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Oracle Exadata Database Machine X9M Implementation Essentials Questions and Answers

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Question 1

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

Options:

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.

Question 2

You are hardening the security posture of your Exadata Database Machine. Before disabling ssh access to the storage servers, what should you do to enable REST access to the MS process?

Options:

Install Oracle Rest Data Services on each Database server and install the MS APEX application.

The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.

Install Oracle Rest Data Services on each Storage server and install the MS APEX application.

The MS Process on the storage servers is natively endowed with REST services and are enabled by default, however, appropriate roles and users should be created to ensure security.

Question 3

Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

Options:

OECA reconfigures the size of disk groups and recreates grid disks.

OECA extends the hardware for the elastic configuration only.

OECA allows one XT storage server in the configuration.

OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.

OECA facilitates PDU power selection initially and after equipment addition.

Question 4

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?

Options:

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.

Question 5

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?

Options:

$ ${ORACLE_HOME}/suptools/tfa/release/tfa_home/bin/tfact1 —from _17:00:00 —to _23:59:00

# /opt/oracle.SupportTools/ibdiagtools/netcheck/runDiagnostics.pm —from _17:00:00 —to _23:59:00

# /opt/oracle.ExaWatcher/GetExaWatcherResults.sh —from _17:00:00 —to _23:59:00

# /opt/oracle.SupportTools/exachk/exachk —from _17:00:00 —to _23:59:00

Question 6

Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?

Options:

Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release.

Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk.

Run exachk and resolve only WARNINGS that you have not seen before.

Run the appropriate patchmgr preqequisite check step for each component being updated.

Run patchmgr --all_comp —autofix —autobackup —upgrade —rolling.

For database servers, perform a server backup using patchmgr —dbnodes db_list_file —backup —rolling.

Question 7

Which two statements are true in regards to starting the Exadata Virtual Machine?

Options:

To see Oracle Linux boot messages during guest startup, use —console option with the vm_maker —start-domain command.

Use vm_maker —start-domain to start a virtual machine manually.

Use vm_maker boot-from-iso command to boot a virtual machine.

To streamline the diagnosis of virtual machines, one ISO file is used for multiple Oracle Exadata System Software releases.

Use vm_maker —auto-start command to configure a virtual machine to start automatically when the KVM host is started.

Question 8

Which statement is true about the patching features provided in Platinum Services?

Options:

Oracle Platinum Service covers Exadata storage software and firmware patching, but customers must perform the database patching.

Patching services are available for the full software stack up to twice per year.

The rolling and complete down time approaches are two options to patching.

Patching is done automatically during business hours.

Answer:

Explanation:

Oracle Platinum Services provides patching features for the full software stack, which includes operating systems, virtualization, storage software and firmware, and databases. This service is typically performed up to twice per year, allowing customers to schedule the patching at their convenience. The patching is usually done to keep the software and firmware up-to-date and to fix any known security vulnerabilities. It's important to note that patching services are not done automatically during business hours, customer's involvement and schedule is needed, and the rolling and complete downtime approaches are options to minimize the impact on the system during patching.

The correct statement about the patching features provided in Platinum Services is that patching services are available for the full software stack up to twice per year. Oracle Platinum Service covers Exadata storage software and firmware patching, and customers must also perform the database patching. The rolling and complete down time approaches are two options for patching, and patching should be scheduled for times when the system is not being heavily used. Patching is not done automatically during business hours. This is covered in section 4.13 of the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book and Resources [1].

[1]

Search results: [1] Oracle Exadata Storage Server Patching [1][2]. Oracle Exadata Storage Server patching is performed by a team of Oracle engineers [3][2], and includes the latest Oracle… [2] Patching and Upgrades. Oracle Database Machine provides automated patching and upgrades for the full Exadata software stack, up to twice a year, with… [3] Virtualized Exadata. Oracle Database Machine X9M-2 comes with a choice of two patching approaches to accommodate different customer needs: Rolling… [4] Jan 10, 2017 … Exadata Patching Process. Oracle Exadata Storage Server patching is performed by a team of Oracle engineers [3][2], and includes the latest…

Question 9

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

Options:

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.

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Oracle Exadata Database Machine X9M Implementation Essentials Questions and Answers

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