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2023年最新の検証済み1Z0-902問題集と解答であなたを合格確定させるOracle Engineered Systems試験解答！ [Q22-Q44]

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2023年最新の検証済み1Z0-902問題集と解答であなたを合格確定させるOracle Engineered Systems試験解答！

1Z0-902試験問題集で100%合格率1Z0-902試験！


Oracle Exadata Database Machine X8Mは、最適なパフォーマンスとスケーラビリティを提供する高度なデータベースシステムです。これにより、組織はデータベース操作を効率化し、セキュアなクラウド機能を備えた高性能なインフラストラクチャを提供できます。Exadataの実装に熟練していることを保証するために、Oracle 1Z0-902（Oracle Exadata Database Machine X8M Implementation Essentials）試験が導入されました。

 

質問 # 22
Which two statements are true about applying updates on Exadata systems?

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

正解：D、F


質問 # 23
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?

  • A. OS I/O metrics using OS tools such as iostat on the storage servers
  • B. 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
  • C. OS I/O metrics using Enterprise Manager host pages for the storage servers
  • D. OS I/O metrics using OS tools such as iostat on the database servers
  • E. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk

正解：D、E


質問 # 24
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

  • A. OECA allows one XT storage server in the configuration.
  • B. OECA facilitates PDU power selection initially and after equipment addition.
  • C. OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.
  • D. OECA extends the hardware for the elastic configuration only.
  • E. OECA reconfigures the size of disk groups and recreates grid disks.

正解：C、E

解説：
The correct answers are Options A and D. Option A is correct because OECA reconfigures the size of disk groups and recreates grid disks. Option D is correct because OECA's "Add Equipment" input option allows allocation of RU slots for customer equipment.


質問 # 25
Which two statements are correct about adding an additional database server to a physical Exadata X9M Database Machine using Oracle Exadata Deployment Assistant (OEDA)?

  • A. Executing /opt/oracle.supportTools/reclaimdisks.sh -free -reclaim on each Exadata X9M Database server is required to reclaim disk space and perform partition reconfiguration.
  • B. In order to configure the servers with Oracle Exadata Deployment Assistant (OEDA), the new server information must be entered in OEDA, and the configuration file must contain existing nodes.
  • C. Do not proceed if the OEDA Validate Configuration File step displays an error message about missing files p6880880.zip.
  • D. The applyElasticConfig.sh script performs network configuration for the new servers. The new servers are restarted at the end of the process.
  • E. It is required to install OEDA on the first new database server.

正解：B、D

解説：
https://docs.oracle.com/en/database/oracle/oracle-database/21/ladbi/db-on-exadata.html


質問 # 26
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 32x 64GB DIMMs.
  • B. Shutdown the Database Server if running.
  • C. Memory cannot be expanded on Exadata X9M-2 Database Servers.
  • D. Remove existing memory modules.
  • E. Add 12x 32GB DIMMs.
  • F. Add 24x 32GB DIMMs.
  • G. Add 16x 64GB DIMMs.
  • H. Add 12x 64GB DIMMs.
  • I. Add 16x 32GB DIMMs.

正解：B、D、G

解説：
1. Remove existing memory modules: Before adding new memory modules, the existing memory modules should be removed.
2. Add 16x 64GB DIMMs: The new DIMMs should be added, in this case is 16 DIMMs of 64GB each, which will expand the memory to the highest configuration available.
3. Shutdown the Database Server if running: The Database Server should be shutdown before adding new memory modules in order to prevent any possible data loss or corruption.
The steps required to expand an Exadata X9M-2 Database Server with the lowest memory configuration available to the highest memory configuration are as follows:
Shutdown the Database Server if running.
Remove existing memory modules.
Add 16x 64GB DIMMs.
For reference, the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book states that "the lowest memory configuration for the Exadata X9M-2 Database Servers is 384GB and the highest is 768GB [1]. The memory upgrade is done in increments of 64GB using 16x 64GB DIMMs".


質問 # 27
Which two statements are true about applying updates on Exadata systems?

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

正解：A、F

解説：
According to Oracle's documentation12, some of the statements that are true about applying updates on Exadata systems are:
Failed storage server updates are automatically rolled back to a previous release1.
When running a "yum update" for a new Exadata release, all other repositories should be disabled1.


