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質問 # 53
What happens to the primary member in a MongoDB Server Cluster during the NDB patching process?
- A. It is skipped during the patching process to ensure no downtime.
- B. It is patched last and is restored to its original state.
- C. It becomes a read-only member during the patching process.
- D. It is patched first and then becomes a secondary member.
正解：B
質問 # 54
When provisioning an PostgreSQL HA Instance, what are the minimum and maximum number of DB server VMs that can be deployed in a cluster?
- A. Min 1. Max 3
- B. Min 3, Max 5
- C. Min 2, Max 6
- D. Min 2, Max 4
正解：D
解説：
When provisioning a PostgreSQL HA Instance using NDB, the minimum and maximum number of DB server VMs that can be deployed in a cluster are 2 and 4, respectively. A PostgreSQL HA Instance is a database instance that provides high availability and fault tolerance for PostgreSQL databases using the Patroni framework. Patroni is a Python-based tool that manages PostgreSQL configuration and performs automatic failover and switchover operations. Patroni relies on a distributed consensus store, such as etcd, Consul, or ZooKeeper, to store and synchronize the cluster state and leader information. NDB supports etcd as the consensus store for PostgreSQL HA Instances. NDB allows the administrator to provision PostgreSQL HA Instances with different sizes and configurations, such as small, medium, large, or custom. The size of the PostgreSQL HA Instance determines the number of DB server VMs, the number of etcd nodes, the CPU, memory, and disk resources, and the replication factor of the database.
The minimum number of DB server VMs for a PostgreSQL HA Instance is 2, which corresponds to a small size instance. This configuration provides one leader and one follower DB server VM, and one etcd node. The maximum number of DB server VMs for a PostgreSQL HA Instance is 4, which corresponds to a large size instance. This configuration provides one leader and three follower DB server VMs, and three etcd nodes. The other options are not valid for a PostgreSQL HA Instance, as they either do not provide enough redundancy or exceed the supported limit of DB server VMs.
Reference: Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Section 2 - Deploy and Configure an NDB Solution, Objective 2.2: Configure an NDB Instance Nutanix Database Management & Automation (NDMA) Course, Module 3: Nutanix Database Service (NDB) Installation and Configuration, Lesson 3.2: Configuring NDB, Topic: Provisioning PostgreSQL HA Instances Nutanix Database Service (NDB) User Guide, Chapter 4: Provisioning Databases, Section: Provisioning PostgreSQL HA Instances [PostgreSQL High Availability: Under the Hood - Nutanix.dev], Section:
PostgreSQL HAArchitecture and Components
質問 # 55
A user accidentally drops a table in the database at 10:42pm and the NDB administrator is tasked with restoring the table.
The snapshot schedule is set for every 30 minutes and the log catchup is set for every 15 minutes. The last available snapshot is at 10:30pm.
What is the optimal path to restore the table back with minimum data loss?
- A. Restore using point in time till 10:41pm.
- B. Restore using point in time till 10:42pm.
- C. Restore the 10:42pm snapshot.
- D. Restore the 10:30pm snapshot.
正解：A
質問 # 56
A database administrator wants to define initialization variables for different types of database engines and workloads, like OLTP and DW.
What type of profile would be used?
- A. Database Parameters
- B. Software Profile Version
- C. Network
- D. Compute
正解：A
質問 # 57
An administrator created a database clone that is scheduled for removal on the last day of the month.
A request has been received to keep the clone for an additional 14 days.
After selecting the desired clone, how should the administrator satisfy this task?
- A. Select Update and modify the Removal schedule.
- B. Update the Removal schedule to the end of the month.
- C. Remove the Removal schedule, then add the desired removal schedule.
- D. Update the Removal schedule to the desired date.
正解：A
解説：
The Removal schedule is a feature of Nutanix Era that allows you to specify when a database clone will be automatically deleted. You can modify the Removal schedule of an existing clone by selecting the clone from the Clones page, clicking on the Update button, and changing the Removal schedule option to the desired date. This way, you can extend or shorten the lifespan of a clone as per your requirements. You do not need to remove the existing Removal schedule and add a new one, as this would be an unnecessary step. You also do not need to update the Removal schedule to the end of the month, as this would not meet the request of keeping the clone for an additional 14 days.
