Authentic 1z1-902 Dumps - Free PDF Questions to Pass [Q20-Q42]

Authentic 1z1-902 Dumps - Free PDF Questions to Pass

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Oracle 1z1-902 exam, also known as the Oracle Exadata Database Machine X8M Implementation Essentials exam, is designed for IT professionals who are responsible for implementing and maintaining the Oracle Exadata Database Machine X8M system. Oracle Exadata Database Machine X8M Implementation Essentials certification exam validates the skills and knowledge required to configure, deploy, and manage an Oracle Exadata Database Machine X8M system. 1z1-902 exam tests the candidate's ability to perform tasks such as configuring database servers, storage servers, and network infrastructure, as well as managing database backups, performance tuning, and troubleshooting issues.

Oracle 1z1-902 exam consists of 60 multiple-choice questions that must be completed within 105 minutes. Candidates must achieve a minimum score of 63% to pass the exam and earn the certification. 1z1-902 exam is available in multiple languages, including English and Japanese, and can be taken online or at a Pearson VUE testing center. With the Oracle 1z1-902 certification, professionals can enhance their career prospects, gain new skills and knowledge, and demonstrate their expertise in managing Oracle Exadata Database Machine X8M systems.

 

NEW QUESTION # 20
You have been asked to design a backup solution for an Exadata X9M-2 Quarter Rack with Extreme Flash Storage Servers connected to a new ZFS Storage Appliance ZS7 with 2 Storage Controllers with 100Gb Ethernet cards and 3 Storage Trays. You are using Oracle Exadata Configuration Assistant to validate the rack layout.
1. Use "Add Equipment" to add the Exadata X9M EF Storage Servers, starting from RU10.
2. Use drop down to add ZFS Storage Appliance Controllers.
3. You cannot add ZFS Storage Appliance to an Exadata Rack.
4. Use "Add Equipment" to add the ZFS Storage Trays, starting from RU1.
5. Use drop down to add ZFS Storage Trays.
6. Use "Add Equipment" to add the Exadata X9M Database Servers, starting from RU16.
7. Use "Add Equipment" to add the Exadata X9M EF Storage Servers, starting from RU1.
8. Use drop down to add Exadata X9M EF Storage Servers.
9. Use "Add Equipment" to add the ZFS Storage Controllers, starting from RU27.
10. Use drop down to add Exadata X9M Database Servers.
11. Use "Add Equipment" to add the ZFS Storage Trays, starting from RU31.
Which of these steps are correct and what is their correct order?

• A. 0
• B. 10, 8, 2, 5
• C. 10, 8, 9, 11
• D. 7,6,9,11
• E. 4,1, 6, 9

Answer: E

NEW QUESTION # 21
Which are two correct statements for managing virtual deployment using Oracle Exadata Deployment Assistant (OEDA)?

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

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 # 22
Which two statements are true for the Oracle Exadata Configuration Assistant (OECA)?

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

Answer: A,D

Explanation:
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.

NEW QUESTION # 23
What are two recommended configuration best practices for backup and recovery on Exadata?

• A. Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.
• B. The internal Recovery Appliance backup and restore processing is optimized when the RMAN FILESPERSET parameter is set to 1 for the level 1 incremental backup set.
• C. Placing the backup network on dedicated switches installed in the top of the rack (ToR) has the benefits of isolating the backup network from other workloads and providing a greater level of control.
• D. When off-site long-term backup retention is needed, use Oracle Database Backup Cloud Service as a low-cost, offsite scalable storage for a disaster recovery solution.

Answer: A,B

NEW QUESTION # 24
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 Enterprise Manager host pages for 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. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk
• D. OS I/O metrics using OS tools such as iostat on the database servers
• E. OS I/O metrics using OS tools such as iostat on the storage servers

Answer: A,C

Explanation:
1. OS I/O metrics using Enterprise Manager host pages for the storage servers: Enterprise Manager provides a detailed view of the storage server's performance including I/O metrics and statistics. You can use these metrics to analyze I/O performance and identify any bottlenecks.
2. cellcli (or exacli/exadcli) to examine storage server metrics such as database, category, ceiidisk, and griddisk: These commands are used to gather information about storage server performance, including I/O statistics, disk usage, and resource allocation.

