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Vendor: IBM
Exam Code: C2090-311
Exam Name: IBM DB2 10.5 DBA for LUW Upgrade from DB2 10.1
Certification Provider: IBM
Total Questions: 30 Q&A
Updated on: Jul 08, 2026
Note: Product instant download. Please sign in and click My account to download your product.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.
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.
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.
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