Reference: Nutanix Database Management & Automation Training Course, Module 4: Protecting Databases Using Time Machine, Lesson 3: Cloning Databases, Slide 10: Clone Removal Schedule Nutanix Certified Professional - Database Automation (NCP-DB) 5 Exam, Section 5: Protect NDB-managed Databases Using Time Machine, Objective 5.3: Given business requirements, perform a database clone
質問 # 58
An administrator needs to perform LCM upgrades on an AHV cluster registered with NDB. The cluster hosts NDB-provisioned database server VMs that are part of a database server cluster.
What should the administrator do to allow the DB Server VMs to stay available while the cluster is being upgraded?
- A. Set VM-Host Affinity
- B. Unset VM-Host Affinity
- C. Update Nutanix Cluster
- D. Remove Nutanix Cluster
正解：B
質問 # 59
An administrator needs the ability to clone a source database to a point in time.
What is the lowest log frequency in minutes that can be configured in the Era IJI for log catchup operation?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
The log frequency in the Era IJI for log catchup operation can be configured to as low as 5 minutes. This allows the system to capture changes to the database at a high frequency, enabling more precise point- in-time recovery options. However, it's important to note that a higher frequency of log catchup operations can lead to increased system load. Therefore, the optimal frequency may vary depending on the specific requirements and capabilities of your system12. Please refer to the Nutanix Database Automation (NCP-DB) Learning documents for more detailed information.
質問 # 60
A database admin logs into Era to manage an Oracle Database VM and sees a message Update Available on the Status of the Software Profile Version.
What should the database admin do?
- A. Era autocratically updates the software profile to the latest version
- B. Schedule Ere to update the software profile to the latest version
- C. Create and update to the latest software profile version
- D. Manually update the software profile to the latest version
正解：D
解説：
In Nutanix Database Automation (NCP-DB), when an administrator logs into Era and sees a message
"Update Available" on the Status of the Software Profile Version, it indicates that a newer version of the software profile is available1. The administrator should manually update the software profile to the latest version12. This process ensures that the database VM is running the most recent and compatible version of the software12.
質問 # 61
How would an administrator enter the NDB command line to change the static IP address on the NDB VM?
- A. era
- B. arithmos cli
- C. cerebro_cli
- D. era-server
正解：D
質問 # 62
Which statement is true regarding the NDB alert retention feature?
- A. NDB supports retention at the grouped policy.
- B. NDB supports alert retention globally.
- C. NDB supports retention at the individual policy.
- D. NDB supports retention at the registered cluster.
正解：B
解説：
The NDB alert retention feature allows the database administrator to configure the duration for which the NDB alerts are stored and displayed in the NDB instance. The NDB alert retention feature supports alert retention globally, meaning that the same retention period applies to all the alerts generated by the NDB instance, regardless of the source cluster, policy, or operation. The database administrator can set the alert retention period from 1 day to 365 days, or choose to retain the alerts indefinitely. The NDB alert retention feature helps to manage the storage space and the visibility of the NDB alerts.
The NDB alert retention feature does not support retention at the individual policy, grouped policy, or registered cluster level. The NDB alert retention feature applies to all the alerts uniformly, and does not allow the database administrator to specify different retention periods for different policies or clusters.
Reference: Nutanix Database Management & Automation Training Course, Module 3: Nutanix Era Deployment, Lesson 3.2: Nutanix Era Deployment, slide 11.
Nutanix Database Management & Automation Training Course, Module 5: Nutanix Era Operations, Lesson 5.1: Nutanix Era Operations, slide 6.
質問 # 63
Which ports are used by the NDB database agent for API calls?
- A. 5985 and 9389
- B. 443 and 9440
- C. 3205 and 3260
- D. 443 and 8080
正解：B
解説：
The NDB database agent is a service that runs on each database server VM and communicates with the NDB instance. It uses port 443 for HTTPS API calls and port 9440 for Nutanix cluster API calls. These ports are required to be open on the database server VMs for NDB to function properly.
Reference: Nutanix Database Management & Automation (NDMA), page 9; Ports and Protocols Reference Chart | Nutanix Community, section "Nutanix Database Service (NDB)"
質問 # 64
An online retail application requires data to be synchronized between multiple SQL Server databases.
This provides clearer reporting from multiple databases at the Same time for consistency at the end of each business day.
What is the best way to fulfill this requirement?
- A. Have all the databases present in the same DBVM and register databases in Era with One Database with One Time Machine.
- B. Have all the databases in the same Availability Group and register databases in Era.
- C. Have all the databases present in the same DBVM and register databases in Era.
- D. Have all the databases present in the same DBVM and register databases in Era with Multiple Databases as a Group with one Time Machine.
正解：D
解説：
Nutanix Era enables you to clone your source databases and refresh the database clones by using snapshots or transaction logs1. For an online retail application that requires data to be synchronized between multiple SQL Server databases, having all the databases present in the same Database Virtual Machine (DBVM) and registering them in Era with Multiple Databases as a Group with one Time Machine would be the most efficient way to fulfill this requirement1. This approach allows for clearer reporting from multiple databases at the same time for consistency at the end of each business day1.
質問 # 65
A development team has requested that an administrator provide them a copy of the production Finance database. The business requires that any financial data is masked before going into development.
How should the administrator create a clone with masked data for the development environment?
- A. 1. Create a masking script on the source DB VM, Dev VM or SW Profile VM.
2. Create the clone from the Time Machine and define the post-clone option with the full path\name of the masking script. - B. From the Time Machine, create a clone and paste the masking commands in the post-clone field of the Pre-Post Commands section.
- C. 1. Create a script to mask the data.
2. Create the clone from the Time Machine and define the post-clone option with the full path\name of the masking script. - D. From the Time Machine, create a clone and paste the masking commands in the pre-clone field of the Pre-Post Commands section.
正解：A
解説：
According to the Nutanix Database Automation (NCP-DB) course, the Pre-Post Commands section allows the administrator to specify custom scripts that can be executed before or after the clone operation1. The masking script can be created on any of the VMs that have access to the source database, such as the source DB VM, the Dev VM, or the SW Profile VM2. The script should contain the commands to mask the sensitive data in the Finance database, such as replacing the real values with dummy values or encrypting the data2. The administrator can then create the clone from the Time Machine and define the post-clone option with the full path and name of the masking script1. This will ensure that the script is executed after the clone is created, and the data is masked before it is available for the development team1. The other options are not correct, as they either use the wrong field (pre- clone instead of post-clone), or do not specify where to create or store the masking script.
Reference: 1: Nutanix Database Automation (NCP-DB) course, Module 4: Database Cloning, Lesson
4.4: Pre-Post Commands, slide 5
2: Nutanix Database Automation (NCP-DB) course, Module 4: Database Cloning, Lesson 4.4: Pre-Post Commands, slide 7
質問 # 66
Which action should be completed before updating Oracle Database software?
- A. Verify CVMs have the required memory allocated.
- B. Download the PSU from Oracle support.
- C. Verify the Oracle OS version is supported on AHV.
- D. Perform rolling reboots of the Oracle Database VMs.
正解：C
質問 # 67
An administrator is trying to register a Nutanix cluster for Multi-Cluster provisioning.
The Era cluster is setup with following configuration:
* Era Multi-Cluster is enabled.
Era Server storage container and Era provisioning container are different on the Era cluster.
What should the administrator configure?
- A. Storage mapping between Era container and a remote container that is not used for provisioning databases.
- B. Storage mapping between Era server container end remote container thet is used for provisioning DBs,
- C. Disks that span across Era Server storage container and Era provisioning container.
- D. Separate remote containers for provisioning Era Agent VM end database Server VMs.
正解：B
解説：
In a Nutanix Era setup where Multi-Cluster is enabled and the Era Server storage container and Era provisioning container are different on the Era cluster, the administrator should configure a storage mapping between the Era server container and the remote container that is used for provisioning databases1. This is because Nutanix Era uses the storage container specified during the registration of the Nutanix cluster for provisioning databases1. Therefore, a storage mapping needs to be established between the Era server container and the remote container used for provisioning to ensure that the databases are provisioned correctly1.
質問 # 68
Which two statements best describe the features and functionality of Era Oracle patching? (Choose two.)
- A. Era Oracle fleet patching can be rolled back if issues ere encountered after successful patching.
- B. Era does not require native Oracle Utility OpatchAuto to create the patch profile,
- C. Era patching for Oracle databases has automatic rollback if any of the steps in the patching workflow fails.
- D. Era patching can be automated using REST API/CLI for scheduled patching many Oracle servers in a fleet patching scenario,
正解：C、D
解説：
Nutanix Era provides a unified database operating model that delivers simplicity, performance, availability, and security across private and public clouds1. It standardizes your Oracle database ecosystem by mass patching the databases with one-click simplicity2. This includes the following features:
Automated Patching: Era patching can be automated using REST API/CLI for scheduled patching many Oracle servers in a fleet patching scenario1. This allows for the standardization of your Oracle database ecosystem by mass patching the databases with one-click simplicity2.
