IBM C2090-558 Exam Questions

Question 6 of 120

Under which of the following conditions does the LAST COMMITTED option have an effect on the COMMITTED READ isolation level?

Row level lock

Page level locking

RAW or unlogged tables

Tables containing complex data types

Correct Answer: A

Question 7 of 120

You have a database server environment where all databases use buffered logging. In which two conditions are the logical-log buffers in shared memory flushed to the logical log on disk? (Choose two.)

When the buffer is full.

When a checkpoint occurs.

When a user issues a begin work.

When a user commits the transaction.

When a user rolls back the transaction.

Correct Answer: A, B

Question 8 of 120

What are two ways to create table t1 with row level locking? (Choose two.)

Execute the command "create table t1 (c1 int) locking row".

Execute the command "create table t1 (c1 int) lock level row".

Execute the command "create table t1 (c1 int) lock mode row".

Set DEF_TABLE_LOCKMODE to ROW in ONCONFIG before executing "create table t1(c1 int)".

Set the environment variable DEF_TABLE_LOCKMODE to ROW before executing "create table t1(c1 int)".

Correct Answer: C, D

Question 9 of 120

Why would you want to create a table with a lock mode row as opposed to a lock mode page?

to reduce disk I/O

to keep more information in memory for each locked row

to increase concurrency among multiple users on the same table

to reduce the number of locks when accessing rows out of the table

Correct Answer: C

Question 10 of 120

Which isolation level is appropriate if you do not want your query to place any locks?

Dirty Read

Cursor Stability

Committed Read

Repeatable Read

Correct Answer: A