IBM IBM Certified Database Administrator C2090-311 Questions & Answers

• Question 1:

  Which type of compression is NOT provided as part of the DB2 Storage Optimization Feature?

  A. Row compression

  B. Index compression

  C. Backup compression

  D. Temporary table compression

  Correct Answer: C

• Question 2:

  Which scenario does NOT require intraquery parallelism?

  A. The execution of the LOAD command against an empty column-organized table.

  B. A DML operation that references a populated column-organized table.

  C. The execution of the RUNSTATS command against a populated column-organized table.

  D. The addition of a primary key constraint to an empty column-organized table.

  Correct Answer: D

• Question 3:

  Which statement regarding NOT ENFORCED unique constraints is true?

  A. NOT ENFORCED unique constraints enforce uniqueness only for primary key columns.

  B. The query optimizer will consider a NOT ENFORCED unique constraint when selecting the optimal data access plan.

  C. Storage requirements for NOT ENFORCED unique constraints are identical to storage requirements for a unique index.

  D. When attempting to insert data that does not conform to the NOT ENFORCED unique constraint, an error will be returned and the record will not be inserted.

  Correct Answer: A

• Question 4:

  What type of table can be converted into a column-organized table with the db2convert command?

  A. A range partitioned table

  B. A materialized query table

  C. A row-organized user table

  D. A declared global temporary table

  Correct Answer: A

• Question 5:

  When can a high availability disaster recovery (HADR) role switch operation be performed in a DB2 pureScale environment?

  A. When crash recovery is occurring on the standby cluster.

  B. When all the log streams are in peer or assisted remote catchup state.

  C. When the primary database is not connected to the standby database.

  D. All the log streams are in remote catchup state and the synchronization mode is NEARASYNC.

  Correct Answer: D

• Question 6:

  What happens when the STATISTICS USE PROFILE option is provided with a LOAD command that will be used to populate a column-organized table and a statistics profile does not exist?

  A. A warning is returned and no statistics are collected.

  B. An error is returned and the table is placed in "load pending" state.

  C. A statistics profile is automatically generated before the load is allowed to continue.

  D. The Load utility uses the same RUNSTATS command options as those used during an automatic runstats operation.

  Correct Answer: C

• Question 7:

  When the DB2_COMPATIBILITY_VECTOR registry variable is set to ORA, what is the maximum row width size for database tables?

  A. 32 KB

  B. 64 KB

  C. 1MB

  D. 2 MB

  Correct Answer: B

• Question 8:

  Which monitoring function can be used to determine how many times an SQL statement has referenced a particular column-organized table within a specific period of time?

  A. MON_GET_TABLE()

  B. MON_GET_TABLESPACE()

  C. MON_GET_UNIT_OF_WORK()

  D. MON_GET_TABLE_USAGE_LIST()

  Correct Answer: A

• Question 9:

  If Self Tuning Memory Manager (STMM) is enabled for a DB2 10.5, FixPack 1 pureScale database, which two capabilities are available?

  A. Multi-tenancy

  B. Workload consolidation

  C. Independent tuning member

  D. Broadcasting STMM tuning decisions to all members

  E. Single INSTANCE_MEMORY instance configuration memory setting

  Correct Answer: DE

• Question 10:

  What are the correct steps to capture EXPLAIN information for column-organized tables?

  A. 1. Issue the query against column-organized tables

  2. Execute the db2exfmt command

  B. 1. Execute the command CURRENT EXPLAIN MODE YES

  2.

  Issue the query against column-organized tables

  3.

  Execute the db2exfmt command

  C. 1. Set the ENABLE_COLUMN_TABLES registry variable to YES

  2.

  Issue the query against column-organized tables

  3.

  Execute the db2exfmt command

  D. 1. Set the ENABLE_COLUMN_TABLES registry variable to YES

  2.

  Execute the command CURRENT EXPLAIN MODE YES

  3.

  Issue the query against column-organized tables

  4.

  Execute the db2exfmt command

  Correct Answer: D