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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q17-Q22):

NEW QUESTION # 17
Which two activities are supported on the storage servers in an Exadata Database Machine?

A. upgrading the Storage Server software package using rpm
B. installing an alternative package manager
C. upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure
D. configuring secure shell user equivalency for the cellmonitor user
E. changing the root password

Answer: A,C

Explanation:
Exadata Database Machine is a preconfigured and optimized for database workloads. The storage servers in an Exadata Database Machine are used to store database data, and support activities such as upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure and upgrading the Storage Server software package using rpm. These activities are related to maintain the storage servers performance and security. Changing the root password, installing an alternative package manager, and configuring secure shell user equivalency for the cellmonitor user are activities that can be performed on any Linux machine, but they are not specific to Exadata Database Machine.

NEW QUESTION # 18
You have been asked to investigate why an Exadata Database Server stopped communicating on the client network for 10 minutes over the past weekend.
Which command would help investigate this?

A. # /opt/oracle.ExaWatcher/GetExaWatcherResults.sh -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
B. # /opt/oracle.SupportTools/exachk/exachk -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
C. $ ${ORACLE_HOME}/suptools/tfa/release/tfa_home/bin/tfact1 -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
D. # /opt/oracle.SupportTools/ibdiagtools/netcheck/runDiagnostics.pm -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

Answer: A

Explanation:
AccordingtoOraclesdocumentationoneoftheutilitiesfordiagnosticsand
Explanation:
repair of Oracle Exadata Storage Server is ExaWatcher, which collects operating system and network metrics on database servers and storage servers. The utility is located in the /opt/oracle.ExaWatcher directory1.
To investigate why an Exadata Database Server stopped communicating on the client network for 10 minutes over the past weekend, you can use the GetExaWatcherResults.sh script to collect and analyze ExaWatcher data for a specified time range1.
Therefore, the command that you should use to investigate this is:
/opt/oracle.ExaWatcher/GetExaWatcherResults.sh -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

NEW QUESTION # 19
Which two of the following network connection types can be deployed on the client network ports of an Exadata X9M-2 Database Server?

A. 2x 25Gb ports on eth1 and eth2 using SFP28 transceivers and OM4 fiber cable for backup network, and 2x 25Gb ports on eth5 and eth6 using SFP28 transceivers and OM4 fiber cable for client network
B. 2x 25Gb ports on eth1 and eth2 using SFP28 transceivers and OM4 fibre cable for client network, and 2x 10Gb ports on eth9 and eth10 using RJ45 cat6 cable for backup network
C. 2x 10Gb ports on eth1 and eth2 using FU45 cat6 cable for client network, and 2x 25Gb ports on eth11 and eth12 using SFP28 transceivers and OM4 fiber cable for backup network
D. 2x 25Gb ports on eth1 and eth2 using SFP28 transceivers and OM4 fiber cable for backup network, and 2x 10Gb ports on eth3 and eth4 using RJ45 cat6 cable for client network

Answer: A,B

Explanation:
https://www.oracle.com/a/ocom/docs/engineered-systems/exadata/exadata-x9m-2-ds.pdf

NEW QUESTION # 20
Which two statements are true about the initial storage configuration after the standard (non-virtualized) deployment of a new Exadata Database Machine with High Capacity storage servers?

A. There is free space available on flashdisks inside the Exadata storage servers to configure Exadata Smart Flash Logs.
B. The DATA_<DBM_Name> and RECO_<DBM_NAME> ASM diskgroups are built on with DATA on the outer-most tracks and RECO on the inner-most tracks of the physical disk.
C. The sparse_<DBM_NAME> diskgroup is created automatically.
D. There is free space available on the hard disks inside the database servers for possible extension of the /uoi file system.
E. There is free space available on flashdisks inside the Exadata storage servers for possible use for storage indexes.

Answer: A,E

Explanation:
According to the Oracle Exadata Database Machine Technical Architecture1, the initial storage configuration after the standard (non-virtualized) deployment of a new Exadata Database Machine with High Capacity storage servers includes two ASM disk groups: DATA_<DBM_Name> and RECO_<DBM_NAME>. These disk groups are built on hard disks and flash disks inside the Exadata Storage Servers1.
The correct statements about this configuration are:
Option D: There is free space available on flashdisks inside the Exadata storage servers for possible use for storage indexes. Storage indexes are a feature of Exadata Storage Software that can improve query performance by avoiding unnecessary I/O operations. Storage indexes use a small amount of flash memory to store metadata about data blocks stored on disk1.
Option E: There is free space available on flashdisks inside the Exadata storage servers to configure Exadata Smart Flash Logs. Exadata Smart Flash Logs are another feature of Exadata Storage Software that can improve database performance by using flash memory as an extension of the database redo log buffer. This can reduce latency and increase throughput for redo log writes1.

NEW QUESTION # 21
Which two statements are true about enabling write-back flash cache?

A. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
B. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
C. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
D. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
E. Before write-back flash cache is enabled, you need to drop the Flash Cache first.

Answer: C,E

Explanation:
The two statements that are true about enabling write-back flash cache are:
When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
Before write-back flash cache is enabled, you need to drop the Flash Cache first.
The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book states that "when enabling write-back flash cache in a rolling manner [1], grid disks need to be inactivated on all cells before enabling write-back flash cache". It also states that "before write-back flash cache can be enabled, the existing flash cache must be dropped".

NEW QUESTION # 22
......

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