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IBM DB2 9 Family Fundamentals Sample Questions:

1. Application A is running under the Repeatable Read isolation level and holds an Update lock on table TAB1. Application B wants to query table TAB1 and cannot wait for Application A to release its lock. Which isolation level should Application B run under to achieve this objective?

A) Cursor Stability
B) Read Stability
C) Uncommitted Read
D) Repeatable Read

2. On which two of the following database objects may the SELECT privilege be controlled?

A) Sequence
B) View
C) Index
D) Schema
E) Nickname

3. Which of the following causes a lock that is being held by an application using the Cursor Stability isolation level to be released?

A) The row the cursor is on is deleted by the application
B) The row the cursor is on needs to be updated by another application
C) The row the cursor is on is deleted by another application
D) The cursor is moved to another row

4. Given the following statement:
SELECT hyear, AVG(salary)
FROM (SELECT YEAR(hiredate) AS hyear, salary
FROM employee WHERE salary > 30000)
GROUP BY hyear
Which of the following describes the result if this statement is executed?

A) The statement will return the year and average salary for all years that every employee hired had a salary greater than $30,000.
B) The statement will return the year and average salary for all years that any employee had a salary greater than $30,000.
C) The statement will return the year and average salary for all employees hired within a given year that have a salary greater than $30,000.
D) The statement will return the year and average salary for all employees that have a salary greater than $30,000, sorted by year.

5. Given the following table:
TAB1
COL1 COL2
A 10 B 20 C 30
D 40
E 50
And the following SQL statements:
DECLARE c1 CURSOR WITH HOLD FOR
SELECT * FROM tab1 ORDER BY col_1;
OPEN c1;
FETCH c1;
FETCH c1;
FETCH c1;
COMMIT;
FETCH c1;
CLOSE c1;
FETCH c1;
Which of the following is the last value obtained for COL_2?

A) 40
B) 30
C) 20
D) 50

Solutions: