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IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

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

2. Which of the following is a characteristic of a schema?

A) Foreign key references cannot cross schema boundaries.
B) A schema enables the creation of multiple objects in a database without encountering namespace collisions.
C) A DB2 user must be created before a schema with the same name can be created.
D) If no schema is specified when an object is created, the default schema PUBLIC is used.

3. Which of the following DB2 data types CANNOT be used to create an identity column?

A) NUMERIC
B) SMALLINT
C) DOUBLE
D) INTEGER

4. Which of the following is NOT a characteristic of a unique index?

A) A unique index cannot be created for a populated table if the key column specified contains more than one NULL value
B) Each column in a base table can only participate in one uniqueindex, regardless of how the columns are grouped (the same column cannot be used in multiple unique indexes)
C) A unique index can only be created for a non-nullable column
D) In order for an index to be used to support a unique constraint, it must have been defined with the UNIQUE attribute

5. Which of the following is NOT true about schemas?

A) The value assigned to the CURRENT SCHEMA special register is persistent across database restarts
B) When most database objects are created, they are either implicitly or explicitly assigned to a schema
C) A schema enables the creation of multiple objects in a database without encountering namespace collisions
D) If a schema name is not specified, either by qualifying a database object name or by executing the SET CURRENT SCHEMA statement, the authorization ID of the current session user is used as the schema name by default

Solutions: