Exam Passing Guarantee Apr 30, 2025 1Z0-902 Exam with Accurate Quastions!
Test Engine to Practice Test for 1Z0-902 Valid and Updated Dumps
Oracle Exadata Database Machine X8M is a powerful and efficient platform for running mission-critical database workloads. It is designed to provide high performance, scalability, and reliability for Oracle databases. The Exadata Database Machine X8M is a complete database platform that includes hardware, software, and storage components. It is designed to provide a high-performance, scalable, and reliable platform for running database workloads.
Oracle 1z1-902 certification exam is an excellent way for IT professionals to demonstrate their knowledge and skills in implementing and managing the Oracle Exadata Database Machine X8M. Passing 1Z0-902 exam not only validates their expertise but also opens up new career opportunities and helps them stay competitive in the ever-evolving IT industry.
NEW QUESTION # 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. 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. Install Oracle Rest Data Services on each Database server and install the MS APEX application.
- C. Install Oracle Rest Data Services on each Storage server and install the MS APEX application.
- D. The MS Process on the storage servers is natively endowed with REST services, but are not enabled by default.
Answer: A
Explanation:
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.
NEW QUESTION # 39
Which two options can be used to identify a damaged or failing flash card on an X9M-2 Database Machine High Capacity storage server?
- A. hardware monitoring using the storage server ILOM
- B. using the CELLCLI CALIBRATE command on the storage server after logging in as the celladmin user
- C. using the CELLCLI CALIBRATE command on the storage server after logging in as the root user
- D. using the CELLCLI list LUN DETAIL command as the celladmin user
Answer: A,B
Explanation:
The CELLCLI CALIBRATE command can be used to check the health of all flash cards in the storage server, and it should be run after logging in as the celladmin user. The hardware monitoring using the storage server ILOM should also be used to check for errors and other potential issues with the flash cards. The CELLCLI list LUN DETAIL command should not be used to identify a damaged or failing flash card, since it will not provide any information about the health of the flash card.
NEW QUESTION # 40
Which two quarantine types can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine?
- A. Cell Offload Quarantine
- B. SQL Plan Quarantine
- C. Manually created Quarantine
- D. Disk Region Quarantine
- E. Database Quarantine
Answer: C,E
NEW QUESTION # 41
Which three of the following options are available for database consolidation on Exadata?
- A. Multiple Databases on a cluster
- B. A single database with one or more schema per application
- C. Bare Metal deployment with one database per database server
- D. Multiple databases spanning a Bare Metal and Virtual Machine cluster to provide resource isolation and consolidation concurrently
- E. Multiple pluggable databases in one or more container databases on a Virtual Machine or Bare Metal cluster
- F. Multiple Virtual Machine clusters supporting a single database for greatest resource isolation
Answer: A,D,E
Explanation:
A Exadata supports multiple pluggable databases in one or more container databases, which enables database consolidation by allowing multiple databases to be consolidated into a single container database. This can be deployed on a Virtual Machine or Bare Metal cluster.
D Multiple databases spanning a Bare Metal and Virtual Machine cluster provide resource isolation and consolidation concurrently. It allows multiple databases to be deployed on both Bare Metal and Virtual Machine clusters, providing isolation and consolidation at the same time.
E Multiple Databases on a cluster allows multiple databases to be deployed on a single cluster, which enables consolidation of databases by reducing the number of clusters required.
NEW QUESTION # 42
Which two options can be used to identify a damaged or failing flash card on an X9M-2 Database Machine High Capacity storage server?
- A. hardware monitoring using the storage server ILOM
- B. using the CELLCLI CALIBRATE command on the storage server after logging in as the celladmin user
- C. using the CELLCLI list LUN DETAIL command as the celladmin user
- D. using the CELLCLI CALIBRATE command on the storage server after logging in as the root user
Answer: A,C
NEW QUESTION # 43
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. Add 16x 32GB DIMMs.
- D. Remove existing memory modules.
- E. Add 16x 64GB DIMMs.
- F. Add 12x 64GB DIMMs.
- G. Add 24x 32GB DIMMs.
- H. Memory cannot be expanded on Exadata X9M-2 Database Servers.
- I. Add 12x 32GB DIMMs.
Answer: B,D,E
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 # 44
Which two sections of the AWR report shows statistics for X9M Persistent Memory Cache?
- A. PMEM Pool cache Read Hits in the Cache Sizes portion of the Report Summary
- B. PMEM Pool Misses in the Exadata Outlier Summary
- C. cell PMEM cache Read Hits in the Database IOs portion of the Performance Summary
- D. PMEM Cache section within Memory Statistics
- E. PMEM Cache section within Exadata Smart 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
How do ASM failure groups provide redundancy?
- A. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
- B. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
- C. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
- D. Failure groups are created for each grid disk to ensure mirror copies are written to the same storage server for faster recovery after a physical disk failure.
