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IBM Assessment: DB2 9 Family Fundamentals Sample Questions:

1. Application A holds an Exclusive lock on table TAB1 and needs to acquire an Exclusive lock on table TAB2. Application B holds an Exclusive lock on table TAB2 and needs to acquire an Exclusive lock on table TAB1. If lock timeout is set to -1 and both applications are using the Read
Stability isolation level, which of the following will occur?

A) Application B will be placed in a lock-wait state until ApplicationA releases its lock
B) Application B will read the data in table TAB1 and see uncommitted changes made by Application A
C) Application B will read the copy of table TAB1 that was loaded into memory when Application A first read it
D) Applications A and B will cause a deadlock situation

2. A sequence was created with the DDL statement shown below:
CREATE SEQUENCE my_sequence CACHE 10 ORDER
The following statements are successfully executed in sequence through separate database connections:
CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar CONNECTION2 - VALUES NEXT VALUE FOR my_sequence INTO :con2hvar CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar
What is the current value of the :con1hvar host variable?

A) 3
B) 11
C) 30
D) 2

3. Which of the following products is allowed to access other DB2 servers, but cannot accept requests from other remote clients?

A) DB2Enterprise Server Edition
B) DB2 Workgroup Server Edition
C) DB2 Data Warehouse Edition
D) DB2 Personal Edition

4. Given the following ALTER SEQUENCE statement: ALTER SEQUENCE myseq RESTART WITH 0 INCREMENT BY 1 NO MAXVALUE CACHE 5 ORDER Assuming that the sequence had reached a value of 100 prior to the RESTART, which of the following is true?

A) The next value will be 101 to ensure uniqueness between existing and newly generated sequence values.
B) Previously cached values are retained by DB2, and after the restart, will be used for values 101 to 105.
C) The next value will be 0 and DB2 will not ensure uniqueness between existing and newly generated values.
D) The next value will be 0 and the sequence will never use the values 101 to 105.

5. Which of the following can be used to ensure that once a row has been inserted in table TABLEX, the column MAINID in that row cannot be updated?

A) Define the column MAINID as a PRIMARY KEY.
B) Define the column MAINID as NOT UPDATABLE.
C) Define an UPDATE trigger on table TABLEX.
D) Define the column MAINID as a FOREIGN KEY.

Solutions: