1Z0-902 Practice Dumps – Verified By Real4dumps Updated 87 Questions [Q49-Q65]

NEW QUESTION 49
I/O performance of the prod database on your Exadata Database Machine has degraded slightly over the past month. The database has been allocated to the OLTP I/O Resource Management (IORM) category.
Which two monitoring tools might be useful in examining I/O performance for the prod database?

OS I/O metrics using Enterprise Manager host pages for the storage servers

OS I/O metrics using OS tools such as iostat on the database servers

I/O-specific dynamic performance views such as v$iostat_fiie, v$iostat_function, and v$iostat_consumer_group from the prod database instances using SQL *p1us

cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk

OS I/O metrics using OS tools such as iostat on the storage servers

NEW QUESTION 50
Which two statements are true about enabling write-back flash cache?

Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.

Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.

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.

When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.

NEW QUESTION 51
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?

$ ${ORACLE_HOME}/suptools/tfa/release/tfa_home/bin/tfact1 -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

# /opt/oracle.SupportTools/ibdiagtools/netcheck/runDiagnostics.pm -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

# /opt/oracle.ExaWatcher/GetExaWatcherResults.sh -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

# /opt/oracle.SupportTools/exachk/exachk -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

NEW QUESTION 52
Which are two correct statements about backing up Exadata Database Machine?

Backup of the Oracle Cluster Registry, which also contains Voting Disk information, is automatically maintained on the file system of the first database server.

Backing up Exadata Storage Server Software is critical for restoration.

For high availability, system area can be on the first two disks and M.2 devices.

The M.2 disk is hot pluggable and can be replaced when the power is on, but you will have to restore the system data manually.

Use a snapshot-based backup of an Oracle Exadata Database Machine database server software.

NEW QUESTION 53
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

ASR Manager must be installed and configured on a dedicated server external to the Database Machine.

Configuring ASR is mandatory for all Database Machine assets.

ASR Manager must be installed and configured on one of the database servers.

ASR can upload configuration metadata to support problem resolution.

ASR Manager opens a service request (SR) automatically after sensors detect hardware faults.

ASR communicates with Oracle support services using HTTPS.

NEW QUESTION 54
You are updating your Exadata X9M-2 Elastic Database Machine with 6 database servers and 12 High Capacity Storage Servers. You will be using patchmgr to apply updates across the entire machine while still maintaining database availability.
Assuming you are driving patchmgr from an external server, which statement is true about the execution phase?

patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.

patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.

patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.

patchmgr must be invoked with the -rolling argument with all database and storage servers listed in a single input file.

NEW QUESTION 55
Which three statements are true about the CELLCLI command?

It can execute commands on multiple storage servers in parallel.

It has command-line history.

It requires root privileges to create CELLDISKS and GRIDDISKS.

It can be executed on storage servers.

It can be executed using the DCLI utility.

NEW QUESTION 56
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.

Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.

When backing up multi-rack systems, sharing Exadata X9M switches is recommended.

ZFS Snapshots can provide rapid cloning of development and test environment.

NEW QUESTION 57
You plan to monitor the status of the motherboard, memory, power, fans, and network cards on the database nodes in your Exadata Database Machine using Enterprise Manager.
Where must you set the thresholds for these hardware components and why, to assure that sensor readings, faults, and any related alerts, are visible in Enterprise Manager?

No thresholds need to be set because they are preset in the ILOM and in Enterprise Manager

Set thresholds in ILOM and in Enterprise Manager because they are not preset anywhere and must be set in both places.

Set thresholds only in ILOM because they are not preset anywhere but need to be set only in ILOM.

No thresholds need to be set because they are preset in the ILOM and these are sufficient for monitoring.

NEW QUESTION 58
Examine these commands:
1. Execute “crscti stop cluster -all” as the grid user from one database server.
2. Execute “crscti stop cluster -all” as root from one database server.
3. Power off all network switches.
4. Execute “crscti stop cluster” as root from one database server.
5. Execute “crscti stop cluster” as the grid user from one database server.
6. Power off the rack using the power switches on the PDUs.
7. Execute “shutdown -h now” on all database servers.
8. Execute “shutdown -h now” on all Exadata storage servers.
Which is the correct order or the required commands to completely power off an Exadata Database Machine in an orderly fashion?

5, 8, 7, and 6

4, 7, 8, 3, and 6

2, 8, 7, 3, and 6

2, 7, 8, and 6

1, 8, 7, 3 and 6

NEW QUESTION 59
I/O performance of the prod database on your Exadata Database Machine has degraded slightly over the past month. The database has been allocated to the OLTP I/O Resource Management (IORM) category.
Which two monitoring tools might be useful in examining I/O performance for the prod database?

OS I/O metrics using Enterprise Manager host pages for the storage servers

OS I/O metrics using OS tools such as iostat on the database servers

I/O-specific dynamic performance views such as v$iostat_fiie, v$iostat_function, and v$iostat_consumer_group from the prod database instances using SQL *p1us

cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk

OS I/O metrics using OS tools such as iostat on the storage servers

NEW QUESTION 60
You have a script with several CELLCLI commands that must be executed on each cell in your Exadata full rack. The script must run on each cell simultaneously. How must you achieve this?

Copy and execute the script on all storage servers using the EXACLI command.

Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.

Copy and execute the script on all storage servers using the dcli command.

Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.

Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.

NEW QUESTION 61
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

ASR Manager must be installed and configured on a dedicated server external to the Database Machine.

Configuring ASR is mandatory for all Database Machine assets.

ASR Manager must be installed and configured on one of the database servers.

ASR can upload configuration metadata to support problem resolution.

ASR Manager opens a service request (SR) automatically after sensors detect hardware faults.

ASR communicates with Oracle support services using HTTPS.

NEW QUESTION 62
How do ASM failure groups provide redundancy?

Failure groups are created for each grid disk to ensure mirror copies are written to the same storage server for faster recovery after a physical disk failure.

Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.

They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.

Extended Redundancy mirrors data across data centers providing the highest levels of data protection.

NEW QUESTION 63
Which statement is true about the disks that are used in ASM diskgroups on the Exadata platform?

In an Exadata storage server, each disk is placed into a separate failure group.

The grid disks in ASM diskgroups must have similar performance characteristics in addition lo having the same size.

Sparse diskgroups are virtual objects allocated from the DATA diskgroup.

If High redundancy is selected, grid disks from the primary and secondary Exadata Database Machine must be specified.

Extreme Flash (EF) and High Capacity (HC) disks can be mixed to any capacity within the same diskgroup.

NEW QUESTION 64
You are adding a disk expansion kit to a running Exadata X8M Database Machine’s Database Servers, and have a filesystem layout that includes:

After running the following commands, which command needs to be run to add 20G of space to the filesystem mounted on /u01?

# lvextend -L +20G -verbose /dev/mapper/VGExaDb-LVDbOral

# xfs_growfs /uOl +20G

# resize2fs +20G /dev/VGExaDb/LVDbOral

# lvextend -L +20G -verbose /dev/VGExaDb/LVDbOral

NEW QUESTION 65
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?

YOU query VSSYSTEM_EVENTS and filter for the event ‘cell physical IO interconnect bytes returned by smart scan’, associated to your table.

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’.

You query v$SYSTAT and filter for the statistic ‘cell smart table scan’, associated to your table.

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.

1Z0-902 Practice Dumps – Verified By Real4dumps Updated 87 Questions [Q49-Q65]

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