C2090-612 Exam Questions & Answers

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C2090-612 Exam Questions & Answers

Vendor: IBM

Certifications: IBM Certified Database Administrator

Exam Code: C2090-612

Exam Name: DB2 10 DBA for z/OS

Updated: Jun 29, 2022

Q&As: 134

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C2090-612 Online Practice Questions and Answers

Questions 1

Poorly tuned memory can affect application performance, such as having sequential prefetch turned off. Which statistic should you monitor from the statistics report to be sure this is not occurring?

A. PREF.DISABLED-NO BUFFER

B. PREF.DISABLED-NO READ ENG

C. BUFF.UPDATES/PAGES WRITTEN

D. PAGES WRITTEN PER WRITE I/O

Show Answer
Questions 2

When is a merge scan join a well performing access path?

A. When the number of qualifying rows of the inner and outer table are both large.

B. When the query references at least two dimensions and the STARJOIN subsystem parameter is 1.

C. When the number of rows in the outer table is small and the number of pages accessed in the inner table is small.

D. When the matching columns of the inner table are in a non-clustering index or the outer table has duplicate qualifying rows.

Show Answer
Questions 3

Your current backup strategy is to run COPY SHRLEVEL CHANGE for all your table spaces each night. You create FULL image copies once a week and INCREMENTAL copies during the rest of the days. After migrating to DB2 10, you plan to create the FULL image copies using FLASHCOPY YES and COPYDDN, that is you create a flash copy image copy (FCIC) and additionally a sequential copy. What happens to the incremental copies that you continue to create on all other days?

A. If DSNZPARM FLASHCOPY_COPY is set to YES, the incremental copies will automatically be incremental FLASHCOPY copies.

B. Nothing special. The only difference is that the FULL copy, which is the basis for the subsequent incremental copies has now been generated from the FCIC.

C. The COPY utilities with FULL NO option will not run. If there are entries in SYSIBM.SYSCOPY that indicate that FCICs exist for a give page set, INCREMENTAL copies cannot be taken anymore.

D. The first image copy utility execution after the FULL FCIC and sequential copy created from the FCIC will end up as FULL copy although you specify the FULL NO statement on the COPY utility control statement.

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