Exam Dumps For Oracle 1Z0-066 Exam

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Question No. 1

You must propose an Oracle Data Guard configuration for a database supporting an OLTP workload that meets these permanent requirements:

1. Data loss is not permitted.

2. Read-only applications should not connect to the primary database instance.

Additionally, there are these requirements, only one of which is ever done at any one time:

3. It should be possible to apply and test designated patches with a minimum amount of downtime.

4. Upgrading to a new database release should be performed with the least possible amount of downtime.

5. New application software releases should be tested against an exact up-to-date replica of the production database.

You propose a primary database with one physical standby database configured in Maximum Protection mode.

Which requirements do you meet?

Answer: C

Maximum Protection mode ensures that zero data loss occurs if a primary database fails.

Because this data protection mode prioritizes data protection over primary database availability, Oracle recommends that a minimum of two standby databases be used to protect a primary database that runs in maximum protection mode to prevent a single standby database failure from causing the primary database to shut down.


Question No. 2

Which two are true about the use of RMAN recovery catalogs when offloading backups to a physical standby database? (Choose two.)

Answer: D, E

E: The RMAN recovery catalog is subdivided into multiple virtual recovery catalogs.

D: The following RMAN configurations are recommended at a standby database where backups are not done:

1. Connect RMAN to the standby database as target, and to the recovery catalog.

2. Enable automatic deletion of archived logs once they are applied at the standby database (this is also applicable to all terminal databases when the cascading or far sync instance features are in use)


Question No. 3

Which statement is true regarding Oracle Net connectivity for a Data Guard Broker configuration?

Answer: D

The tnsnames.ora on both Primary as well as Standby sites have entries for the databases.

Note: TNSNAMES.ORA is a SQL*Net configuration file that defines databases addresses for establishing connections to them.

References:

http://gavinsoorma.com/2013/08/minimal-downtime-rolling-database-upgrade-to-12c-release-1/


Question No. 4

Examine the Data Guard configuration:

DGMGRL> show configuration;

Configuration -- Animals

Protection Mode: MaxAvailability

Databases:

dogs - Primary database

sheep - (*) Physical standby database

cats - Physical standby database

Fast-Start Failover: ENABLED

Configuration Status:

SUCCESS

What happens if you issue 'switchover' to sheep;' at the DGMGRL prompt?

Answer: D

Question No. 5

In which two cases is it possible to change the protection mode to maximum protection using Enterprise Manager Cloud Control? (Choose two.)

Answer: B, E

Maximum protection mode requires the SYNC redo transport mode to be set on at least one standby database.

Note:

The Maximum protection mode ensures that no data loss will occur if the primary database fails. To provide this level of protection, the redo data needed to recover a transaction must be written to both the online redo log and to the standby redo log on at least one synchronized standby database before the transaction commits. To ensure that data loss cannot occur, the primary database will shut down, rather than continue processing transactions, if it cannot write its redo stream to at least one synchronized standby database.

References:

http://www.oracle.com/technetwork/oem/framework-infra/wp-em12c-building-ha-level3-1631423.pdf


Question No. 6

Which four database parameters might be affected by or influence the creation of standby databases? (Choose four.)

Answer: A, D, E, F

A: DB_NAME

On a primary database, specify the name used when the database was created. On a physical standby database, use the DB_NAME of the primary database.

C: Ensure the COMPATIBLE initialization parameter is set to the same value on both the primary and standby databases. If the values differ, redo transport services may be unable to transmit redo data from the primary database to the standby databases.

D: DB_FILE_NAME_CONVERT

Specify the path name and filename location of the primary database data files followed by the standby location. This parameter converts the path names of the primary database data files to the standby data file path names.

E: DB_UNIQUE_NAME

Specify a unique name for each database. This name stays with the database and does not change, even if the primary and standby databases reverse roles.

F: FAL_SERVER

Specify the Oracle Net service name of the FAL server (typically this is the database running in the primary role).


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