2024年最新のNCP-DB試験問題集で最近更新された77問題 [Q35-Q57]

2024年最新のNCP-DB試験問題集で最近更新された77問題

Nutanix NCP-DBリアル2024年最新のブレーン問題集で模擬試験問題集

質問 # 35
An administrator needs to patch a PostgreSQL database server VM from version 13.4 to 13.8.
What is the first step within the NDB patching workflow to accomplish this task?

• A. Create a Software Profile Version with PostgreSQL 13.8.
• B. Create a new Software Profile with PostgreSQL 13.8.
• C. Create a new Database Parameters profile for PostgreSQL server 13.8.
• D. Create a maintenance window and add this PostgreSQL server 13.8 to the queue.

正解：A

解説：
NDB supports patching for PostgreSQL database instances. Patching for PostgreSQL is validated on VMs provisioned by NDB (greenfield deployments). To patch PostgreSQL database server VMs, you must create a software profile version by uploading the PostgreSQL update file in NDB. You can then use the PostgreSQL update to patch other database server VMs or provision a new database server VM with the updated software profile. The first step in the NDB patching workflow is to create a software profile version with the desired PostgreSQL version.
References:
* Nutanix Database Automation (NCP-DB) Course Details, Section 4.1: NDB Patching Overview
* Nutanix Database Automation (NCP-DB) Certification Details, Objective 4.1: Perform Database Patching
* Nutanix Database Automation (NCP-DB) YouTube Playlist, Video 4.1: NDB Patching Overview
* Nutanix Database Automation (NCP-DB) User Guide, Section 4.4: Patch PostgreSQL Database Software

質問 # 36
What happens to the primary member in a MongoDB Server Cluster during the NDB patching process?

• A. It is patched first and then becomes a secondary member.
• B. It is skipped during the patching process to ensure no downtime.
• C. It becomes a read-only member during the patching process.
• D. It is patched last and is restored to its original state.

正解：A

解説：
According to the NDB documentation, the NDB patching process for MongoDB Server Cluster follows these steps1:
* NDB identifies the primary member of the MongoDB Server Cluster and patches it first.
* NDB triggers a failover to elect a new primary member from the remaining secondary members.
* NDB patches the former primary member, which becomes a secondary member after the failover.
* NDB patches the remaining secondary members one by one.
* NDB verifies the patching status and the cluster health.
This process ensures that the MongoDB Server Cluster always has a primary member available to handle write operations, while minimizing the downtime and the impact on the cluster performance.
References: Nutanix Support & Insights, section "Patching a MongoDB Server Cluster"

質問 # 37
An administrator needs to add a stretched VLAN across two clusters in NDB Which two prerequisites should be met prior to completing this action? (Choose two.)

• A. VLAN must be IPAM.
• B. VLAN must be static.
• C. Nutanix Cluster Management must be enabled.
• D. Both clusters must be registered in NDB.

正解：B、D

解説：
A stretched VLAN is a virtual network that spans across multiple Nutanix clusters and allows the communication between VMs on different clusters using the same subnet. A stretched VLAN can be used to provide high availability and load balancing for NDB components, such as HAProxy VMs, that require a virtual IP address (VIP) to beaccessible from any cluster. To add a stretched VLAN across two clusters in NDB, the administrator needs to meet two prerequisites: the VLAN must be static and both clusters must be registered in NDB. A static VLAN is a VLAN that is manually created and configured by the administrator, as opposed to an IPAM VLAN that is automatically created and managed by NDB. A static VLAN can be added to a stretched VLAN in NDB, while an IPAM VLAN cannot. Both clusters must be registered in NDB before adding a stretched VLAN, as NDB needs to have the information and access to the clusters and their networks.
The administrator can register the clusters in NDB using the Prism Element details, agent network configuration, and storage container information. The other option, Nutanix Cluster Management, is not a prerequisite for adding a stretched VLAN in NDB. Nutanix Cluster Management is a feature that allows the administrator to manage multiple Nutanix clusters from a single NDB UI, such as creating or deleting clusters, adding or removing nodes, or performing cluster operations. Nutanix Cluster Management is not required for adding a stretched VLAN, as the VLANs are created and configured in Prism Element, not in NDB. References:
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Section 2 - Deploy and Configure an NDB Solution, Objective 2.3: Configure NDB High Availability
* Nutanix Database Management & Automation (NDMA) Course, Module 3: Nutanix Database Service (NDB) Installation and Configuration, Lesson 3.3: Configuring NDB High Availability, Topic: NDB HA Architecture and Components
* Nutanix Database Service High Availability Deployment Overview, Section: HAProxy VMs and Stretched VLANs
* [Configuring a Virtual NIC to Operate in Access or Trunk Mode - Nutanix], Section: Creating a vNIC in Access or Trunk Mode

質問 # 38
How does NDB send notifications when alerts are generated?