質問 # 28
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. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers
  • B. the Power Distribution Units (PDUs)
  • C. the RDMA over Converged Ethernet (RoCE) switches
  • D. the storage server ILOM
  • E. ASM instances
  • F. Oracle clusterware on the database server

正解：B、C、D

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 # 29
Which are three customer options for hosting the Platinum Services Advanced Support Gateway?

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

正解：A、C、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 # 30
You have been tasked with replacing a memory module of an Exadata Storage Server and need to power off the affected storage server. Which two commands must you execute to safely power off the storage server in an Exadata X9M Database Machine?

  • A. shutdown -h now' on the affected storage server
  • B. 'crsct1 stop cluster -all' on one of the database servers
  • C. CeLLCLI> alter cell shutdown SERVICES all on the affected storage server
  • D. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
  • E. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
  • F. CellCLI alter GRIDDISK all inactive on the affected storage server

正解：A

解説：
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmmn/maintaining-exadata-storage-servers.html#GUID-AE16A1DA-53C6-4E80-94E5-963AA65373AB


質問 # 31
Which are two correct statements for managing virtual deployment using Oracle Exadata Deployment Assistant (OEDA)?

  • A. OEDA deployment steps include calibrate cells, create cell disks, and resecure machine.
  • B. OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack.
  • 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 sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA.

正解：A、D

解説：
1. OEDA deployment steps include calibrate cells, create cell disks, and resecure machine2.
2. OEDA sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA2.


質問 # 32
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 an administrator-created storage server user with appropriate privileges on celldisk objects by calling EXACLI on all cells using exadcli
  • 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 the CELLADMIN account by calling CELLCLI on all cells using DCLI
  • F. to the CELLADMIN account using cellcli interactively on each storage server

正解：C、E、F

解説：
To drop all celldisks on all the storage servers in an X9M-2 quarter rack, you should use the CELLADMIN account, which has the necessary privileges to perform this task. You can use the CELLCLI command-line interface to drop the celldisks. The best way to do this is by calling CELLCLI on all cells using DCLI (Oracle Database Command Line Interface) which allows you to run commands on multiple servers at once. Alternatively, you can use an administrator-created storage server user with appropriate privileges on celldisk objects by calling CELLCLI on all cells using exadcli. It is not recommended to use the CELLMONITOR account, as it has a more limited set of privileges. It is also important to note that EXACLI is not a valid tool for this task
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmmn/maintaining-exadata-storage-servers.html


質問 # 33
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 the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
  • B. Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.
  • C. Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.
  • D. Copy and execute the script on all storage servers using the dcli command.
  • E. Copy and execute the script on all storage servers using the EXACLI command.

正解：E


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 only one database server in both racks
  • B. on all database servers in the second rack
  • C. on all database servers in the first rack
  • D. on all database servers and at least two storage servers in both racks
  • E. on all storage servers in both racks
  • F. on all database servers in both racks and one storage server in each rack
  • G. on at least two storage servers in both racks

正解：D、G

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 dbmcli command is NOT valid on Exadata X9M?

  • A. dbmcli -e "LIST METRICHISTORY WHERE name LIKE 'DS_.*'"
  • B. dbmcli -e "LIST IBPORT DETAIL"
  • C. dbmcli -e "LIST METRICCURRENT WHERE name = 'DS_TEMP' "
  • D. dbmcli -e "LIST ALERTHISTORY WHERE agelnMinutes < 15"

正解：D

解説：
1. dbmcli -e "LIST METRICHISTORY WHERE name LIKE 'DS_.*'" is valid command and it is used to list the historical values for metrics where the name starts with "DS_."
2. dbmcli -e "LIST METRICCURRENT WHERE name = 'DS_TEMP' " is valid command and it is used to list the current value of the metric named "DS_TEMP"
3. dbmcli -e "LIST IBPORT DETAIL" is valid command and it is used to list the InfiniBand ports and details of the Exadata X9M.
"dbmcli" is a command-line tool that is used to manage and monitor the Exadata Database Machine. It allows you to perform various tasks such as managing the database, storage, and network components, and monitoring the performance and health of the machine. The command "dbmcli -e "LIST ALERTHISTORY WHERE agelnMinutes < 15" is not a valid command, it is not supported on Exadata X9M.


質問 # 36
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. It is mandatory to install OCM on at least one database server.
  • E. Collected configuration information can be uploaded automatically to Oracle.
  • F. Collected configuration information can be uploaded manually to Oracle.