NEW QUESTION # 25
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. When running a "yum update" for a new Exadata release, all other repositories should be disabled.
• C. Failed database server updates are rolled back to a working state on a previous release automatically.
• 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. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.

Answer: C,D

NEW QUESTION # 26
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 in both racks and one storage server in each rack
• B. on at least two storage servers in both racks
• C. on only one database server in both racks
• D. on all database servers and at least two storage servers in both racks
• E. on all database servers in the second rack
• F. on all storage servers in both racks
• G. on all database servers in the first rack

Answer: B,D

Explanation:
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).

NEW QUESTION # 27
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. CeLLCLI> list GRIDDISK where status != 'inactive' on the affected storage server
• B. CeLLCLI> alter cell shutdown SERVICES all on the affected storage server
• C. CellCLI alter GRIDDISK all inactive on the affected storage server
• D. 'crsct1 stop cluster -all' on one of the database servers
• E. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
• F. shutdown -h now' on the affected storage server

Answer: C,F

Explanation:
https://docs.oracle.com/en/engineered-systems/exadata-database-machine/dbmmn/maintaining-exadata-storage-servers.html#GUID-AE16A1DA-53C6-4E80-94E5-963AA65373AB The two commands that must be executed to safely power off the storage server in an Exadata X9M Database Machine are E and F.
Command E, CellCLI alter GRIDDISK all inactive, will deactivate all of the GRIDDISKS on the affected storage server. This will ensure that no data is lost during the power-off process.
Command F, shutdown -h now, will shut down the storage server. This will ensure that the storage server is completely powered off and no data is lost.
For more information on how to properly power off an Exadata Storage Server, refer to the Oracle Exadata Database Machine X9M Implementation Essentials official text book and resources [1][2].

NEW QUESTION # 28
What is the minimum Oracle Linux version required to support RoCE and Persistent Memory?

• A. Oracle Linux 8.0
• B. Oracle Linux 6.9
• C. Oracle Linux 7.5
• D. Oracle Linux 7.7

Answer: C

NEW QUESTION # 29
Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?

• A. Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk.
• B. For database servers, perform a server backup using patchmgr -dbnodes db_list_file -backup -rolling.
• C. Run the appropriate patchmgr preqequisite check step for each component being updated.
• D. Run exachk and resolve only WARNINGS that you have not seen before.
• E. Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release.
• F. Run patchmgr --all_comp -autofix -autobackup -upgrade -rolling.

Answer: B,C,E,F

NEW QUESTION # 30
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?

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

Answer: B,F

NEW QUESTION # 31
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. 1, 8, 7, 3 and 6
• B. 2, 8, 7, 3, and 6
• C. 4, 7, 8, 3, and 6
• D. 2, 7, 8, and 6
• E. 5, 8, 7, and 6

Answer: A

Explanation:
In order to power off an Exadata Database Machine in an orderly fashion, the commands should be executed in the following order: 1) Execute "crscti stop cluster -all" as the grid user from one database server; 2) Execute "shutdown -h now" on all database servers; 3) Power off all network switches; 4) Execute "shutdown -h now" on all Exadata storage servers; and 5) Power off the rack using the power switches on the PDUs. This sequence of commands ensures that all services running on the Exadata Database Machine are in a clean state before powering off the system. (Source: Oracle Exadata Database Machine X9M Implementation Essentials, page 543)

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

Answer: D,G,I

Explanation:
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.

NEW QUESTION # 33
Which three statements are true about Oracle Configuration Manager (OCM) for an Exadata Database Machine?

• A. Collected configuration information can be uploaded manually to Oracle.
• B. It is mandatory to install OCM on at least one database server.
• C. It is mandatory to install OCM on all database servers.
• D. Collected configuration information can be uploaded automatically to Oracle.
• E. It collects configuration information automatically.
• F. It collects configuration information on demand.

Answer: B,C,D

NEW QUESTION # 34
Which statement is true about the Persistent Memory Commit Accelerator?