• A. SNMP
• B. Pulse
• C. Email
• D. APIs

正解：C

解説：
NDB sends notifications when alerts are generated via email. The email notifications can be configured to send to one or more recipients, and can be customized to include the alert severity, category, description, and resolution steps. The email notifications help to inform the database administrator and other stakeholders about the status and issues of the NDB-managed databases and operations.
NDB does not send notifications via SNMP, APIs, or Pulse. SNMP is a protocol for collecting and organizing information about managed devices on a network. APIs are interfaces for communicating and exchanging data between different applications or systems. Pulse is a feature of the Nutanix cluster that collects and sends diagnostic and usage data to Nutanix for analysis and support.
References:
* 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.
* Nutanix Database Management & Automation Training Course, Module 5: Nutanix Era Operations, Lesson 5.2: Nutanix Era Alerts and Notifications, slides 5-7.

質問 # 39
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. Database Administrator
• B. Infrastructure Administrator
• C. Database Infrastructure Administrator
• D. Super 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.
References: Nutanix Support & Insights, section "NDB Roles and Permissions"

質問 # 40
What is the purpose of Data Access Management policies in NDBMulti-Cluster?

• A. To remove data accessibility of a time machine across all registered Nutanix clusters in NDB
• B. To perform snapshot operations on a single Nutanix cluster
• C. To register multiple Nutanix clusters in NDB
• D. To manage time machine data availability across all registered Nutanix clusters in NDB

正解：D

解説：
Data Access Management (DAM) policies are a feature of NDB Multi-Cluster that allows you to control the access and availability of time machine data across different Nutanix clusters. You can use DAM policies to specify which clusters can access the time machine data of a source database, and which clusters can replicate the time machine data for backup or disaster recovery purposes. DAM policies help you to optimize the storage and network resources, as well as ensure the security and compliance of your database workloads. The purpose of DAM policies is not to register multiple Nutanix clusters in NDB, as this is done by using the Add Cluster option in the NDB settings page. The purpose of DAM policies is also not to perform snapshot operations on a single Nutanix cluster, as this is done by using the Time Machine feature in the NDB dashboard. The purpose of DAM policies is also not to remove data accessibility of a time machine across all registered Nutanix clusters in NDB, as this is done by using the Delete option in the Time Machine page. References:
* Nutanix Database Management & Automation Training Course, Module 6: Managing NDB Multi-Cluster, Lesson 2: Data Access Management Policies, Slide 3: Data Access Management Policies
* Nutanix Certified Professional - Database Automation (NCP-DB) 5 Exam, Section 6: Administer an NDB Environment, Objective 6.5: Apply procedural concepts to create Data Access Management (DAM) policies

質問 # 41
What is the first step to install NDB on a Nutanix AHV cluster?

• A. Open Prism Central and enable the NDB VM in the settings menu.
• B. Run LCM update to get the latest version of NDB.
• C. Download the QCOW2 image file of NDB and upload it to Prism Element.
• D. NDB is offered as a SaaS service and doesn't require any installations.

正解：C

解説：
To install NDB on a Nutanix AHV cluster, you need to download the QCOW2 image file of NDB from the Nutanix Support Portal and upload it to Prism Element. This image file contains the NDB software and the CentOS operating system. After uploading the image, you need to create a VM from the image and configure the network settings. Then, you need to register the NDB VM with Prism Central and enable the NDB service in the settings menu. References: Nutanix Support & Insights, Professional Services: NDB Database Cloning

質問 # 42
How can HA drivers for a Database VM be upgraded?

