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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q29-Q34):

NEW QUESTION # 29
A new Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs is being installed in a Data Center. However, the Data Center is only providing enough power for a single cable from each PDU.
Which statement is correct?

• A. A splitter cable can be used to provide power to all PDU cables.
• B. The installation can go ahead, no change is required.
• C. The installation cannot proceed until two power feeds are available per PDU.
• D. The power cables from the servers to the PDUs can be rearranged inside the rack following OECA guidance to utilize a single PDU power cable.

Answer: C Explanation:
An Exadata Quarter Rack with 2 Database Servers and 3 HC Storage Servers and 3-phase 15kVA PDUs would typically require two power feeds per PDU, one for each of the two power distribution units (PDUs) in the rack. A single power feed per PDU is not sufficient to provide the necessary power to the servers and storage in the rack.
NEW QUESTION # 30
You are providing oversight for the delivery of a new Exadata Database Machine.
1. Stabilize the Exadata Rack.
2. Unpack Oracle Exadata Rack.
3. Review the safety guidelines.
4. Let the Exadata acclimatize for 24 hours.
5. Power on Exadata PDU A.
6. Place Exadata in its allocated space.
7. Power on Exadata PDU B.
What is the correct order of these steps?

• A. 2,6,1,4,3,7,5
• B. 3,2,6,4,1,7,5
• C. 2,3,4,6,1,7,5
• D. 4,3,2,6,1,7,5
• E. 3,2,6,1,4,7,5

Answer: C Explanation:
This ordering is based on the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and other resources. First, the Exadata should be stabilized and unpacked (Steps 2 and 3). Then, the safety guidelines should be reviewed (Step 4). The Exadata should then be allowed to acclimatize for 24 hours (Step 4). After that, the Exadata PDU A should be powered on (Step 6) and the Exadata should be placed in its allocated space (Step 6). Finally, the Exadata PDU B should be powered on (Step 7).
NEW QUESTION # 31
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$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table.
• B. You query v$segmentstatistics and filter for the Object ID of your table from dbaobjects and the the column STATISTIC_NAME='optimized physical reads'.
• 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:
1. YOU query VSSYSTEM_EVENTS and filter for the event 'cell physical IO interconnect bytes returned by smart scan', associated to your table. This does not show how much data was filtered by Smart Scan, but only how much data was returned after Smart Scan12.
2. You query v$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table. This does not show how much data was filtered by Smart Scan for a specific table, but only for all tables in a session12.
https://www.databasejournal.com/oracle/monitoring-smart-scans-in-oracle-exadata/
NEW QUESTION # 32
Which two Exadata security features would you configure to control which databases can access which griddisks, when multiple databases share space on your storage servers in an unpartitioned storage grid?

• A. File permissions on the griddisks in each database server
• B. File permissions on the griddisks in each storage server
• C. Exadata storage realms using ASM-scoped security mode
• D. Using EXADCLI instead of CELLCLI to create the griddisks
• E. Exadata storage realms using database-scoped security mode

Answer: B,C Explanation:
When multiple databases share space on the storage servers in an unpartitioned storage grid, two Exadata security features can be configured to control which databases can access which griddisks.
Exadata storage realms using ASM-scoped security mode: This feature allows you to create storage realms and assign them to specific databases. This allows you to control which databases have access to which griddisks. The ASM-scoped security mode applies to all griddisks within an ASM disk group, which means that all griddisks in a disk group will be accessible only to the databases that belong to the assigned storage realm.
File permissions on the griddisks in each storage server: This feature allows you to configure file permissions on the griddisks at the storage server level. You can assign specific permissions to specific users or groups, allowing you to control which databases can access which griddisks.
NEW QUESTION # 33
You are concerned about the operating temperature of the database servers in your Exadata Full Rack and want to be alerted if the server exceeds 30C.
What command should use use to generate alerts for such an event?

• A. dbmcli -e "set threshold ds_temp comparison=' >', critical=30" on each database server
• B. dbmcli -e "set alert ds_temp> 30" on each database server
• C. dbmcli -e "alert metriccurrent ds_temp where metricValue > 30" on each database server
• D. dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server

Answer: B
NEW QUESTION # 34
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