Answer: A
Explanation:
According to Oracle's documentation12, ASM failure groups provide redundancy by storing mirror copies of data on different disks or storage servers. When ASM allocates an extent for a normal redundancy file, ASM allocates a primary copy and a secondary copy. ASM chooses the disk on which to store the secondary copy so that it is in a different failure group than the primary copy1. This way, if one disk or storage server fails, ASM can still access the data from another failure group2.
Therefore, the statement that is true about how ASM failure groups provide redundancy is:
Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
NEW QUESTION # 46
Which two steps concise the path used to communicate with Enterprise Manager from an Exadata Database Machine?
- A. SNMP traps for alerts are sent by the storage server ILOM to the storage server MS process.
- B. SNMP traps for alerts are sent by the storage server RS process to the Enterprise Manager agent.
- C. SNMP traps for alerts are sent by the storage server RS process to the storage server ILOM.
- D. SNMP traps for alerts are sent by the storage server ILOM to the storage server is process.
- E. SNM? traps for alerts are sent by the storage server ILOM to the Enterprise Manager agent.
- F. SNMP traps for alerts are sent by the storage server MS process to the storage server ILOM.
- G. SNMP traps for alerts are sent by the storage server MS process to the Enterprise Manager agent.
Answer: E,G
Explanation:
In an Exadata environment, the path of communication for SNMP traps involves:
Management Server (MS) Process to EM Agent: Alerts related to the storage server are generated by the MS process, which then forwards SNMP traps directly to the Enterprise Manager agent, allowing centralized monitoring and alert management.
ILOM to EM Agent: The ILOM on each Exadata storage server can independently send SNMP traps to the EM agent, providing additional hardware-level monitoring and alerting capabilities .
These pathways ensure that alerts from both hardware and software layers reach Enterprise Manager efficiently, supporting proactive management and rapid response to system issues.
NEW QUESTION # 47
Which three statements are true about the CELLCLI command?
- A. It can execute commands on multiple storage servers in parallel.
- B. It can be executed using the DCLI utility.
- C. It has command-line history.
- D. It can be executed on storage servers.
- E. It requires root privileges to create CELLDISKS and GRIDDISKS.
Answer: B,C,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.
NEW QUESTION # 48
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. Disk Region Quarantine
- C. Manually created Quarantine
- D. Cell Offload Quarantine
- E. Database Quarantine
Answer: A,D
Explanation:
A and E are the two correct quarantine types that can disable Smart Scan for multiple databases that offload SQL statements to a cell on an Exadata Database Machine. A is correct because SQL Plan Quarantine will disable Smart Scan for all queries related to the SQL plan that was placed in the SQL Plan Quarantine [1]. E is correct because the Cell Offload Quarantine will disable Smart Scan for all queries offloaded to Oracle Database Exadata Storage Server Software [2]. The other statements (B, C, and D) are incorrect.
[1] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book , Chapter 13 [1][2]: Oracle Database Exadata Storage Server Software [2] Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book , Chapter 15 [1][2]: Oracle Database Exadata Storage Server Configuration
NEW QUESTION # 49
Which are two correct statements about backing up Exadata Database Machine?
- A. Use a snapshot-based backup of an Oracle Exadata Database Machine database server software.
- 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. For high availability, system area can be on the first two disks and M.2 devices.
- D. Backing up Exadata Storage Server Software is critical for restoration.
- 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: D,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 # 50
Which are two valid reasons for executing an X9M-2 Exadata storage server rescue procedure?
- A. corruption in the / (root) filesystem
- B. corruption in a normal or high redundancy ASM diskgroup
- C. accidental loss of all data from all griddisks in a storage server
- D. the failure of physical disk 0 and 11
- E. moving all disks from one cell to another as part of a chassis-level component failure
- F. the failure of physical disk 1
- G. the failure of both physical M.2 disks
Answer: A,D
Explanation:
The rescue procedure is necessary when system disks fail, the operating system has a corrupt file system, or there was damage to the boot area. If only one system disk fails, then use CellCLI commands to recover. In the rare event that both system disks fail simultaneously, you must use the Exadata Storage Server rescue functionality provided on the Oracle Exadata Storage Server Software CELLBOOT USB flash drive.
NEW QUESTION # 51
You are monitoring PMEM cache to see if it is being used effectively with RDMA. Which two of these sources contain information about the RDMA I/O statistics?
- A. PMEM Cache User Reads section in AWR Report
- B. Database lOs section in AWR Report
- C. Database Statistics (v$ View)
- D. Exadata Metrics (LIST METRICCURRENT)
- E. PMEM Cache Space Usage section in AWR Report
Answer: A,D
Explanation:
To monitor the effectiveness of Persistent Memory (PMEM) cache usage with RDMA on Exadata, information on RDMA I/O statistics can be found in:
PMEM Cache User Reads section in the AWR Report: This section provides detailed statistics on PMEM read operations, including user reads that leverage RDMA for direct memory access from PMEM. These metrics help gauge the utilization and efficiency of the PMEM cache.