• A. Database software patching
• B. Database VM OS patching
• C. LCM driver upgrade
• D. One-click software upgrade

正解：C

解説：
HA drivers are software components that enable high availability features for database VMs, such as failover, fencing, and heartbeat. HA drivers can be upgraded using the Life Cycle Management (LCM) feature of Nutanix Prism. LCM can detect the available updates for HA drivers and apply them to the database VMs in a non-disruptive manner. LCM can also perform health checks and pre-upgrade validations to ensure the successful completion of the upgrade process. One-click software upgrade is a feature of Nutanix Era that allows you to upgrade the Era software itself, not the HA drivers. Database VM OS patching is a feature of Nutanix Era that allows you to patch the operating system of the database VMs, not the HA drivers. Database software patching is a feature of Nutanix Era that allows you to patch the database software of the database VMs, not the HA drivers. References:
* Nutanix Database Management & Automation Training Course, Module 2: Deploying and Configuring an NDB Solution, Lesson 3: Configuring NDB High Availability, Slide 9: HA Driver Upgrade
* Nutanix Certified Professional - Database Automation (NCP-DB) 5 Exam, Section 4: Operate and Maintain an NDB Environment, Objective 4.4: Upgrade databases

質問 # 43
Which ports must be open between the NDB server and Controller VMs to facilitate iSCSI connections?

• A. 22 and 9440
• B. 80 and 443
• C. 3205 and 3260
• D. 5985 and 5986

正解：C

解説：
According to the Nutanix Database Automation (NCP-DB) course, the ports 3205 and 3260 are required for iSCSI connections between the NDB server and the Controller VMs1. Port 3205 is used for the NDB iSCSI initiator service, which initiates the iSCSI sessions and sends SCSI commands to the Controller VMs1. Port
3260 is used for the iSCSI target service, which listens for incoming iSCSI requests and provides access to the storage devices on the Controller VMs1. The other options are not related to iSCSI connections. Port 22 is used for SSH, port 9440 is used for Prism Central, port 80 is used for HTTP, port 443 is used for HTTPS, port
5985 is used for WinRM HTTP, and port 5986 is used for WinRM HTTPS2. References:
* 1: Nutanix Database Automation (NCP-DB) course, Module 2: Database Provisioning, Lesson 2.2:
Database Engine Installation, slide 13
* 2: Nutanix NCP-DB Certification Exam Sample Questions, Question 18, Answer

質問 # 44
What is used to temporarily store the transaction logs of the source database before they are copied to the log?

• A. NDB Drive
• B. Time Machine
• C. NDB Profiles
• D. Database Agent

正解：D

解説：
The Database Agent is used to temporarily store the transaction logs of the source database before they are copied to the log. This is a critical component for ensuring data consistency and recovery in database operations.References:Nutanix Database Automation documentation, focusing on database agents and their roles in transaction log management.

質問 # 45
An administrator needs to distribute NDB management plane components.
Which NDB HA VM needs to be deployed on the same L2 network?

• A. NDB Agent
• B. Repository VMs
• C. HA Proxy VMs
• D. API Server

正解：C

解説：
NDB High Availability (HA) is a feature that ensures the availability and reliability of the NDB management plane components, such as the API Server, the Repository VMs, and the NDB Agents. To enable NDB HA, you need to deploy at least three HA Proxy VMs on the same L2 network as the NDB Server VM. The HA Proxy VMs act as load balancers and health monitors for the NDB management plane components, and they also provide a single endpoint for accessing the NDB APIs and UI. References:
* Nutanix Certified Professional - Database Automation (NCP-DB), Section 2 - Deploy and Configure an NDB Solution
* Database (NCP-DB) Exam Blueprint Guide - Nutanix, Page 7, Objective 2.3
* Nutanix Database Management & Automation (NDMA) course, Module 2, Lesson 2.3 - NDB High Availability

質問 # 46
When trying to restore a database via Time Machine (TM), the option to restore data to a Point in Time is not available.
What should the administrator do to enable Point in Time Recovery?

• A. Update the TM schedule to perform DB Log catch up.
• B. Use Brass SLA & update the Log catch up frequency.
• C. Take a Manual snapshot and use it for DB recovery.
• D. Use an SLA that supports Continuous Log retention.

正解：D

解説：
Point in Time Recovery (PITR) is a feature of NDB that allows restoring a database to any point in time within the retention period of the SLA. To enable PITR, the SLA must support Continuous Log retention, which means that NDB captures and stores the database logs continuously. This allows NDB to replay the logs from the last snapshot to the desired point in time during the restore process. The other options do not enable PITR, but rather affect the frequency and timing of the snapshots and log catch up operations.
References: Nutanix Support & Insights, section "NDB Time Machine Point in Time Recovery"

質問 # 47
An administrator needs to maintain five days of time-travel capability to any second, plus an additional seven days of discrete recovery at a daily interval.
How should the administrator define the Frequency and retention on the SLA?