正解：A、D、F


質問 # 37
Which two statements are false about backup to ZFS Storage Appliance (ZFSSA)?

  • A. ZFS Snapshots can provide rapid cloning of development and test environment.
  • B. When backing up multi-rack systems, sharing Exadata X9M switches is recommended.
  • C. Top of Rack (ToR) switches are managed as part of the hardware stack and software levels are upgraded during the patching process.
  • D. ZFSSA may connect directly to the Exadata 100Gb RoCE network switches.

正解：B、D

解説：
1. ZFS Storage Appliance (ZFSSA) can't connect directly to the Exadata 100Gb RoCE network switches. ZFSSA uses Fibre Channel protocol to connect to the Exadata storage cells. C. When backing up multi-rack systems, sharing Exadata X9M switches is not recommended. Each rack should have its own switches to minimize the risk of data loss due to switch failure.


質問 # 38
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 32x 64GB DIMMs.
  • B. Shutdown the Database Server if running.
  • C. Memory cannot be expanded on Exadata X9M-2 Database Servers.
  • D. Remove existing memory modules.
  • E. Add 12x 32GB DIMMs.
  • F. Add 24x 32GB DIMMs.
  • G. Add 16x 64GB DIMMs.
  • H. Add 12x 64GB DIMMs.
  • I. Add 16x 32GB DIMMs.

正解：B、D、G

解説：
1. Remove existing memory modules: Before adding new memory modules, the existing memory modules should be removed.
2. Add 16x 64GB DIMMs: The new DIMMs should be added, in this case is 16 DIMMs of 64GB each, which will expand the memory to the highest configuration available.
3. Shutdown the Database Server if running: The Database Server should be shutdown before adding new memory modules in order to prevent any possible data loss or corruption.


質問 # 39
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.

正解：B、D


質問 # 40
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?

  • A. # /opt/oracle.ExaWatcher/GetExaWatcherResults.sh -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
  • B. # /opt/oracle.SupportTools/ibdiagtools/netcheck/runDiagnostics.pm -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
  • C. # /opt/oracle.SupportTools/exachk/exachk -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00
  • D. $ ${ORACLE_HOME}/suptools/tfa/release/tfa_home/bin/tfact1 -from <Fridays_Date>_17:00:00 -to <Sundays_Date>_23:59:00

正解：B


質問 # 41
For which four component failures on an X9M Database Machine does Auto Service Request (ASR) raise service requests?

  • A. power distribution units
  • B. fans in the storage servers
  • C. RoCE network interface cards in the storage servers
  • D. Cisco RDMA over Converged Ethernet (RoCE) switches
  • E. Cisco management switch
  • F. power supplies in the database servers
  • G. RoCE network interface cards in the database servers

正解：A、C、D、F

解説：
According to the Oracle Auto Service Request (ASR) documentation1, ASR raises service requests for qualified Oracle products that are detected with specific faults. The qualified Exadata products include2:
Database servers
Storage servers
InfiniBand switches
Cisco switches (X8M and later systems)
Power distribution units (PDUs)


質問 # 42
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, but are not enabled by default.
  • B. 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.
  • 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.

正解：B

解説：
The MS process on Exadata storage servers is natively endowed with REST services and these services are enabled by default. However, it is important to create appropriate roles and users to ensure security when accessing these services. This way, it is possible to disable ssh access to the storage servers, and still enable REST access to the MS process. It's not necessary to install Oracle Rest Data Services on each Database or Storage server or install the MS APEX application, the MS process on the storage servers already have REST services by default.


質問 # 43
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 only one database server in both racks
  • B. on all database servers in the second rack
  • C. on all database servers in both racks and one storage server in each rack
  • D. on all database servers in the first rack
  • E. on all database servers and at least two storage servers in both racks
  • F. on all storage servers in both racks
  • G. on at least two storage servers in both racks

正解：C、E


質問 # 44
......


Oracle 1z1-902（Oracle Exadata Database Machine X8M Implementation Essentials）認定試験は、Oracle Exadata Database Machine X8Mの実装と管理のスキルを検証したいITプロフェッショナルを対象としています。この試験は、Oracleデータベース技術の強い理解を持ち、Oracle Exadataの実装と管理の専門知識を向上させたい個人を対象としています。

 

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