Exadata Metrics (LIST METRICCURRENT): By using the LIST METRICCURRENT command within the Exadata environment, real-time metrics related to PMEM usage and RDMA I/O statistics can be accessed. This provides an immediate view of the current performance and activity on Exadata's persistent memory components.
These tools together offer insights into PMEM cache usage and the effectiveness of RDMA for optimized data access.
NEW QUESTION # 52
Which two statements are true about enabling write-back flash cache?
- A. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
- B. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
- C. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) 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.
Answer: B,E
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 # 53
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 is on by default for High Capacity Storage Servers in High Redundancy configurations.
- C. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
- D. Before write-back flash cache is enabled, you need to drop the Flash Cache 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,D
NEW QUESTION # 54
Which two activities are supported on the storage servers in an Exadata Database Machine?
- A. upgrading the Storage Server software package using rpm
- B. upgrading a device driver for hard disks when inserting a replacement disk after a hard disk failure
- C. configuring secure shell user equivalency for the cellmonitor user
- D. changing the root password
- E. installing an alternative package manager
Answer: D,E
NEW QUESTION # 55
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 dcli 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 dcli command and manually execute it on each storage server using the DCLI command.
- D. Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
- E. Copy and execute the script on all storage servers using the EXACLI command.
Answer: E
NEW QUESTION # 56
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 must be invoked with the -rolling argument with all database and storage servers listed in a single input file.
- B. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.
- C. patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
- D. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.
Answer: A
NEW QUESTION # 57
An Exadata X9M-2 Elastic Rack with 4 Database Servers and 8 HC Storage Servers and 3-phase 24kVA 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 installation cannot proceed until two power feeds are available per PDU.
- B. 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.
- C. The installation can go ahead, no change is required.
- D. A splitter cable can be used to provide power to all PDU cables.
Answer: B
NEW QUESTION # 58
Which two statements are true about applying updates on Exadata systems?
- A. For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.
- B. When running a "yum update" for a new Exadata release, all other repositories should be disabled.
- C. Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum -exclude option.
- D. Failed database server updates are rolled back to a working state on a previous release automatically.
- E. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.
- F. Failed storage server updates are automatically rolled back to a previous release.
Answer: B,F
Explanation:
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.
NEW QUESTION # 59
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. 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 sets up key-based authentication for the root user by using the setuprootssh.sh utility included with OEDA.
Answer: B,D
Explanation:
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.
NEW QUESTION # 60
How do ASM failure groups provide redundancy?
- A. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
- B. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
- C. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
- D. Failure groups are created for each grid disk to ensure mirror copies are written to the same storage server for faster recovery after a physical disk failure.
Answer: C
NEW QUESTION # 61
Which two statements are true about Auto Service Request (ASR) with an Exadata Database Machine?
- A. ASR can upload configuration metadata to support problem resolution.
- B. ASR Manager opens a service request (SR) automatically after sensors detect hardware faults.
- C. ASR Manager must be installed and configured on a dedicated server external to the Database Machine.
- D. ASR Manager must be installed and configured on one of the database servers.
- E. Configuring ASR is mandatory for all Database Machine assets.
- F. ASR communicates with Oracle support services using HTTPS.
Answer: A,B
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 # 62
Which two statements are true about the IPTables firewall configuration on a new Exadata Database Machine after initial deployment?
- A. IPTables is installed and available but not configured or running on the database servers.
- B. IPTables is configured and running with Oracle-supplied rules on the storage servers.
- C. IPTables is configured and running with Oracle-supplied rules on the database servers.
- D. IPTables is installed and available but not configured on any server.
- E. IPTables is installed and available but not configured or running on the storage servers.
Answer: A,E
Explanation:
On Oracle Exadata Database Machine X9M, the default configuration of the IPTables firewall varies between storage servers and database servers:
Storage Servers: After initial deployment, IPTables is installed but remains in an unconfigured and inactive state. The Exadata storage servers focus on providing high availability and performance for database workloads and thus rely on internal security measures. The external firewall or network security policies typically handle firewall responsibilities, so IPTables is not actively configured on these servers by default.
Database Servers: Similar to storage servers, IPTables is also installed but neither configured nor running on the database servers. The Oracle Exadata Database Machine X9M emphasizes security through other means, such as its network isolation and dedicated interconnects. As part of Oracle's engineered systems design philosophy, the database servers are primarily focused on database performance, offloading much of the security management to other parts of the infrastructure and relying on data center-level firewalls for perimeter security.
To summarize, both database and storage servers have IPTables installed and available, but they are not configured or running by default on either server type. This setup allows Exadata environments to focus on optimized database performance while integrating with external network security solutions.
NEW QUESTION # 63
......
Exam Questions for 1Z0-902 Updated Versions With Test Engine: https://vcecollection.trainingdumps.com/1Z0-902-valid-vce-dumps.html