• A. * Continuous log retention (days): 5
  * Weekly snapshot retention (weeks): 1
• B. * Weekly snapshot retention (weeks): 1
  * Continuous log retention (days): 7
• C. * Daily snapshot retention (days): 7
  * Continuous log retention (days): 5
• D. * Continuous log retention (days): 7
  * Daily snapshot retention (days): 5

正解：C

解説：
The correct answer is D because it meets the requirements of maintaining five days of time-travel capability to any second and an additional seven days of discrete recovery at a daily interval. Continuous log retention allows the administrator to restore the database to any point in time within the specified number of days, while snapshot retention allows the administrator to restore the database to a specific point in time at a fixed interval.
Therefore, by setting the daily snapshot retention to 7 days, the administrator can ensure that there is a discrete recovery point for each day of the week. By setting the continuous log retention to 5 days, the administrator can ensure that there is a time-travel capability to any second within the last five days. The other options do not meet the requirements because they either have less than five days of continuous log retention or less than seven days of snapshot retention. References: Nutanix Database Management & Automation (NDMA) course, Nutanix Certified Professional - Database Automation (NCP-DB) certification, Nutanix NCP-DB Certification Exam Syllabus and Study Guide, Nutanix Certified Professional - Database Automation (NCP-DB) datasheet

質問 # 48
What is required to create an NDB Software Profile Version for PostgreSQL?

• A. Patch file for the installed databases
• B. Installer package for database software
• C. Preconfigured OS image from Prism Element
• D. Database server VM registered with NDB

正解：B

解説：
To create an NDB Software Profile Version for PostgreSQL, it is required to have an installer package for the database software. This package forms the basis of the software profile,enabling the deployment and management of PostgreSQL instances.References:Nutanix Database Automation documentation, particularly in the area of software profile creation and management for PostgreSQL.

質問 # 49
An administrator needs to take multiple snapshots per day and retain them for one week. How should the administrator define and schedule the SLA?

• A. * Weeklysnapshot retention: 1 week
  * Daily Snapshot at: 2
• B. * Weeklysnapshot retention: 1 week
  * Snapshots per Day: 2
• C. * Daily snapshot retention: 7 days
  * Daily snapshot at: 2
• D. * Daily snapshot retention: 7 days
  * Snapshots per Day: 2

正解：D

解説：
The correct answer is D because it matches the requirement of taking multiple snapshots per day and retaining them for one week. Option A is incorrect because it only takes one snapshot per day, which is not enough for the administrator's need. Option B is incorrect because it only retains the snapshots for one week, which means the older snapshots will be deleted after seven days. Option C is incorrect because it only takes two snapshots per week, which is not frequent enough for the administrator's need.
References: The following sources provide more information about the SLA retention policies and how to create and modify them in NDB:
* Nutanix Database Management & Automation (NDMA) course, Module 4: Protecting Databases Using Time Machine, Lesson 4.1: Creating and Modifying SLA Retention Policies
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Knowledge Objectives, Section
5 - Protect NDB-managed Databases Using Time Machine
* Nutanix Database Service (NDB) User Guide, Chapter 6: Protecting Databases Using Time Machine, Section 6.1: Creating and Modifying SLA Retention Policies

質問 # 50
How would an administrator enter the NDB command line to change the static IP address on the NDB VM?

• A. era-server
• B. cerebro_cli
• C. era
• D. arithmos cli

正解：B

解説：
To change the static IP address on the NDB VM, an administrator would need to enter the NDB command line using the cerebro_cli command. The cerebro_cli command is used to access the Cerebro service, which is responsible for managing the NDB instance and its components. The cerebro_cli command can be run from the NDB VM or from any other VM that has network connectivity to the NDB VM. The cerebro_cli command has various subcommands and options to perform different tasks, such as changing the IP address, hostname, password, or certificate of the NDB VM. To change the static IP address, the administrator would need to use the cerebro_cli network update subcommand with the appropriate parameters, such as the new IP address, netmask, gateway, and DNS servers. The cerebro_cli network update subcommand also requires the administrator to provide the current password of the NDB VM for authentication. After changing the IP address, the administrator would need to restart the NDB VM for the changes to take effect. References:
* 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: Changing the IP Address of the NDB VM
* Nutanix Database Service (NDB) Command Line Interface Guide, Chapter 2: Cerebro CLI, Section:
cerebro_cli network update

質問 # 51
Refer to the exhibit.

