READ Free Dumps For IBM- C2090-612

Question ID 20498	When is a merge scan join a well performing access path?
Option A	When the number of qualifying rows of the inner and outer table are both large.
Option B	When the query references at least two dimensions and the STARJOIN subsystem parameter is 1.
Option C	When the number of rows in the outer table is small and the number of pages accessed in the inner table is small.
Option D	When the matching columns of the inner table are in a non-clustering index or the outer table has duplicatequalifying rows.
Correct Answer	A

Explanation

Question ID 20499	The billing application has a DB2 referential integrity setof three tables. TABA, TABB and TABC. Daily, Full Image copies are done for the three table spaces related to the three tables. There is a requirement to recover the three table spaces to noon time, which is about 8 hours after the full image copies were run. Which one of the following statements is true about this recovery situation?
Option A	Recovery will need to be done on the children table first.
Option B	No recovery is allowed since the tables have been updated.
Option C	No recovery is allowed, a QUIESCE utility is missing to create a point of consistency.
Option D	BSDS contains information useful to find an appropriate RBA to use for the TORBA value.
Correct Answer	D

Explanation

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