Automatic Rollback: Era patching for Oracle databases has automatic rollback if any of the steps in the patching workflow fails1. This ensures that your databases remain secure and functional even if an issue arises during the patching process1.
質問 # 69
An administrator has a production PostgreSQL database cloned for development and testing purpose. A new table is added to the source database.
What should the administrator do to publish the update leveraging the point in Time Era capability?
(C) 1. PeHorm a Log Catch-up using source database Time Mechine 2. Refresh the clone database (C) 1. Perform a Log Catch-up using source database Time Mechine
2. Refresh the source database
(C) l. update Log Catch-up interval from Tme Machine 2. Refresh the source database C) 1. Update Log Catch-up interval from Tame Machine 2. Refresh the clone database How is the size of a database time machine defined?
- A. The size of all snapshots and clones maintained by Era
- B. Only the size of all reclaimable snapshots maintained by Era
- C. The size of all snapshots and/or transaction logs maintained by Era
- D. Only the size of all transaction logs maintained by Era
正解：C
解説：
The Nutanix Era platform provides a feature called Time Machine, which is designed to manage the lifecycle of database copies and clones1. When a new table is added to the source database, the administrator should perform a Log Catch-up using the source database's Time Machine. This action ensures that the Time Machine captures the latest state of the source database, including the newly added table1. After performing the Log Catch-up, the administrator should refresh the clone database.
The refresh operation updates the clone with the latest state captured by the Time Machine, thereby publishing the new table to the clone1.
質問 # 70
An administrator needs to provide the least-privilege access to a newly-hired engineer whose task is to add new VLANs or IP Pools in NDB.
Which role should the administrator select to complete this task?
- A. Super Administrator
- B. Infrastructure Administrator
- C. Database Administrator
- D. Database Infrastructure Administrator
正解：B
解説：
An Infrastructure Administrator is a role in NDB that has the permission to manage network and storage resources, such as VLANs, IP Pools, and Storage Containers. This role is suitable for the engineer who needs to add new VLANs or IP Pools in NDB. The other roles have either more or less privileges than required for this task. A Database Administrator can manage databases and database server VMs, but not network and storage resources. A Super Administrator can manage all aspects of NDB, but this is more than the least-privilege access needed. A Database Infrastructure Administrator can manage both databases and network and storage resources, but this is also more than the least-privilege access needed.
Reference: Nutanix Support & Insights, section "NDB Roles and Permissions"
質問 # 71
An administrator enables NDB Multi-Cluster on Cluster A. Cluster B is then registered with NDB.
What are the different NDB Service VMs present in each Nutanix cluster?
- A. Cluster A: 1 NDB Server, 1 NDB Agent
Cluster B: 1 NDB Agent - B. Cluster A: 1 NDB Server
Cluster B: 1 NDB Agent - C. Cluster A: 1 NDB Agent
Cluster B: 1 NDB Server - D. Cluster A: 1 NDB Agent
Cluster B: 1 NDB Server, 1 NDB Agent
正解：A
解説：
NDB Multi-Cluster is a feature that allows multiple Nutanix clusters to share a common NDB service for database management and automation. NDB service consists of two components: NDB Server and NDB Agent. NDB Server is the central component that provides the web UI, REST API, and database orchestration logic. NDB Agent is the component that runs on each Nutanix cluster and communicates with the NDB Server to perform database operations.
When NDB Multi-Cluster is enabled on Cluster A, it becomes the primary cluster that hosts the NDB Server VM. Cluster B, which is registered with NDB, becomes a secondary cluster that hosts only the NDB Agent VM. Therefore, Cluster A has both NDB Server and NDB Agent, while Cluster B has only NDB Agent. This configuration allows Cluster B to leverage the NDB service running on Cluster A for database management and automation.
Reference: Nutanix Database Automation (NCP-DB) Course Details, Section 3.1: NDB Multi-Cluster Overview Nutanix Database Automation (NCP-DB) Certification Details, Objective 3.1: Configure NDB Multi-Cluster Nutanix Database Automation (NCP-DB) YouTube Playlist, Video 3.1: NDB Multi-Cluster Overview
質問 # 72
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