Braindumps For Oracle 1Z0-066 Exam

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Question No. 1

Which two are true about management of a far sync instance when using the Data Guard Broker? (Choose two.)

Answer: A, B

A: ADD FAR_SYNC

Adds an existing far sync instance to an Oracle Data Guard broker configuration.

The far sync instance is disabled after creation. You must explicitly enable it before the broker can ship redo to and from it.

B: A far sync instance that has its RedoRoutes property set cannot be disabled.


Question No. 2

Your expertise is requested for these customer requirements:

1. The Data Guard environment must be in maximum protection mode.

2. Reports must be offloaded to a physical standby database.

3. There must be no lag between the primary and standby databases that affect the reports produced.

4. The primary database must be resilient in case of a single network failure.

Which solution is correct for these requirements?

Answer: B

If STANDBY_MAX_DATA_DELAY is set to 0, a query issued to a physical standby database is guaranteed to return the exact same result as if the query were issued on the primary database, unless the standby database is lagging behind the primary database, in which case an ORA-3172 error is returned.

Real-time Query Restrictions include:

The standby database must receive redo data via the SYNC transport.

Note: In an Active Data Guard environment, this session parameter can be used to specify a session-specific apply lag tolerance, measured in seconds, for queries issued by non-administrative users to a physical standby database that is in real-time query mode.


Question No. 3

Which three are true about the use of the VALID_FOR clause of the LOG_ARCHIVE_DEST_N parameter, in determining whether archive logs should be written to a particular destination by a database in a Data Guard environment? (Choose three.)

Answer: A, D, E

Question No. 4

Which two are prerequisites for configuring flashback database for Oracle 12c databases, in a Data Guard environment? (Choose two.)

Answer: A, C

Configure the following database settings before enabling Flashback Database:

You must have a fast recovery area enabled, because flashback logs can only be stored in the fast recovery area.

Your database must be running in ARCHIVELOG mode, because archived logs are used in the Flashback Database operation.

For Oracle Real Application Clusters (Oracle RAC) databases, the fast recovery area must be in a clustered file system or in ASM.


Question No. 5

You are required to change the Data Guard Configuration protection mode from MAXPERFORMANCE to MAXAVAILABILITY using Enterprise Manager Cloud Control.

Which two are true about this change? (Choose two.)

Answer: B, C

Maximum Availability

This protection mode provides the highest level of data protection that is possible without compromising the availability of a primary database. Transactions do not commit until all redo data needed to recover those transactions has been written to the online redo log and to at least one synchronized standby database.

If the primary database cannot write its redo stream to at least one synchronized standby database, it operates as if it were in maximum performance mode to preserve primary database availability until it is again able to write its redo stream to a synchronized standby database.


Question No. 6

Which three are true regarding the Enterprise Manager Cloud Control Data Guard configuration verification wizard? (Choose three.)

Answer: A, B, C

Usually Data Guard configuration verification is kind of health check of Data Guard, it does many things like performing complete health check, verifying the FSFO status, determination of protection mode, availability of standby redo log files, Data Guard status whether valid or not, After the log switch whether the sequence is shipping to standby or not and Data Guard properties. To initiate Data Guard verification Navigation is "Availability --> Verify Data Guard Configuration".

References:

http://www.toadworld.com/platforms/oracle/w/wiki/11149.monitoring-troubleshooting-data-guard-using-em12c


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