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IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

1. Which of the following describes the model used by the Geodetic Extender?

A) 3-D Square
B) Round earth
C) Flat earth
D) Trapezoidal

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

3. Given that tables T1 and T2 contain the following rows:
Table T1: C1 C2
5 4 5 2 5 5 Table T2: C1 C2
5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2 ?

A) SELECT * FROM T1 NOT EXISTS SELECT * FROM T2
B) SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1
C) SELECT * FROM T1 EXCEPT SELECT * FROM T2
D) SELECT * FROM T1 MINUS SELECT * FROM T2

4. Given the following table definitions:
EMPLOYEES
EMPID INTEGER
NAME CHAR(20)
DEPTID CHAR(3)
SALARY DECIMAL(10,2)
COMMISSION DECIMAL(8,2)
DEPARTMENTS
DEPTNO INTEGER DEPTNAME CHAR(20)
Which of the following statements will produce a result data set that satisfies all of these conditions:
> Displays the total number of employees in each department >> Displays the corresponding department name for each department ID >> Sorted by department employee count, from greatest to least

A) SELECT *,COUNT(empno) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2 DESC
B) SELECTdeptname, COUNT(empno) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2 ASC
C) SELECTdeptname, COUNT(*) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2
D) SELECTdeptname, COUNT(empno) FROM departments, employees WHERE deptid = deptno GROUP BY deptname ORDER BY 2 DESC

5. If DB2 detects a deadlock between application A and application B (each waiting for a lock held by the other one), what action will DB2 take?

A) Rollback the transaction in both applications.
B) Rollback the transaction in one of the two applications.
C) Send a message to let the administrator know of the situation and decide which application or applications should be terminated.
D) Decrease the lock timeout value for both applications, thereby causing a lock timeout situation.

Solutions: