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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q49-Q54):

NEW QUESTION # 49
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

A. OECA facilitates PDU power selection initially and after equipment addition.
B. OECA extends the hardware for the elastic configuration only.
C. OECA reconfigures the size of disk groups and recreates grid disks.
D. OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.
E. OECA allows one XT storage server in the configuration.

Answer: D,E

NEW QUESTION # 50
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

A. ASR Manager must be installed and configured on one of the database servers.
B. ASR Manager opens a service request (SR) automatically after sensors detect hardware faults.
C. ASR can upload configuration metadata to support problem resolution.
D. Configuring ASR is mandatory for all Database Machine assets.
E. ASR Manager must be installed and configured on a dedicated server external to the Database Machine.
F. ASR communicates with Oracle support services using HTTPS.

Answer: B,C

Explanation:
1. ASR can upload configuration metadata to support problem resolution1.
2. ASR Manager opens a service request (SR) automatically after sensors detect hardware faults1
https://docs.oracle.com/cd/E37710_01/doc.41/e23333/toc.htm

NEW QUESTION # 51
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

A. Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.
B. When backing up multi-rack systems, sharing Exadata X9M switches is recommended.
C. ZFS Snapshots can provide rapid cloning of development and test environment.
D. ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.

Answer: B,D

Explanation:
1. ZFS Storage Appliance (ZFSSA) can't connect directly to the Exadata 100Gb RoCE network switches. ZFSSA uses Fibre Channel protocol to connect to the Exadata storage cells. C. When backing up multi-rack systems, sharing Exadata X9M switches is not recommended. Each rack should have its own switches to minimize the risk of data loss due to switch failure.

NEW QUESTION # 52
An Exadata storage server physical disk on an X9M-2 high-capacity full rack entered the predictive failure state. Which two steps must you perform to replace this failed physical disk?

A. Add the griddisks back into the ASM diskgroup they used to be a member of.
B. Rebalance the data on the effected griddisks before performing a manual drop command.
C. Verify that the griddisks located on the physical disk have been successfully dropped from the associated ASM diskgroups.
D. Create a new celldisk and new griddisks on the replaced physical disk.
E. Replace the failed physical disk.
F. Identify the griddisks located on the failed physical disk and drop them from the associated ASM diskgroups.

Answer: E,F

Explanation:
Once the physical disk has been replaced, you will need to create a new celldisk and griddisks on the replaced physical disk. After the griddisks have been dropped from the associated ASM diskgroups, you can then add the griddisks back into the ASM diskgroup they used to be a member of and rebalance the data on the effected griddisks. Finally, you should verify that the griddisks located on the physical disk have been successfully dropped from the associated ASM diskgroups.

NEW QUESTION # 53
You want to monitor how a large production table is accessed. Especially, you are interested to see how the access on that particular table leverages the benefits of the Exadata Platform.
Which two actions are NOT appropriate for that purpose?

A. You query v$segment_statistics and filter for the Object ID of your table from dba_objects and the the column STATISTIC_NAME='optimized physical reads'.
B. You query v$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table.
C. YOU query VSSYSTEM_EVENTS and filter for the event 'cell physical IO interconnect bytes returned by smart scan', associated to your table.
D. You run the CellCli-command list activerequest , filtering for the attributes ioReason and objectNumber, that you specify as 'Smart Scan' and the Object ID of your table from DBA_OBJECTS.

Answer: A,C

Explanation:
The two actions that are not appropriate for monitoring how a large production table is accessed in order to leverage the benefits of the Exadata Platform are A) querying VSSYSTEMEVENTS and filtering for the event 'cell physical IO interconnect bytes returned by smart scan', associated to your table; and B) querying v$segmentstatistics and filtering for the Object ID of your table from dbaobjects and the the column STATISTICNAME='optimized physical reads'. Instead, you should query v$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table (C), or run the CellCli-command list activerequest, filtering for the attributes ioReason and objectNumber, that you specify as 'Smart Scan' and the Object ID of your table from DBA_OBJECTS (D). These two methods are outlined in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (Chapter 8, Monitoring the Exadata Database Machine).

NEW QUESTION # 54
......

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