QUESTION: 5

Examine this query and its output:
Which two statements are true?

The master observer is connected to the database on which the query was executed.
The master observer is currently running on ol7.example.com.
The master observer is not running, but should run on ol7.example.com.
Cats is a bystander database.
The master observer is not connected to the database on which the query was executed.

Answer(s): D,E

Explanation:

D) The database role indicated by FS_FAILOVER_STATUS as BYSTANDER implies that the database is a standby database in the Data Guard configuration. This means the database is neither a primary database nor an active failover target.
E) Since the FS_FAILOVER_OBSERVER_HOST column shows cats, it suggests that this is the host on which the observer would run. However, because the FS_FAILOVER_OBSERVER_PRESENT column is not shown, we cannot definitively state if the observer is currently connected or not. If FS_FAILOVER_OBSERVER_PRESENT is 'YES', the observer is connected, if 'NO', then it's not. In the absence of this column's output, the best assumption based on the available data is that the observer is not connected.
The output shows that the FS_FAILOVER_STATUS is BYSTANDER, which indicates that the database in question is not actively involved in a fast-start failover configuration as a primary or standby. It is in a bystander role, meaning that while it is part of a Data Guard configuration, it is neither a target for failover nor actively participating in failover operations. Additionally, FS_FAILOVER_OBSERVER_HOST shows 'cats', which indicates the host where the observer process is expected to run. However, since there is no information about the observer being present, we can infer that although 'cats' is designated for the observer to run, the observer is not currently connected to this database.

Reference:

Oracle documentation on Data Guard configurations and the V$DATABASE view which provides information about the fast-start failover status and observer host.

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QUESTION: 6

Which three statements are true....... With no Oracle Streams or Goldengate configured?

It is recommended to have them on the...
Only standby databases can write redo....
The LGWR process writes to them on ....
They are required on a logical standby for real-time apply
They are required on a physical standby for real-time apply.
They are required only for synchronous redo transport

Answer(s): C,D,E

Explanation:

C) The LGWR (Log Writer) process is responsible for writing redo entries from the redo log buffer to the online redo log files on the primary database. This is a fundamental process in the Oracle Database architecture, ensuring that all changes made to the database are captured for purposes such as recovery, replication, and high availability.
D) Real-time apply on a logical standby database requires standby redo log files. The standby redo log files are used to store redo data received from the primary database before it is applied to the logical standby database. This enables the logical standby to apply changes as they are received, without waiting for the current redo log file to be archived.
E) Similarly, on a physical standby database, standby redo log files are used for real-time apply. They store redo data from the primary database, allowing the physical standby to apply redo data concurrently as it is received, rather than waiting for redo log files to be archived. This capability is crucial for maintaining a physical standby database that is closely synchronized with the primary database with minimal lag.
These functionalities are integral to Oracle Data Guard configurations and are not dependent on Oracle Streams or Oracle GoldenGate, which are separate technologies for data replication and integration.

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QUESTION: 7

Which THREE statements are true........ open in real time query mode, which becomes a new.

All sessions are disconnected and all
Sessions that are using database links
All current buffers can be retained.
Sessions that have long running queries can be retained.
User sessions and Current Buffers are maintained by default.
User sessions can be retained.

Answer(s): A,C,F

Explanation:

When a physical standby database is opened in real-time query mode, which may be referred to as real-time apply when using Active Data Guard, certain operations can disrupt ongoing sessions. However, with features like Application Continuity and the proper configuration of initialization parameters such as STANDBY_DB_PRESERVE_STATES, user sessions and current buffers may be preserved during role transitions such as a switchover or failover. Specifically, the STANDBY_DB_PRESERVE_STATES parameter can be set to preserve none, all, or only user sessions during such transitions. This ensures that in-flight transactions are not lost and that users do not experience disruptions during the role transitions of a physical standby database.

Reference:

Oracle Data Guard Concepts and Administration
Oracle Database Licensing Information User Manual
Oracle Data Guard Broker User Manual

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QUESTION: 8

Examine the fast-start failover configuration:

A failover may occur if the observer has lost connectivity to the primary database, even if the Fast- Start Failover target standby database has a good connection to the primary database
If South_Sales develops a problem and cannot be the target of a failover, the broker automatically changes the fast-start failover target to one of the other candidate targets.
The observer will initiate a failover when the primary database is unable to produce local archived redo log files.
You must disable fast-start failover first to change the fast-start failover target to East sales.
The observer is running.

Answer(s): A,C,E

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Free Oracle 1Z0-076 Exam Questions (page: 6)

QUESTION: 5

Explanation:

Reference:

QUESTION: 6

Explanation:

QUESTION: 7

Explanation:

Reference:

QUESTION: 8

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