IBM IBM Certified Database Administrator C2090-311 Questions & Answers

• Question 11:

  When does space reclamation for a column-organized table normally occur?

  A. Whenever an individual row is deleted.

  B. Whenever an individual row is updated.

  C. After all rows in an extent have been updated.

  D. After all rows in an extent where updates took place have been deleted.

  Correct Answer: A

• Question 12:

  An expression-based index named EMPJND1 and a statistical view named EMP_IND1_V have been created for a table named EMPLOYEE.

  If the following command is used to set up a statistics profile on the statistical view EMP_IND1_V:

  RUNSTATS ON VIEW emp_ind1_v WITH DISTRIBUTION DEFAULT UM_FREQVALUES 50 SET PROFILE ONLY

  Which command will create a statistics profile on the EMPLOYEE table?

  A. RUNSTATS ON TABLE employee USE PROFILE

  B. RUNSTATS ON TABLE employee USE SAMPLED INDEX emp_ind1

  C. RUNSTATS ON TABLE employee WITH DISTRIBUTION AND SAMPLED DETAILED INDEXES ALL

  D. RUNSTATS ON TABLE employee WITH DISTRIBUTION AND SAMPLED INDEX emp_ind1 GENERATE PROFILE

  Correct Answer: C

• Question 13:

  In which type of database are column-organized tables supported?

  A. Partitioned databases.

  B. DB2 pureScale databases.

  C. Databases whose code set is Unicode.

  D. Databases whose code set is Non-Unicode.

  Correct Answer: A

• Question 14:

  Which statement about expression-based indexes is true?

  A. The RUNSTATS command cannot be used to collect statistics for expression-based indexes.

  B. Expression-based indexes must always be defined as UNIQUE to prevent duplicate index keys.

  C. Expression-based index keys consist of a concatenation of one or more specified table columns.

  D. The index key values of expression-based indexes are not the same as the values in the corresponding table columns.

  Correct Answer: D

• Question 15:

  What will cause the creation of a column-organized table to fail?

  A. Setting the database code set to UNICODE.

  B. Setting the DFT_DEGREE database configuration parameter to ANY.

  C. Setting the AUTO_RUNSTATS database configuration parameter to ON.

  D. Setting the UTILJHEAP_SZ database configuration parameter to at least 1.000,000 pages.

  Correct Answer: C

• Question 16:

  Which two HADR synchronization modes are supported in DB2 10.5 pureScale environments?

  A. SYNC

  B. ASYNC

  C. NEARSYNC

  D. SUPERSYNC

  E. SUPERASYNC

  Correct Answer: BC

• Question 17:

  Which statement about Explicit Hierarchical Locking (EHL) for DB2 pureScale is true?

  A. EHL is enabled by default in DB2 10.5 pureScale environments.

  B. There are three EHL states available: SHARED, DIRECT_ACCESS and NONSHARED.

  C. Only regular tables, temporary tables, and non-partitioned indexes can take advantage of EHL.

  D. EHL is designed to improve DB2 pureScale performance by avoiding CF communications for tables that are accessed from only one member.

  Correct Answer: A

• Question 18:

  What is a DB2 Advanced Copy Services (ACS) script used for?

  A. To install and configure DB2 Advanced Copy Services.

  B. To redirect Tivoli Storage FlashCopy Manager commands to DB2 Advanced Copy Services.

  C. To test the functionality of a DB2 ACS API vendor library without performing a snapshot backup or restore operation.

  D. To perform snapshot backup and restore operations on storage devices that do not have a DB2 ACS API vendor library.

  Correct Answer: C

• Question 19:

  Which command would be used to finish a rolling FixPack update to a two member DB2 pureScale cluster?

  A. db2iupdt-a

  B. db2iupdt-update

  C. db2iupdt-commit_level

  D. db2iupdt-online_update

  Correct Answer: B

• Question 20:

  What does the monitor element POOL_FAILED_ASYNC_TEMP_COL_REQS track?

  A. The number of times an attempt to queue a column-organized prefetch request for temporary table spaces was made but failed.

  B. The number of times a temporary error occurred while trying to queue a column-organized prefetch request for a regular table space.

  C. The number of times DB2 had to retrieve a page from disk for a temporary column-organized table because the page no longer resided in the buffer pool.

  D. The number of times an asynchronous read request failed when attempting to read temporary column-organized data from the buffer pool after the page had been flushed to disk.

  Correct Answer: B