2024年最新のお手軽に合格させる1Z0-902試験にはこちらが提供する問題集PDFテストエンジン
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Oracle Exadata Database Machine X8Mは、データベース操作の最大の効率性と拡張性を実現するために設計された高性能コンピューティングプラットフォームです。このマシンは、Oracle Databaseのパワーと、Oracle Databaseワークロードに特化したハードウェアおよびソフトウェアのパフォーマンスを組み合わせています。このマシンは、金融機関、医療機関、政府機関など、高性能データベース処理が必要なビジネスに最適です。
Oracle Exadata Database Machine X8Mは、ミッションクリティカルなデータベースのための極端なパフォーマンス、スケーラビリティ、可用性を提供する高性能データベースアプライアンスです。このマシンは、Oracle Databaseワークロードに最適化されたハードウェアとソフトウェアの組み合わせで構成されています。Oracle 1z1-902認定試験は、Exadataソフトウェアおよびハードウェアコンポーネント、Exadataデータベース管理、Exadataバックアップおよび復旧、およびExadataパフォーマンス最適化などのトピックをカバーしています。試験に合格した候補者は、Exadata Database Machine X8Mシステムの実装と管理における専門知識を証明し、職務機会の向上や高い給与を得ることができます。
Oracle 1z1-902試験は、120分以内に回答する必要のある60個の多肢選択問題から構成されています。試験では、Oracle Exadata Database Machine X8Mアーキテクチャ、ハードウェアコンポーネント、ソフトウェアのインストール、構成、管理、および監視など、幅広いトピックがカバーされています。候補者は、試験に合格し、Oracle Exadata Database Machine X8M実装スペシャリスト認定を取得するには、少なくとも68％のスコアが必要です。認定は2年間有効であり、候補者は認定ステータスを維持するために継続教育要件を完了する必要があります。
質問 # 32
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. 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.
- B. A splitter cable can be used to provide power to all PDU cables.
- C. The installation cannot proceed until two power feeds are available per PDU.
- D. The installation can go ahead, no change is required.
正解：D
解説：
According to the Oracle Exadata Database Machine X9M-2 Data Sheet1, each PDU has two power input cables that can be connected to separate power sources for redundancy. However, if only one power source is available per PDU, then a single cable can be used to provide sufficient power for normal operation.
https://www.oracle.com/a/ocom/docs/engineered-systems/exadata/exadata-x9m-2-ds.pdf
質問 # 33
You have configured a multirack Database Machine with two X9M-8 full racks all in a single cluster and storage grid comprising a total of 4 X9M-8 Database servers and 28 X9M-8 Storage servers.
Which two options are true regarding the servers on which Enterprise Manager agents must be deployed in order to monitor all components of this multirack configuration?
- A. on all database servers and at least two storage servers in both racks
- B. on all database servers in both racks and one storage server in each rack
- C. on at least two storage servers in both racks
- D. on only one database server in both racks
- E. on all storage servers in both racks
- F. on all database servers in the first rack
- G. on all database servers in the second rack
正解：A、B
質問 # 34
You have configured a multirack Database Machine with two X9M-8 full racks all in a single cluster and storage grid comprising a total of 4 X9M-8 Database servers and 28 X9M-8 Storage servers.
Which two options are true regarding the servers on which Enterprise Manager agents must be deployed in order to monitor all components of this multirack configuration?
- A. on at least two storage servers in both racks
- B. on all database servers in both racks and one storage server in each rack
- C. on all database servers and at least two storage servers in both racks
- D. on only one database server in both racks
- E. on all storage servers in both racks
- F. on all database servers in the first rack
- G. on all database servers in the second rack
正解：A、C
解説：
In order to monitor all components of this multirack configuration, Enterprise Manager agents must be deployed on at least two storage servers in both racks and all database servers in both racks. This is according to the Oracle Exadata Database Machine X9M Implementation Essentials official text book [1], in which it states "To monitor all components of the multirack configuration, you must deploy agents on all database servers and at least two storage servers in each rack" (page 6-15).
質問 # 35
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 Exadata Engineered System.
- C. Install in Oracle Virtual Machine with required hardware.
- D. Install on Oracle Database Appliance.
- E. Provide individual x86 64-Bit gateway hardware.
正解：A、B、E
解説：
These options are outlined in the Oracle Exadata Database Machine X9M Implementation Essentials official text book and resources. The customer can choose to either provide their own x86 64-Bit gateway hardware or purchase the recommended hardware from Oracle, or they can install the gateway on an Exadata Engineered System.
質問 # 36
Which two statements are true about enabling write-back flash cache?
- A. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
- B. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
- C. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
- D. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
- E. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
正解：A、D
解説：
When enabling write-back flash cache in a rolling manner, it is important to use DBCLI to inactivate the grid disks on all cells first so that all the cells are in the same state before the process is started. In a non-rolling manner, you must drop the Persistent Memory Commit Accelerator (PMEMLog) first. Write-back flash cache is not on by default for High Capacity Storage Servers in High Redundancy configurations and can be used on Extreme Flash Storage Servers. It's also important to check if it's necessary to drop the flash cache before enabling write-back flash cache.
質問 # 37
Which dbmcli command is NOT valid on Exadata X9M?
- A. dbmcli -e "LIST ALERTHISTORY WHERE agelnMinutes < 15"
- B. dbmcli -e "LIST METRICCURRENT WHERE name = 'DS_TEMP' "
- C. dbmcli -e "LIST IBPORT DETAIL"
- D. dbmcli -e "LIST METRICHISTORY WHERE name LIKE 'DS_.*'"
正解：C
解説：
The dbmcli -e "LIST IBPORT DETAIL" command is not valid on Exadata X9M. According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1][2], this command is only valid on Exadata X3 and X4 models. The other three commands are valid on Exadata X9M.
https://forums.oracle.com/ords/apexds/map/tech/apps-infra/discussion/4342715/monitoring-roce-performance
質問 # 38
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. Install Oracle Rest Data Services on each Database server and install the MS APEX application.
