Valid Study Material For Oracle 1Z0-066 Exam

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Question No. 1

Which three are prerequisites for enabling Fast-Start Failover? (Choose three.)

Answer: B, D, F

B: You enable the Flashback Mode both on the primary database and on the standby database.

D: In Maximum Availability mode, Fast-Start Failover (FSFO) guarantees that no transaction that has received a commit acknowledgment will be lost during a failover.

Oracle Database 11g FSFO adds support for Maximum Performance mode (async redo transfer), providing the flexibility to trade durability for performance.

F: The Dataguard Broker Observer (Observer) is used when fast start failover is required. Fast start failover is simply an automatic failover to the standby database


Question No. 2

Which two are prerequisites for configuring Transaction Guard in a Data Guard environment? (Choose two.)

Answer: A, B

To use Transaction Guard with an application, you must do the following:

* Grant permission on the DBMS_APP_CONT package to the database users who will call GET_LTXID_OUTCOME:

GRANT EXECUTE ON DBMS_APP_CONT TO ;

* Use an application service for all database work. Create the service using the srvctl command if you are using Oracle RAC, or using the DBMS_SERVICE.CREATE_SERVICE PL/SQL subprogram if you are not using Oracle RAC.

Configure the services for commit outcome and retention. For example:

COMMIT_OUTCOME = TRUE

RETENTION_TIMEOUT =

COMMIT_OUTCOME determines whether transaction commit outcome is accessible after the commit has executed.

References:

https://docs.oracle.com/database/121/ADFNS/adfns_trans_idemp_guard.htm#ADFNS338


Question No. 3

Which two statements are true about block media recovery in a Data Guard environment? (Choose two.)

Answer: B, D

Question No. 4

Your Data Guard environment has a remote physical standby database with real-time query enabled, which is used for reporting, and a logical standby database used for DSS reporting.

Switchovers or failovers are possible due to testing or in case of a disaster.

Clients use local TNSNAMES.ORA files to define connection strings to the database instances.

Which three will prevent clients from connecting to the wrong database instances? (Choose three.)

Answer: C, D, G

Question No. 5

Which four statements are true regarding SQL Apply filters for a logical standby database? (Choose four.)

Answer: A, C, F, G

A: The DDL fires DML triggers defined on the target table. Since the triggered DMLs occur in the same transaction as the DDL, and operate on the table that is the target of the DDL, these triggered DMLs will not be replicated at the logical standby.

C: The SKIP_ERROR Procedure specifies rules regarding what action to take upon encountering errors

F: You can specify rules to prevent application of DML and DDL changes to the specific table.

G: Use the SKIP procedure with caution, particularly when skipping DDL statements. If a CREATE TABLE statement is skipped, for example, you must also specify other DDL statements that refer to that table in the SKIP procedure. Otherwise, the statements will fail and cause an exception. When this happens, SQL Apply stops running.


Question No. 6

Which two are true about the creation of a Data Guard Broker configuration? (Choose two.)

Answer: D, E

D: Create the Broker Configuration

When using Cloud Control, the Add Standby Database wizard can either add an existing (Oracle RAC or non-Oracle RAC) standby database into the configuration or create a new (Oracle RAC or non-Oracle RAC) standby database and add it to the configuration.

E: An Oracle Data Guard configuration must be enabled to be managed or monitored by the broker.

Note: An Oracle Data Guard configuration consists of one primary database and a combination of standby databases and far sync instances that receive redo directly from the primary database. The Oracle Data Guard broker logically groups these primary and standby databases into a broker configuration that allows the broker to manage and monitor them together as an integrated unit.


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