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IBM Information Management DB2 10.5 pureScale Technical Mastery Test v3 Sample Questions:

1. Consider the scenario where two members, "M1" and "M2", intend to update two different rows on the same data page: 1."M1" is doing an update on row R1 within a data page. It is granted exclusive access to the page containing that row of data. 2."M2" requires an exclusive lock to the same page to update row R2. It passes this request to the cluster caching facility. "M2" waits while the request is processed. 3.The cluster caching facility sees that member "M1" already has an exclusive access to the page. It issues a request to "M1" for the page. In the meantime, "M2" waits. 4."M1" processes the request by writing the page back to the global buffer pool and then releasing the page lock. ("M1" retains any row or table locks it might have had). 5.The cluster caching facility grants "M2" access to the page. "M2" reads the page from the global buffer pool to perform whatever operations for which the page is needed. Which of the following DB2 pureScale monitoring elements can be used to monitor the above scenario?

A) Log Retain.
B) Lock contention.
C) Page reclaiming.
D) Lock escalation.

2. Which of the following statements is INCORRECT regarding backup operations in a DB2 pureScale environment?

A) A backup operation can be performed even if one member is inconsistent.
B) Issuing a single backup/restore database command on any member initiates a backup or restore operation on behalf of all members.
C) Database metadata and transaction logs from the members are not included in the backup image.
D) Only one backup image is produced for the entire cluster.

3. What is the purpose of the Self Tuning Memory Manager (STMM) in DB2?

A) This feature detects memory expansion in the database and delivers a warning to the DBA to let them know when the database is nearing a threshold memory allocation limit.
B) This feature reduces the task of configuring your DB2 server by continuously updating memory configuration parameters, resizing buffer pools, and dynamically determining the total amount of memory to be used by the database.
C) The purpose of this feature is for the system to deliver to you a report of database tuning recommendations so that you can update the configuration parameters by hand.
D) STMM allows DBAs to inspect the current memory allocation by buffer pools.

4. Which of the following options justifies why you should be actively monitoring buffer pool hit ratios on your DB2 pureScale environment?

A) Attaining high local buffer pool (LBP) and global buffer pool (GBP) hit ratios are in general an indication of overall good performance as more pages are found in memory than having to fetch from I/O.
B) Low local buffer pool (LBP) hit ratios are the only important metric that must be monitored since it indicates that there are a higher number pages fetched directly from physical storage than from the local buffer pool.
C) Attaining low local buffer pool (LBP) and global buffer pool (GBP) hit ratios are in general an indication of overall good performance as more pages are found in memory than having to fetch from I/O.
D) High local buffer pool (LBP) hit ratios are the only important metric that must be monitored since it indicates that there are a higher number of pages fetched from physical storage than from the local buffer pool.

5. Where is data stored in a typical DB2 pureScale environment?

A) Data is split among both, members and a shared storage.
B) Data is permanently stored in the cluster caching facility.
C) All members hold a local data partition of the database.
D) In a shared storage accessible by all members.

Solutions: