Pass Exam Questions Efficiently With 1Z0-902 Questions (2023) [Q24-Q49]

Pass Exam Questions Efficiently With 1Z0-902 Questions (2023) 

1Z0-902 Questions - Truly Beneficial For Your Oracle Exam 

What is the importance of the Oracle Exadata Database Machine X9M Implementation Essentials Certification?

We all know that the Oracle Exadata Database Machine X9M is a powerful database machine which is designed to manage large-scale data. And the Oracle Exadata Database Machine X9M Implementation Essentials Certification is the latest Oracle certification. It is one of the most popular certifications. Oracle 1Z0-902 exam dumps will help you to get certified. In contrast, if you don't have this certification, then you will not be able to get a high-paying job.

In this certification, you will learn the implementation details of the Exadata Database Machine X9M and you will be given the practical knowledge to implement the Oracle Exadata Database Machine X9M.

You will learn how to configure, deploy, and manage the Oracle Exadata Database Machine X9M.

You will also understand the architecture of the Oracle Exadata Database Machine X9M and the related components.

As the title says, the Oracle Exadata Database Machine X9M Implementation Essentials Certification is one of the most important certifications.

It is widely regarded as the most comprehensive and detailed Oracle certification. There are no other Oracle certifications that cover the same amount of topics.

The main reason is that the Exadata Database Machine X9M Implementation Essentials Certification covers all the latest Oracle Exadata Database Machine X9M features.

Oracle 1z1-902 certification exam is designed to validate the skills and knowledge of IT professionals who are tasked with implementing the Exadata Database Machine X8M. 1Z0-902 exam covers a wide range of topics, including the installation and configuration of Exadata storage servers, the configuration of network components, and the management and administration of Oracle databases on the Exadata platform.

 

NEW QUESTION # 24
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. 3,2,6,4,1,7,5
• B. 2,3,4,6,1,7,5
• C. 3,2,6,1,4,7,5
• D. 4,3,2,6,1,7,5
• E. 2,6,1,4,3,7,5

Answer: A

Explanation:
The correct sequence is:
Review the safety guidelines. This is important to ensure a safe and successful installation1.
Unpack Oracle Exadata Rack. This involves removing the packaging materials and inspecting the rack for damage or missing components1.
Place Exadata in its allocated space. This involves moving the rack to its final location and securing it with bolts and brackets1.
Let the Exadata acclimatize for 24 hours. This is recommended to allow the rack components to adjust to the ambient temperature and humidity before powering on1.
Stabilize the Exadata Rack. This involves leveling the rack and adjusting its height if needed1.
Power on Exadata PDU B. This involves connecting PDU B to a power source and turning it on1.
Power on Exadata PDU A. This involves connecting PDU A to a power source and turning it on1

NEW QUESTION # 25
You are planning the monitoring configuration for your Exadata X9M Database Machine.
Which three components are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins?

• A. Oracle clusterware on the database server
• B. the Power Distribution Units (PDUs)
• C. the storage server ILOM
• D. the RDMA over Converged Ethernet (RoCE) switches
• E. ASM instances
• F. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers

Answer: A,C,E

Explanation:
1. The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 6-25) recommends using the Exadata-specific Enterprise Manager Plug-Ins to monitor ASM instances.
2. Additionally, the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 6-25) recommends using the Exadata-specific Enterprise Manager Plug-Ins to monitor the storage server ILOM.
3. The Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 6-25) also recommends using the Exadata-specific Enterprise Manager Plug-Ins to monitor Oracle clusterware on the database server.

NEW QUESTION # 26
Which two statements are true about enabling write-back flash cache?

• A. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
• B. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
• C. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
• D. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
• E. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.

Answer: A,B

Explanation:
According to the Oracle documentation1, two statements that are true about enabling write-back flash cache are:
Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations (A). This is because write-back flash cache provides better performance and reliability for data file writes than write-through flash cache.
Before write-back flash cache is enabled, you need to drop the Flash Cache first (D). This is because changing the flash cache mode requires recreating the flash cache with a different configuration.

NEW QUESTION # 27
Which three statements are true about the CELLCLI command?

• A. It can be executed using the DCLI utility.
• B. It has command-line history.
• C. It can execute commands on multiple storage servers in parallel.
• D. It can be executed on storage servers.
• E. It requires root privileges to create CELLDISKS and GRIDDISKS.

Answer: A,B,D

Explanation:
The CellCLI utility supports command-line history.
Each Exadata Storage cell can be monitored, configured, and maintained using the cellcli command line interface.
The dcli utility facilitates centralized management across an Oracle Exadata Storage Server Software realm by automating the execution of CellCLI commands on a set of cells and returning the output to the centralized management location where the dcli utility was run.
References: http://docs.oracle.com/cd/E80920_01/SAGUG/exadata-storage-server-cellcli.htm

NEW QUESTION # 28
What is the maximum DRAM capacity you can expand an X9M-2 DB Server?

• A. 1536GB
• B. 1024GB
• C. 2048GB
• D. 512GB
• E. 768GB
• F. 384GB

Answer: C

NEW QUESTION # 29
Which of the following is NOT a requirement when validating, receiving, unpacking, and planning access route and space requirements for Exadata Database Machine?

• A. 914mm of space required above the rack height is required for maintenance access.
• B. All four leveling and stabilizing feet should be raised and out of the way prior to moving the rack.
• C. A conditioned space is required to remove the packaging material to reduce particles before entering the data center.
• D. The entire access route to the installation site should be free of raised-pattern flooring that can cause vibration.
• E. Oracle Exadata Rack may only be installed on raised floor environments.
• F. The incline of any access route ramp must be less than or equal to 6 degrees.

Answer: C

NEW QUESTION # 30
Which three steps are required to expand an Exadata X9M-2 Database Server with the lowest memory configuration available to the highest memory configuration?

• A. Add 12x 32GB DIMMs.
• B. Add 24x 32GB DIMMs.
• C. Add 16x 32GB DIMMs.
• D. Add 16x 64GB DIMMs.
• E. Remove existing memory modules.
• F. Add 12x 64GB DIMMs.
• G. Add 32x 64GB DIMMs.
• H. Memory cannot be expanded on Exadata X9M-2 Database Servers.
• I. Shutdown the Database Server if running.

Answer: C,D,E

NEW QUESTION # 31
Which statement is true about the Persistent Memory Commit Accelerator?

• A. Persistent Memory Commit Accelerator copies redo log data from disk for faster redo apply on Data Guard Standby Databases.
• B. Persistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.
• C. Persistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.
• D. Persistent Memory Commit Accelerator helps to further reduce redo log write latency by using Persistent Memory and Remote Direct Memory Access (RDMA).
• E. Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk.

Answer: D

Explanation:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmso/new-features-exadata-system-software-release-23.html

NEW QUESTION # 32
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

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

Answer: C,D

Explanation:
D) ASR can upload configuration metadata to support problem resolution1.
E) 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 # 33
What is the maximum DRAM capacity you can expand an X9M-2 DB Server?

• A. 1536GB
• B. 1024GB
• C. 2048GB
• D. 512GB
• E. 768GB
• F. 384GB

Answer: C

Explanation:
The Exadata X9M-2 Database Machine uses powerful database servers, each with two 32-core x86 processors and 512 GB of memory (expandable up to 2 TB).

NEW QUESTION # 34
You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?

• A. ifconfig -a legrep "re0| re1"
• B. cat /proc/net/bonding/bondeth0
• C. /opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 -all
• D. netstat -rn

Answer: C

NEW QUESTION # 35
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?

• A. Copy and execute the script on all storage servers using the EXACLI command.
• B. Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.
• C. Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
• D. Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.
• E. Copy and execute the script on all storage servers using the dcli command.

Answer: A

NEW QUESTION # 36
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?

• A. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.
• B. patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
• C. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.
• D. patchmgr must be invoked with the -rolling argument with all database and storage servers listed in a single input file.

Answer: B

NEW QUESTION # 37
Which are three customer options for hosting the Platinum Services Advanced Support Gateway?

• A. Purchase the recommended x86 64-Bit gateway hardware from Oracle.
• B. Install on Oracle Database Appliance.
• C. Provide individual x86 64-Bit gateway hardware.
• D. Install on Exadata Engineered System.
• E. Install in Oracle Virtual Machine with required hardware.

Answer: A,B,C

Explanation:
According to Oracle's documentation1, the customer options for hosting the Platinum Services Advanced Support Gateway are:
Provide individual x86 64-Bit gateway hardware1
Purchase the recommended x86 64-Bit gateway hardware from Oracle1
Install on Oracle Database Appliance2

NEW QUESTION # 38
You have been asked by Oracle Support to check the firmware of the hard & flash disks in a storage server. Which cellcli command should you use to get this information?

• A. list cell attributes name, deviceName, diskType, physicalFirmware
• B. list devices attributes name, deviceName, diskType, physicalFirmware
• C. list physicaldisk attributes name, deviceName, diskType, physicalFirmware
• D. list celldisk attributes name, deviceName, diskType, physicalFirmware

Answer: C

NEW QUESTION # 39
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?

• A. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
• B. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
• C. PMEM Cache section within Exadata Smart Statistics
• D. PMEM Pool Misses in the Exadata Outlier Summary
• E. PMEM Cache section within Memory Statistics

Answer: A,E

Explanation:
The "cell PMEM cache Read Hits" in the "Database IOs" portion of the "Performance Summary" will show the number of reads that have been satisfied from the Persistent Memory Cache. The "PMEM Cache" section within "Memory Statistics" will give detailed information about the usage of the Persistent Memory Cache, such as cache size, used size, hit rate, etc. This information can help to identify if the Persistent Memory Cache is being used effectively and if there are any issues with it.

NEW QUESTION # 40
Which three steps are required to expand an Exadata X9M-2 Database Server with the lowest memory configuration available to the highest memory configuration?

• A. Add 12x 32GB DIMMs.
• B. Add 24x 32GB DIMMs.
• C. Remove existing memory modules.
• D. Add 16x 32GB DIMMs.
• E. Add 12x 64GB DIMMs.
• F. Shutdown the Database Server if running.
• G. Add 32x 64GB DIMMs.
• H. Memory cannot be expanded on Exadata X9M-2 Database Servers.
• I. Add 16x 64GB DIMMs.

Answer: C,F,G

Explanation:
https://www.oracle.com/a/ocom/docs/engineered-systems/exadata/exadata-x9m-2-ds.pdf
https://chriscraftoracle.wordpress.com/2022/11/09/what-makes-exadata-faster/

NEW QUESTION # 41
You must drop all celldisks on all the storage servers in an X9M-2 quarter rack as part of a reconfiguration project.
Which three statements describe the account on the storage servers which you should use and the tool that may be used to drop the celldisks?

• A. to the CELLADMIN account by calling CELLCLI on all cells using DCLI
• B. to the CELLMONITOR account using cellcli interactively on each storage server
• C. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling CELLCLI on all cells using exadcli
• D. to the CELLMONITOR account calling CELLCLI on all cells using DCLI
• E. to an administrator-created storage server user with appropriate privileges on celldisk objects by calling EXACLI on all cells using exadcli
• F. to the CELLADMIN account using cellcli interactively on each storage server

Answer: B,C,D

NEW QUESTION # 42
Which are two correct statements about backing up Exadata Database Machine?

• A. For high availability, system area can be on the first two disks and M.2 devices.
• B. 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.
• C. Backing up Exadata Storage Server Software is critical for restoration.
• D. Use a snapshot-based backup of an Oracle Exadata Database Machine database server software.
• E. Backup of the Oracle Cluster Registry, which also contains Voting Disk information, is automatically maintained on the file system of the first database server.

Answer: C,E

Explanation:
[1] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 4: Oracle Clusterware [2] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 8: Oracle Exadata Storage Server Software [3] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], Chapter 9: Oracle Exadata Storage Server Infrastructure
https://www.oracle.com/technetwork/database/availability/exadata-backup-recovery-bp-3633870.pdf

NEW QUESTION # 43
You are planning the monitoring configuration for your Exadata X9M Database Machine.
Which three components are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins?

• A. Oracle clusterware on the database server
• B. the Power Distribution Units (PDUs)
• C. the storage server ILOM
• D. the RDMA over Converged Ethernet (RoCE) switches
• E. ASM instances
• F. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers

Answer: A,C,E

NEW QUESTION # 44
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?

• A. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
• B. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
• C. PMEM Pool Misses in the Exadata Outlier Summary
• D. PMEM Cache section within Exadata Smart Statistics
• E. PMEM Cache section within Memory Statistics

Answer: D,E

Explanation:
The AWR report has two sections that show statistics for X9M Persistent Memory Cache: the PMEM Cache section within Memory Statistics and the PMEM Cache section within Exadata Smart Statistics. Both of these sections provide detailed information about the read and write hits and misses, as well as the total capacity and utilization of the PMEM cache. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 515)

NEW QUESTION # 45
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?

• A. 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.
• B. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
• C. Install Oracle Rest Data Services on each Database server and install the MS APEX application.
• D. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.

Answer: A

NEW QUESTION # 46
Which are two correct statements for managing virtual deployment using Oracle Exadata Deployment Assistant (OEDA)?

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

Answer: B,D

NEW QUESTION # 47
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.

NEW QUESTION # 48
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?

• A. 4, 7, 8, 3, and 6
• B. 1, 8, 7, 3 and 6
• C. 2, 7, 8, and 6
• D. 5, 8, 7, and 6
• E. 2, 8, 7, 3, and 6

Answer: C

NEW QUESTION # 49
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