An administrator is receiving critical NDB email alerts regarding storage for the DBA database, which is a member of a database group.
How would the administrator remediate the issue within NDB?

• A. From the Alerts page, select the alert, choose Set Status to Resolved, and Scale the storage via the Resolve Now dialogue box.
• B. From the Database Summary page for the DBA database, use the Scale option to grow the storage accordingly.
• C. From the Databases page, select the Database group and Scale the storage from the Database Actions menu.
• D. From Prism Central, add additional storage to the VM, then expand the log storage via the database tools.

正解：B

解説：
The administrator can remediate the issue of critical storage alerts by scaling up the storage directly from the Database Summary page for that specific DBA database. This action allows for an increase in storage capacity to alleviate space constraints and prevent future critical alerts related to storage space1. The other options are not correct, as they either involve scaling the entire database group, which may not be necessary or desired, or require additional steps outside of NDB, which may not be feasible or efficient. References:
* 1: Nutanix Database Automation (NCP-DB) course, Module 2: Database Provisioning, Lesson 2.4:
Database Scaling, slide 5

質問 # 52
An administrator needs to deploy a cumulative update (CU) for SQL Server.
What steps would the administrator take to prepare this deployment with NDB?

• A. Apply the patch to the profile VM, delete the existing Software Profile and create a new Software Profile using the profile VM as the source.
• B. Apply the patch to the profile VM, then create a new Software Profile version using the profile VM as the source.
• C. Create a new Software Profile version using the CU executable and publishthatversion.
• D. Create a new Software Profile using the CU executable and publish that profile.

正解：B

解説：
The correct answer is C because it follows the recommended procedure for applying a CU to a SQL Server Software Profile in NDB. By applying the patch to the profile VM, the administrator ensures that the CU is compatible with the existing Software Profile settings and configuration. By creating a new Software Profile version, the administrator preserves the previous version of the Software Profile for rollback purposes and allows the new version to be tested and published. Option A is incorrect because it deletes the existing Software Profile, which may cause data loss and prevent rollback. Option B is incorrect because it does not apply the patch to the profile VM, which may result in errors or inconsistencies in the Software Profile. Option D is incorrect because it creates a new Software Profile instead of a new version, which may cause confusion and duplication.
References: The following sources provide more information about the Software Profile management and patching in NDB:
* Nutanix Database Management & Automation (NDMA) course, Module 5: Patching Databases Using NDB, Lesson 5.2: Creating and Modifying Software Profiles
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Knowledge Objectives, Section
4 - Operate and Maintain an NDB Environment
* Nutanix Database Service (NDB) User Guide, Chapter 5: Patching Databases Using NDB, Section 5.2:
Creating and Modifying Software Profiles
* Nutanix Database Service (NDB) User Guide, Chapter 5: Patching Databases Using NDB, Section 5.3:
Testing and Publishing Database Patches

質問 # 53
What is purpose of the NDB Database Agent service?

• A. Contains an instance of the database engine software.
• B. Hosts one or more source databases for the same time machine.
• C. Temporarily stores the transaction logs.
• D. Schedules and monitors the NDB-related operations.

正解：D

解説：
The correct answer is C because the NDB Database Agent service is responsible for scheduling and monitoring the NDB-related operations, such as provisioning, patching, cloning, and restoring databases. The NDB Database Agent service is deployed on the NDB server and on each of the database server VMs provisioned by NDB. It contains the tools required to perform each task and communicates with the NDB server through the NDB API. The other options are not correct because they describe different components or functions of the NDB solution. Option A is not correct because the transaction logs are not stored by the NDB Database Agent service, but by the NDB Time Machine service, which is a distributed file system that stores the database snapshots and logs. Option B is not correct because the source databases are not hosted by the NDB Database Agent service, but by the database server VMs, which are virtual machines that contain an instance of the database engine software and the database files. Option D is not correct because the NDB Database Agent service does not contain an instance of the database engine software, but only the tools required to perform the NDB-related operations. The database engine software is installed on the database server VMs, which are provisioned by NDB using the profiles defined by the administrator. References: Nutanix Database Management & Automation (NDMA) course, Nutanix Certified Professional - Database Automation (NCP-DB) certification, Nutanix NCP-DB Certification Exam Syllabus and Study Guide, Nutanix Support & Insights

質問 # 54
An administrator needs to register a SQL Server Single Node Database Server VM with NDB.
Which condition must exist prior to the administrator completing this task?

