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PassLeader Valid 1Z0-485 Dumps with VCE and PDF (Question 21 – Question 25)

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QUESTION 21
Which is a best practice for High Availability (HA) in an Exadata environment?

A.    Checksums performed on the Exadata Storage Server ensure logical consistency of block content.
B.    When a standby database is in place, DB_BLOCK_CHECKING is not required and thus not recommended.
C.    Oracle Exadata Storage Server Software HARD checks operate transparently after enabling DB_BLOCK_CHECKSUM on a database.
D.    Due to the different architecture that Exadata has with storage servers, compared to regular Storage Area Network, DB_LOST_WRITE_PROTECT need not be set.
E.    Stretched RAC is the best alternative for Exadata that combines both HA and DR into one.

Answer: C
Explanation:
Exadata storage cells include Oracle Hardware Assisted Resilient Data (HARD) to provide a unique level of validation for Oracle block data structures such as data block address, checksum. and magic numbers prior to allowing a write to physical disks. HARD validation with Exadata is automatic (setting DB_BLOCK_CHECKSUM is required to enable checksum validation). The HARD checks transparently handle all cases including Oracle ASM disk rebalance operations and disk failures.
Incorrect:
Not A: The checksum is used to validate that a block is not physically corrupt, detecting corruptions caused by underlying disks, storage systems, or I/O systems. Checksums do not ensure logical consistency of the block contents.
Not B: MAA recommends that you set DB_BLOCK_CHECKING=MEDIUM or FULL on the physical standby as a minimum practice to prevent the standby from various logical block corruptions.
Not D: The recommendation is:
* On the primary database: DB_LOST_WRITE_PROTECT=TYPICAL (default TYPICAL on Exadata)
* On the Data Guard Physical Standby Database: DB_LOST_WRITE_PROTECT=TYPICAL
Not E: Protection from a broad range of, but not all disasters. While not a full disaster recovery (DR) solution, an Extended Distance Oracle RAC or Oracle RAC One Node deployment will provide protection from a broad range of disasters. For a full DR protection Oracle recommends deploying an Oracle RAC together with a local and a remote Oracle Data Guard setup as described in the Maximum Availability Architecture (MAA).

QUESTION 22
What is the benefit of bonding the client access network configuration?

A.    Improved performance
B.    Improved reliability
C.    Both improved performance and reliability
D.    A Single Client Access Name (SCAN)
E.    Improved monitoring

Answer: C

QUESTION 23
To guarantee proper cooling, you plan to place perforated floor tiles near your Database Machine. Where, in relation to the cabinet, should they be placed?

A.    On the left side, because the air flow is from left to right
B.    At the back, because the air flow is from back to front
C.    On the right side, because the air flow is from right to left.
D.    At the front, because the air flow is from front to back
E.    Underneath the cabinet, because the air flow is from bottom to top

Answer: D

QUESTION 24
You are asked to enable Write Back Flash Cache for one of your customers X3-2 Full Rack in a rolling fashion. Put the following steps in the right order:
A) Set flashCacheMode to writeback.
B) Inactivate all grid disks and shut down cellsrv.
C) Drop the Flash Cache.
D) Verify that cell for flashcacheMode is writeback.
E) Create the Flash Cache.
F) Start up cellsrv and activate all grid disks.
G) Check grdidksk asmdeactivationoutcome and asmmodestatus for all grid disks to ensure that all grid disks on all cells are set to Yes and online, respectively.

A.    G. B, C, A, F, E, D, and G
B.    G, A, B, C, F, E, D, and G
C.    G, C, B, A, F, E, D, and G
D.    G, E, C, B, F, A, D, and G

Answer: C

QUESTION 25
Which statement is true about the patching features provided in Platinum Services?

A.    Patching services are available for the full software stack up to twice per year.
B.    Patching support includes Exadata, Exalogic, and Database Appliance.
C.    Rolling window and complete down time approaches are two options to patching.
D.    Platinum covers Exadata storage software and firmware patching, but the customer must perform database patching.

Answer: D
Explanation:
– Patch Deployment: Oracle Platinum Services also includes patching services in which Oracle applies patches to covered systems four times (not A) per year via the Oracle Advanced Support Gateway. We work collaboratively with customers to assess, analyze, plan and deploy updates and patches to mitigate risks and complications. Through this continuous improvement, customers can experience greater system performance, availability, and security.
– Oracle Platinum Services provides enhanced support for high availability and performance to Oracle Premier Support customers running certified configurations of Oracle Exadata Database Machine, Oracle Exalogic Elastic Cloud, or Oracle SuperCluster (not B) — at no additional cost.


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