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

NEW QUESTION # 29
You are in the process of upgrading your nonvirtualized X9M-2 Database Machine elastic configuration with 4 database servers and 7 HC storage servers with an additional 4 database servers and 7 HC storage servers.
The new storage servers are called DM01CEL08 through dmoicel14.
After creating 96 new griddisks, you issued this SQL statement:

How many failgroups if any, will be added to the DATE diskgroup by executing this SQL statement?

• A. 12 consisting of seven griddisks each
• B. 7 consisting of 12 griddisks each
• C. 1 consisting of all 96 griddisks
• D. 0 because the new griddisks will be added to the existing faiigroups
• E. 96 consisting of one griddisk each

Answer: C Explanation:
This SQL statement is adding the new griddisks to the existing diskgroup "DATA" and creating one new failgroup, consisting of all 96 griddisks. The "REBALANCE POWER 512" option tells the system to perform a rebalance operation with a power of 512. It means the system distributes the data evenly across all the disks in the diskgroup using a power of 512.
NEW QUESTION # 30
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 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.
• B. You query v$SYSTAT and filter for the statistic 'cell smart table scan', associated to your table.
• C. You query v$segmentstatistics and filter for the Object ID of your table from dbaobjects and the the column STATISTIC_NAME='optimized physical reads'.
• D. YOU query VSSYSTEM_EVENTS and filter for the event 'cell physical IO interconnect bytes returned by smart scan', associated to your table.

Answer: C,D 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 # 31
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 alert ds_temp> 30" on each database server
• B. dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server
• C. dbmcli -e "set threshold ds_temp comparison=' >', critical=30" on each database server
• D. dbmcli -e "alert metriccurrent ds_temp where metricValue > 30" on each database server

Answer: B Explanation:
The correct command to generate alerts for an event when the temperature of the database servers in an Exadata Full Rack exceeds 30C is "dbmcli -e "create threshold dstemp comparison='>', critical=30" on each database server". The dbmcli is the command-line interface for the Oracle Database Management Agent (DMA), which allows you to perform various management tasks on the Exadata servers. This command creates a threshold for the dstemp metric with a comparison operator of ">" (greater than), and a critical value of 30. The threshold is set on all database servers in the Exadata Full Rack, so when the server temperature exceeds 30C, an alert will be generated.
NEW QUESTION # 32
Which two statements are true about applying updates on Exadata systems?

• A. For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.
• B. Failed storage server updates are automatically rolled back to a previous release.
• C. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.
• D. Failed database server updates are rolled back to a working state on a previous release automatically.
• E. Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum -exclude option.
• F. When running a "yum update" for a new Exadata release, all other repositories should be disabled.

Answer: A,B Explanation:
1. Exadata updates have a rollback feature in case the update fails, this means that the system will roll back to a previous release automatically, this applies to storage servers updates. D. Yum, the package manager used in Exadata, automatically installs a non-UEK kernel when running a regular update, this kernel can be selected to boot from grub.
NEW QUESTION # 33
Which are two correct statements for managing virtual deployment using Oracle Exadata Deployment Assistant (OEDA)?

• A. OEDA sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA.
• B. OEDA deployment steps include calibrate cells, create cell disks, and resecure machine.
• C. There is no limit on the number of VMs in an Exadata rack as long as the Exadata rack has adequate resources.
• D. OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack.

Answer: A,D Explanation:
Oracle Exadata Deployment Assistant (OEDA) enables customers to deploy Oracle Exadata Database Machine in virtualized environments and it support both bare metal and virtual machine deployment in an Exadata X9M Quarter Rack.
OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack, and it sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA. According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], OEDA deployment steps include setup, configure, deploy, and manage. The number of VMs in an Exadata rack is limited by the available resources in the rack, such as CPU, Memory, and Storage.
NEW QUESTION # 34
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