C2090-600

C2090-600 practice questions, page 2 of 3, with answer review and explanations.

Question 6

What is an advantage of using range partitioned tables?

  1. Ability to run utilities against the partitions in parallel
  2. Increased query performance through data partition elimination
  3. Block indexes are much smaller than RID indexes, providing better performance
  4. Table data is automatically and continuously clustered, requiring minimal reorganization

Question 7

A table named MYTABLE contains an XML column and an XML storage object dictionary already exists. What is the effect of enabling compression and then running the command REORG TABLE mytable KEEPDICTIONARY?

  1. All data, both new and existing, will be compressed.
  2. Only new or updated data for XML columns will be compressed.
  3. New and existing XML columns will be compressed but other columns remain unchanged.
  4. Existing data will remain uncompressed because the RESETDICTIONARY option of the REORG command was not used.

Question 8

The DBA has observed that queries executed against SALES table have poor performance. SALES is a compressed table and recently there have been a lot of rows inserted and modified in that table. The DBA has detected that lower performance may be the result of sub-optimal compression dictionary for that table. Which of the following commands should be used to resolve the problem without preventing users from changing data in the SALES table

  1. REORG TABLE sales INPLACE RESETDICTIONARY
  2. REORG TABLE sales INPLACE REBUILDDICTIONARY
  3. REORG TABLE sales ALLOW WRITE ACCESS RESETDICTIONARY
  4. REORG TABLE sales ALLOW WRITE ACCESS REBUILDDICTIONARY

Question 9

If the following SQL statements are executed: CREATE DATABASE testdb AUTOMATIC STORAGE NO; CONNECT TO testdb; CREATE STOGROUP sg1 ON /data1; CREATE STOGROUP ibmstogroup ON /data2; CREATE STOGROUP sg2 ON /data3; Which storage group is the default storage group for the TESTDB database?

  1. SG1
  2. SG2
  3. IBMSTOGROUP
  4. IBMDEFAULTTSG

Question 10

If Secure Sockets Layer is a requirement, which of the following parameters must be set to encrypt data in transit?

  1. Set the DB2COMM registry variable to DB2COMM=SSL
  2. Set the DB2COMM registry variable to DB2COMM=SSL, TCPIP
  3. Set the AUTHENTICATION configuration parameter to DATA_ENCRYPT
  4. Set the AUTHENTICATION configuration parameter to SERVER_ENCRYPT