- B. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.
- C. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
- D. 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.
正解：C
解説：
To enable REST access to the MS process, you need to manually enable the REST services on each storage server by running the command cellcli -e "ALTER CELL ENABLE REST" and then configure authentication and authorization to ensure secure access. This is described in detail in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (Chapter 8, Securing the Exadata Database Machine).
質問 # 39
Which two activities are supported on the storage servers in an Exadata Database Machine?
- A. changing the root password
- B. upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure
- C. upgrading the Storage Server software package using rpm
- D. installing an alternative package manager
- E. configuring secure shell user equivalency for the cellmonitor user
正解：B、C
解説：
Exadata Database Machine is a preconfigured and optimized for database workloads. The storage servers in an Exadata Database Machine are used to store database data, and support activities such as upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure and upgrading the Storage Server software package using rpm. These activities are related to maintain the storage servers performance and security. Changing the root password, installing an alternative package manager, and configuring secure shell user equivalency for the cellmonitor user are activities that can be performed on any Linux machine, but they are not specific to Exadata Database Machine.
質問 # 40
What is the maximum DRAM capacity you can expand an X9M-2 DB Server?
- A. 1536GB
- B. 1024GB
- C. 384GB
- D. 512GB
- E. 768GB
- F. 2048GB
正解：F
解説：
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).
質問 # 41
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. 2,6,1,4,3,7,5
- C. 2,3,4,6,1,7,5
- D. 3,2,6,1,4,7,5
- E. 4,3,2,6,1,7,5
正解：C
解説：
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).
質問 # 42
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. the Power Distribution Units (PDUs)
- B. Oracle clusterware on the database server
- C. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers
- D. the RDMA over Converged Ethernet (RoCE) switches
- E. the storage server ILOM
- F. ASM instances
正解：A、D、E
解説：
According to Oracle's documentation12, the components that are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins are:
The storage server ILOM2
The Power Distribution Units (PDUs)2
The RDMA over Converged Ethernet (RoCE) switches3
質問 # 43
Which statement is true about the patching features provided in Platinum Services?
- A. The rolling and complete down time approaches are two options to patching.
- B. Patching services are available for the full software stack up to twice per year.
- C. Patching is done automatically during business hours.
- D. Oracle Platinum Service covers Exadata storage software and firmware patching, but customers must perform the database patching.
正解：B
解説：
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.
質問 # 44
Your system administrator reports an amber, non-blinking light on one of your Exadata storage disks. You immediately execute the 'list physicaldisk where diskType=HardDisk and status=failed DETAIL' command on the Exadata storage system and the specified disk is indeed reported as failed. Platinum Support has not been enabled for this system. Enterprise Manager Cloud Control is monitoring the system.
What is the next step that you should perform before you do anything else?
- A. Check the database to see if any rebalance operations are active.
- B. Call Oracle Support and make an appointment so that the drive can be replaced.
- C. Wait for a blue light to appear on the disk if the rebalance operation is running.
- D. Ask the system administrator to replace the broken disk with a spare.
- E. Wait for the email of the failure that Exadata or Enterprise Manager will send.
E Download and run the latest exadiag tool.
正解：D
質問 # 45
Which three statements are true about Oracle Configuration Manager (OCM) for an Exadata Database Machine?
- A. It collects configuration information automatically.
- B. It is mandatory to install OCM on all database servers.
- C. It collects configuration information on demand.
- D. Collected configuration information can be uploaded automatically to Oracle.
- E. Collected configuration information can be uploaded manually to Oracle.
- F. It is mandatory to install OCM on at least one database server.
正解：A、E、F
質問 # 46
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 "set threshold ds_temp comparison=' >', critical=30" on each database server
- C. dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server
- D. dbmcli -e "alert metriccurrent ds_temp where metricValue > 30" on each database server
正解：C
解説：
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 ds_temp 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 ds_temp 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.
質問 # 47
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 "set threshold ds_temp comparison=' >', critical=30" on each database server
- C. dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server
- D. dbmcli -e "alert metriccurrent ds_temp where metricValue > 30" on each database server
正解：C
解説：
According to Oracle's documentation1, to set a threshold for a metric on a database server, you need to use the create threshold command with the appropriate parameters. The set threshold command is used to modify an existing threshold2.
Therefore, the command that you should use to generate alerts for such an event is:
dbmcli -e "create threshold ds_temp comparison='>', critical=30" on each database server1
質問 # 48
What is the maximum DRAM capacity you can expand an X9M-2 DB Server?
- A. 2048GB
- B. 1536GB
- C. 1024GB
- D. 384GB
- E. 512GB
- F. 768GB
正解：B
解説：
According to 1, Exadata X9M-2 Database Servers are based on Intel Xeon Platinum 8368Y processors with 32 cores and 768 GB of DRAM memory per server. This memory can be expanded up to 1.5 TB per server by adding 24 x 32 GB DIMMs. The DRAM memory is used for buffer cache, PGA, and other database purposes1. Exadata X9M-2 Database Servers also have 25.6 TB of Persistent Memory Acceleration (PMEM) per server, which is used for log writes and columnar data caching1. PMEM is a new type of memory that combines the speed of DRAM with the persistence of flash2. Exadata X9M-2 Database Servers are designed to run Oracle Database workloads with high performance, scalability, and reliability2
質問 # 49
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