C2090-614

Review 108 C2090-614 practice questions with answer explanations and community insights.

Question 1

Which constraints are used to tell the DB2 Optimizer to consider business rules that are not enforced by the database manager?

  1. Check constraints
  2. Default constraints
  3. Informational constraints
  4. Referential integrity constraints

Question 2

Given the following database design: A Explain plan shows that a broadcast join is being used by a query that joins the DATE_DIM dimension table and the SALES fact table. Which action should be performed to improve query performance?

  1. Create a replicated summary table for the SALES table using the table space TS_REPL.
  2. Create a replicated summary table for the DATE_DIM table using the table space TS_REPL.
  3. Create an index on both the DATE_DIM and the SALES table for the column that is used in the collocated join.
  4. Create a replicated summary table for the SALES table using the table space TS_DIM and create an index on the DATE_DIM table.

Question 3

Which procedure is used to Explain an SQL statement using information obtained from the package cache or the package cache event monitor?

  1. EXPLAIN_FROM_DATA
  2. EXPLAIN_FROM_ACTIVITY
  3. EXPLAIN_FROM_SECTION
  4. EXPLAIN_FROM_CATALOG

Question 4

Which statement about the initiation of parallel I/O is correct?

  1. For list prefetching, each list of data pages is divided into smaller lists according to extent boundaries and assigned to different I/O servers.
  2. For read-ahead prefetching, each list of data pages is divided into smaller lists according to extent boundaries and assigned to different I/O servers.
  3. For sequential prefetching, parallel I/O is initiated when the prefetch size is a multiple of the extent size for a table space. Each prefetch request is divided into smaller requests and assigned to different I/O servers.
  4. For sequential prefetching, parallel I/O is initiated when the extent size is a multiple of the prefetch size for a table space. Each prefetch request is divided into

Question 5

The following message is frequently seen in the DB2 Diagnostics Log file (db2diag.log): MESSAGE: ADM5502W - The escalation of "28581" locks on table "TEST.TABLE1" to lock intent "X" was successful. Which two database configuration parameter settings should be checked? (Choose two.)

  1. LOCKLIST
  2. MAXAPPLS
  3. MAXLOCKS
  4. MAXAGENTS
  5. LOCKTIMEOUT
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