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{2025} Oracle 1Z0-902 PDF Questions For Stress-free Exam Preparation

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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which statement is FALSE about the OEDA command line interface (OEDACU)?

A. OEDACU has Edit mode and Deploy mode.
B. Add or remove additional databases.
C. Resize Oracle ASM disk groups.
D. Add or remove Oracle Database home directories.
E. Add nodes to and remove nodes from a VM cluster.
F. Support ZDLRA life cycle management operation.

Answer: F

Explanation:
The Oracle Exadata Deployment Assistant Command Line Interface (OEDACU) supports a variety of configuration and lifecycle management tasks for Exadata systems, such as adding or removing nodes, resizing ASM disk groups, and managing Oracle Database home directories. However, it does not support lifecycle management for the Zero Data Loss Recovery Appliance (ZDLRA), as this device requires different management tools specific to its backup and recovery functions .

NEW QUESTION # 39
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. 'crsct1 stop cluster -all' on one of the database servers
B. shutdown -h now' on the affected storage server
C. CellCLI LIST GRIDDISK ATTRIBUTES name WHERE asmdeactivationoutcome != 'Yes' on the affected Storage server
D. CeLLCLI> alter cell shutdown SERVICES all 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

Answer: B,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].
https://support.oracle.com/knowledge/Oracle%20Database%20Products/1188080_1.html

NEW QUESTION # 40
Examine this list of software components:
1. Oracle KVM Guest
2. Oracle Enterprise Manager Agent (OMA)
3. ASM instance
4. RDBMS instance
5. Automatic Diagnostic Repository Command Interpreter (ADRCI)
6. CELLCLI
7. Cell Server(CELLSRV)
8. diskmon
9. Restart Server (RS)
10. Management Server (MS)
What is the correct location where these software components can run in the standard Exadata Database Machine deployment?

A. 1, 2, 3, 4, 8 and 9 run on the database servers; 5, 6, 7, 9 and 10 run on the Exadata storage servers.
B. 3, 4, 8, and 10 run on the database servers; 1, 2, 5, 6, 7 and 9 run on the Exadata storage servers.
C. 1, 2, 3, 4, 9 and 10 run on the database servers; 5, 6, 7, 8, 9, and 10 run on the Exadata storage servers.
D. 2, 3, 4, 8, and 10 run on the database servers; 1, 5, 6, 7and 9 run on the Exadata storage servers.
E. 1, 2, 3, 4, 5, 8, 9 and 10 run on the database servers; 5, 6,7, 9 and 10 run on the Exadata storage servers.

Answer: E

Explanation:
Oracle KVM Guest: This is a virtual machine that runs on top of Oracle Linux KVM hypervisor. It can be used to run Oracle Database or other applications on Exadata Database Machine2. Therefore, it runs on the Database Servers.
Oracle Enterprise Manager Agent (OMA): This is a software agent that communicates with Oracle Enterprise Manager Cloud Control and provides monitoring and management capabilities for Exadata Database Machine2. Therefore, it runs on both Database Servers and Storage Servers.
ASM instance: This is an instance of Oracle Automatic Storage Management (ASM), which is a volume manager and a file system for Oracle Database files. It manages disk groups that span across multiple Storage Servers2. Therefore, it runs on the Database Servers.
RDBMS instance: This is an instance of Oracle Database that processes SQL statements and executes transactions. It uses ASM disk groups to store data files, control files, redo log files, etc2. Therefore, it runs on the Database Servers.
Automatic Diagnostic Repository Command Interpreter (ADRCI): This is a command-line tool that enables you to view diagnostic data stored in the Automatic Diagnostic Repository (ADR). ADR is a file-based repository for database diagnostic data such as trace files, alert logs, etc2. Therefore, ADRCI runs on both Database Servers and Storage Servers, depending on where the ADR is located.
CELLCLI: This is a command-line interface that enables you to configure and manage Exadata Storage Server Software. It allows you to perform tasks such as creating disk groups, monitoring cell health, applying patches, etc2. Therefore, it runs on the Storage Servers.
Cell Server(CELLSRV): This is a process that runs on each Storage Server and handles I/O requests from the Database Servers. It implements Exadata Smart Scan , which offloads data-intensive SQL operations from the Database Servers to the Storage Servers2. Therefore, it runs on the Storage Servers.
diskmon: This is a process that monitors the status of disks and flash devices on each Storage Server. It reports disk failures and performs automatic disk reclamation2. Therefore, it runs on the Storage Servers.
Restart Server (RS): This is a process that manages automatic restarts of critical processes such as CELLSRV , MS , or OMA in case of failures. It also handles graceful shutdowns and startups of all processes on each server2. Therefore, it runs on both Database Servers and Storage Servers.
Management Server (MS): This is a process that provides management services for each server such as collecting metrics , logging events , executing commands from CELLCLI , etc2. Therefore, it runs on both Database Servers and Storage Servers

NEW QUESTION # 41
What are two recommended configuration best practices for backup and recovery on Exadata?

A. 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.
B. Even if the backup was limited to writing to four tape drives, eight channels could be specified to expedite the restore process.
C. 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.
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,C

Explanation:
A recommended configuration best practice for backup and recovery on Exadata is to place the backup network on dedicated switches installed in the top of the rack (ToR). This provides a greater level of control and isolates the backup network from other workloads. Additionally, even if the backup is limited to writing to four tape drives, it is recommended to specify eight channels to expedite the restore process.
Another best practice is to set the RMAN FILESPERSET parameter to 1 for the level 1 incremental backup set. This will optimize the internal Recovery Appliance backup and restore processing. Finally, if off-site long-term backup retention is needed, Oracle Database Backup Cloud Service should be used as a low-cost, offsite scalable storage solution for a disaster recovery solution.

NEW QUESTION # 42
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. There is no limit on the number of VMs in an Exadata rack as long as the Exadata rack has adequate resources.
C. OEDA allows customers to have both bare metal (BM) and virtual machine (VM) in an Exadata X9M Quarter Rack.
D. OEDA sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA.

Answer: A,C

NEW QUESTION # 43
......

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