COLUMN item CHAR(40);
B. ALTER TABLE sales ALTER COLUMN item CHAR(40);
C. ALTER TABLE sales MODIFY COLUMN item CHAR(40);
D. ALTER TABLE sales ALTER COLUMN item SET DATA TYPE CHAR(40);
Answer: D
Explanation:
Q45. Which SQL statement will give a user named USER1 the ability to run an embedded SQL application named BENEFITS that calls a package named CORPDATA.PKGA?
A. GRANT EXECUTE ON APPLICATION benefits TO user1
B. GRANT EXECUTE ON PACKAGE corpdata.pkga TO user1
C. GRANT EXECUTE ON APPLICATION PACKAGE corpdata.pkga TO user1
D. GRANT EXECUTE ON APPLICATION benefits USING PACKAGE corpdata.pkga TO user1
Answer: B
Explanation:
Q46. Which statement about BEFORE triggers is FALSE?
A. A BEFORE trigger can be used to perform validation of input data.
B. A BEFORE trigger can be used to automatically generate values for newly inserted rows.
C. A BEFORE trigger is fired for each row in the set of affected rows before the trigger event executes.
D. A BEFORE trigger is fired for each row in the set of affected rows instead of executing the trigger event.
Answer: D
Explanation:
Q47. Which DB2 object can be used to improve the execution performance of qualified SELECT statements?
A. Trigger
B. SQL Procedure
C. Sequence Object
D. Materialized Query Table
Answer: D
Explanation:
Q48. A table named SALES contains a record for every sales transaction a company processes. A user wishes to see the number of transactions that are made by each salesman. Which SQL statement will produce the desired results?
A. SELECT name, COUNT(*) AS transactions FROM sales
B. SELECT name, COUNT(DISTINCT name) AS transactions FROM sales
C. SELECT name, COUNT(*) AS transactions FROM sales GROUP BY name
D. SELECT DISTINCT name, COUNT(*) AS transactions FROM sales GROUP BY transactions
Answer: C
Explanation:
Q49. 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.
Answer: C
Explanation:
Q50. What type of large object (LOB) is used to store LOB data together with the formatted rows on data pages, instead of in a separate LOB storage object?
A. inline
B. binary
C. internal
D. partitioned
Answer: A
Explanation: