IBM DB2 11.1 DBA for LUW

Here you have the best IBM C2090-600 practice exam questions

You have 55 total questions to study from
Each page has 5 questions, making a total of 11 pages
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This questions were last updated on November 16, 2024

Question 1 of 55

Assuming no database connections exist, which of the following will dynamically change the LOCKLIST database configuration parameter for a database named

SAMPLE to AUTOMATIC?

UPDATE DB CFG FOR sample USING LOOCKLIST AUTOMATIC IMMEDIATE

UPDATE DB CFG FOR sample USING LOOCKLIST 8192 AUTOMATIC IMMEDIATE

CONNECT TO sample; UPDATE DB CFG FOR sample USING LOCKLIST AUTOMATIC IMMEDIATE; CONNECT RESET;

ATTACH TO db2inst1; UPDATE DB CFG FOR sample USING LOCKLIST AUTOMATIC;

Correct Answer: D

To dynamically change the LOCKLIST database configuration parameter for a database, you must ensure that the database is connected or the instance is attached. The correct command syntax for this operation is 'UPDATE DB CFG FOR sample USING LOCKLIST AUTOMATIC'. Since no database connections exist as per the question, attaching to the instance (db2inst1) and then updating the database configuration parameter would be the appropriate approach. Therefore, the best choice is to attach to the instance and then run the update command.

Question 2 of 55

Which two tasks must be done to read data directly from IBM Softlayer Object Storage and insert it into a DB2 database? (Choose two.)

Catalog a storage access alias in the DB2 database

Create an FTP account on IBM Softlayer Object Storage

Use the DB2REMOTE parameter of the LOAD command

Establish a remote connection to IBM Softlayer Object Storage using DB2 Connect

Create a local disk alias at the database server operating system level that points to IBM Softlayer Object Storage

Correct Answer: A, C

To read data directly from IBM Softlayer Object Storage and insert it into a DB2 database, two tasks must be performed. First, cataloging a storage access alias in the DB2 database is necessary to create an alias for accessing remote storage, which includes storing remote storage account credentials securely. Second, using the DB2REMOTE parameter of the LOAD command allows specifying a remote storage location, facilitating the direct access and manipulation of data stored on IBM Softlayer Object Storage.

Question 3 of 55

Which of the following statements about compression for BLU MPP tables is TRUE?

Compression must be explicitly enabled for BLU MPP tables

Compression requires decompression to evaluate partition joins

Unique compression dictionaries are generated for each partition

Each table has a single compression dictionary that gets replicated across all partitions

Correct Answer: D

Each table has a single compression dictionary that gets replicated across all partitions. This ensures that data consistency is maintained across partitions without requiring decompression when transferring data between partitions.

Question 4 of 55

A production database has the following daily midnight backup schedule which includes all table spaces. The database incurs the same volume of daily activity

(inserts, updates, and deletes).

Sunday Delta -

Monday Incremental -

Tuesday Delta -

Wednesday Delta -

Thursday Incremental -

Friday Delta -

Saturday Full -

Which day would you expect a RECOVER DATABASE following that days backup to take the longest time to complete?

Friday

Monday

Saturday

Wednesday

Correct Answer: A

Recovering from a Delta backup requires restoring from the most recent full or incremental backup plus the delta backups since then. On Wednesday, recovery would involve restoring the Saturday full backup, the Monday incremental backup, and the delta backups from Tuesday and Wednesday. This makes Wednesday the day with the longest recovery time due to the cumulative restoration process from multiple preceding backups.

Question 5 of 55

Which statement about NOT ENFORCED unique constraints is TRUE?

NOT ENFORCED unique constraints can not be defined on primary key columns

The query optimizer will consider a NOT ENFORCED unique constraint when selecting an optimal data access plan

When attempting to insert data that does not conform to a NOT ENFORCED unique constraint, a warning will be returned

Storage requirements for a NOT ENFORCED unique constraint are no different than the storage requirements for a similar unique index

Correct Answer: B

NOT ENFORCED unique constraints are informational constraints that help the query optimizer to select an optimal data access plan. Although they are not enforced, they provide valuable information to the optimizer about the uniqueness of the data, which can influence the selection of an optimal access plan.