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

Answer: D

Explanation:
Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk. This helps to further reduce redo log write latency by utilizing the speed and low latency of Persistent Memory, along with the Remote Direct Memory Access (RDMA) protocol, to commit changes to disk faster. This allows the system to quickly commit changes to disk, resulting in improved performance and reduced latency.

NEW QUESTION # 35
Which two quarantine types can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine?

• A. SQL Plan Quarantine
• B. Database Quarantine
• C. Disk Region Quarantine
• D. Manually created Quarantine
• E. Cell Offload Quarantine

Answer: B,D

NEW QUESTION # 36
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. Shutdown the Database Server if running.
• B. Add 32x 64GB DIMMs.
• C. Memory cannot be expanded on Exadata X9M-2 Database Servers.
• D. Add 24x 32GB DIMMs.
• E. Add 16x 32GB DIMMs.
• F. Add 12x 64GB DIMMs.
• G. Add 16x 64GB DIMMs.
• H. Add 12x 32GB DIMMs.
• I. Remove existing memory modules.

Answer: E,G,I

NEW QUESTION # 37
You are going to create an ACFS Filesystem for use as a staging area for data loads. Examine the following commands:

What steps and in which order should they be executed?

• A. 6, 1, 2, 7, 5, 8
• B. 6, 2, 1, 8, 4, 5
• C. 6, 8, 3, 4, 2, 1
• D. 6, 3, 1, 9, 7, 8

Answer: B

Explanation:
The steps and the order in which they should be executed to create an ACFS Filesystem for use as a staging area for data loads are:
asmcrad volcreate -G data -s 1024G acfs_dataload_vol : This command creates a new volume in the data diskgroup, with a size of 1024 GB, and named acfs_dataload_vol.
asmcmd vol info -G data acfs_dataload_vol | grep Device: This command will show the device name of the newly created volume
/usr/sbin/mkfs -t acfs /dev/asm/ac:fs_dataload_vol-123: This command creates a new ACFS filesystem on the volume created in step 1 sudo /u01/app/19.0.0.0/grid/bin/srvctl start filesystem -device /dev/asn/acfs_dataload_vol-123: This command starts the filesystem created in step 3 sudo chovn -R oracle:dba /mnt/acfs_dataload_vol: This command changes the ownership of the /mnt/acfs_dataload_vol to the oracle:dba user.
/sbin/acfsutil snap create -v data_load /mnt/acfs_dataload_vol: This command creates a snapshot of the filesystem to be used as a staging area.
acfsutil size +2S0G -d /dev/asm/acfs_dataload_vol-123 /mnt/acfs_dataload_vol/ : This command increases the size of the filesystem by 2GB
/u01/app/19-G.O-Q7grid/bin/srvctl add filesystem -device /dev/asm/acfs_dataload_vol-

NEW QUESTION # 38
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. 2,3,4,6,1,7,5
• B. 3,2,6,4,1,7,5
• C. 4,3,2,6,1,7,5
• D. 2,6,1,4,3,7,5
• E. 3,2,6,1,4,7,5

Answer: A

NEW QUESTION # 39
Which statement is true about the patching features provided in Platinum Services?

• A. Patching is done automatically during business hours.
• B. Oracle Platinum Service covers Exadata storage software and firmware patching, but customers must perform the database patching.
• C. The rolling and complete down time approaches are two options to patching.
• D. Patching services are available for the full software stack up to twice per year.

Answer: B

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

Answer: D

NEW QUESTION # 41
Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?

• A. For database servers, perform a server backup using patchmgr -dbnodes db_list_file -backup -rolling.
• B. Run exachk and resolve only WARNINGS that you have not seen before.
• C. Run the appropriate patchmgr preqequisite check step for each component being updated.
• D. Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release.
• E. Run patchmgr --all_comp -autofix -autobackup -upgrade -rolling.
• F. Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk.

Answer: B,C,D,F

Explanation:
According to Oracle.com documents or resources, the four actions that you should take before proceeding with applying updates to your Exadata Database Machine are:
A) Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release123.
B) Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk453.
C) Run exachk and resolve only WARNINGS that you have not seen before3.
D) Run the appropriate patchmgr preqequisite check step for each component being updated3.

NEW QUESTION # 42
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