• A. The SQL service account should not have read privileges on the mount points.
• B. SQL Server instance must be in single-user mode.
• C. The login account provided must be a member of the sysadmin role.
• D. Database files must exist in the Windows OS boot drive.

正解：C

解説：
Before registering a SQL Server Single Node Database Server VM with NDB, it is necessary that the login account provided for this task must be a member of the sysadmin role. This ensures the necessary permissions are in place for managing and administering the SQL Server instance.References:Nutanix Database Automation documentation, under SQL Server database registration and permission requirements.

質問 # 55
An administrator needs to create a custom PostgreSQL HA software profile.
Which software component manages the state of the cluster and handles failover?

• A. Patroni
• B. HAProxy
• C. etcd
• D. keepa lived

正解：A

解説：
NDB supports PostgreSQL HA software profiles for provisioning PostgreSQL databases with high availability. PostgreSQL HA software profiles consist of three components: etcd, HAProxy, and Patroni.
etcd is a distributed key-value store that provides a reliable way to store configuration data across a cluster of machines. etcd is used by Patroni to store and synchronize the cluster state and configuration.
HAProxy is a load balancer that distributes incoming requests to the PostgreSQL nodes. HAProxy is used to expose a single endpoint for database connections even as the roles of the individual nodes change.
Patroni is a template for PostgreSQL high availability. Patroni is responsible for managing the state of the cluster and handling failover. Patroni uses etcd as the distributed configuration store and relies on HAProxy for load balancing.
Therefore, the software component that manages the state of the cluster and handles failover is Patroni.
References:
* Nutanix Database Automation (NCP-DB) Course Details, Section 2.4: Provisioning PostgreSQL Databases
* Nutanix Database Automation (NCP-DB) Certification Details, Objective 2.4: Provision PostgreSQL Databases
* Nutanix Database Automation (NCP-DB) YouTube Playlist, Video 2.4: Provisioning PostgreSQL Databases
* [Nutanix Database Automation (NCP-DB) User Guide], Section 2.4: Provision PostgreSQL Databases
* [PostgreSQL High Availability: Under the Hood - Nutanix.dev]

質問 # 56
An administrator is tasked with providing a Jr DBA with access to NBD with limited capabilities.
This user should only be able to:
* Provision Databases
* Provision Database Servers
* Create Ones
* Refresh Clones
* Patch Database Servers
How can the administrator complete this task?

• A. Clone the Database Admin role, and remove all but the desired privileges.
• B. Create a user for the Jr DBA, and assign only those privileges.
• C. Clone the Database Admin role, and add the desired privileges.
• D. Create a role with only those privileges, assign the role to the Jr DBA user.

正解：D

解説：
The correct answer is B because it allows the administrator to create a custom role with the specific privileges that the Jr DBA user needs, and then assign that role to the user. This way, the administrator can control the access level of the Jr DBA user without affecting the existing roles or users in NDB. Option A is incorrect because it involves cloning the Database Admin role, which has more privileges than the Jr DBA user requires, and then adding more privileges, which is unnecessary and redundant. Option C is incorrect because it involves creating a user for the Jr DBA, but not assigning a role to the user, which means the user will not have any privileges in NDB. Option D is incorrect because it involves cloning the Database Admin role, which has more privileges than the Jr DBA user requires, and then removing some of the privileges, which is inefficient and risky.
References: The following sources provide more information about the user roles and privileges in NDB:
* Nutanix Database Management & Automation (NDMA) course, Module 8: Administering an NDB Environment, Lesson 8.6: Managing Access Controls in NDB
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Knowledge Objectives, Section
6 - Administer an NDB Environment
* Nutanix Database Service (NDB) User Guide, Chapter 8: Administering an NDB Environment, Section
8.6: Managing Access Controls in NDB

質問 # 57
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