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Nutanix NCP-DB 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Describe NDB Concepts: It defines database and NDB terminology. The topic also explains benefits and features of NDB.
トピック 2	Monitor Alerts and Storage Usage Within an NDB Implementation: It is all about monitoring alerts and management of storage usage.
トピック 3	Administer an NDB Environment: While focusing on the administration of an NDB environment, this topic focuses on managing NDB profiles, applying procedural concepts, and managing networks in NDB. Lastly, the topic explains sub-topics of managing access controls in NDB and identifying how to use NDB APIs and CLI.
トピック 4	Deploy and Configure an NDB Solution: This topic discusses how to deploy, configure, and NDB Instance.

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NCP-DB PDF & NCP-DB模擬試験サンプル

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Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 認定 NCP-DB 試験問題 (Q151-Q156):

質問 # 151
A Log Catchup gap has occurred, impacting the ability to perform point-in-time restore (PITR) operations to create a clone or perform a database restore.
Which two statements below are true for the NDB Time Machine Heal Snapshot feature? (Choose two.)

A. Once a Time Machine Heal process has been invoked and successful, the Log Catchup gap can be spanned for a PITR operation.
B. By default the time machine auto-heal feature is enabled.
C. Manual Heal is only used when gaps in Log Catchup are detected once the operation has begun failing.
D. Time Machine auto-heal runs on the NDB server every 5 minutes and checks for different cases that require a heal.

正解：A、D

解説：
A Log Catchup gap in Nutanix Database Service (NDB) occurs when transaction logs are missing or corrupted, disrupting point-in-time restore (PITR) operations for cloning or database restoration via Time Machine. The NDB Time Machine Heal Snapshot feature addresses this by repairing snapshots to resolve such gaps.
* Option A (By default the time machine auto-heal feature is enabled) is incorrect because the auto- heal feature is not enabled by default; it requires explicit configuration or manual invocation.
* Option B (Manual Heal is only used when gaps in Log Catchup are detected once the operation has begun failing) is incorrect because manual heal can be initiated proactively or reactively, not solely after failure detection.
* Option C is correct because a successful Time Machine Heal process restores the snapshot integrity, allowing PITR to span the previously gapped period.
* Option D is correct as the auto-heal process, when enabled, runs every 5 minutes to detect and address healable conditions, aligning with NDB's automated maintenance schedule.
Together, C and D reflect the operational mechanics of the Heal Snapshot feature.
References
* Nutanix Database Service (NDB) User Guide, Chapter 5: Configuring Time Machines, Section:
Healing Snapshot Gaps
* Nutanix Support & Insights, Knowledge Base Article: "Resolving Log Catchup Gaps with Time Machine Heal"
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 5: Protect Databases Using Time Machine

質問 # 152
An administrator needs to provision PostgreSQL instance from a software profile. The software profile was created from a VM with services such as etcd, HAProxy, Patroni and keepalived installed.
What should the administrator perform to successfully provision an HA instance?

A. Provision an HA instance with the services enabled.
B. Enable the services, create a software profile version, and provision an HA instance.
C. Provision an HA instance with the services disabled.
D. Disable the services, create a software profile version, and provision an HA instance.

正解：C

解説：
To provision a PostgreSQL HA instance from a software profile created from a VM with services like etcd, HAProxy, Patroni, and keepalived installed, the administrator must ensure the instance aligns with NDB's HA framework. These services (e.g., Patroni for PostgreSQL HA management, HAProxy for load balancing) may conflict with NDB's built-in HA mechanisms. Provisioning an HA instance with these services disabled allows NDB to manage HA using its native replication and failover capabilities (e.g., streaming replication), avoiding duplication or interference from the VM's pre-installed services.
* Option A (Provision an HA instance with the services enabled) is incorrect because enabling these services may cause conflicts with NDB's HA management.
* Option B (Disable the services, create a software profile version, and provision an HA instance) is incorrect because disabling services and recreating a profile is unnecessary; the provisioning step can handle service configuration.
* Option C (Provision an HA instance with the services disabled) is correct as it ensures NDB's HA features take precedence without interference.
* Option D (Enable the services, create a software profile version, and provision an HA instance) is incorrect due to potential conflicts with NDB's HA implementation.
Note: The typo "PostqreSQL" is assumed to mean "PostgreSQL."
References
* Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Database Engines, Section:
Provisioning HA Instances
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 4: Manage Database Engines

質問 # 153
When provisioning Microsoft SQL Server utilizing database groups, which statement is true?

A. NDB supports one database group per database server VM or database server cluster
B. Databases within a database group must be all of the same size.
C. Microsoft recommends 35 databases within a single database group.
D. Databases within a database group can share multiple Time Machine configurations.

正解：D

解説：
In NDB, database groups are used to manage multiple Microsoft SQL Server databases collectively, enabling centralized administration and protection policies. The statement "Databases within a database group can share multiple Time Machine configurations" is true. A Time Machine in NDB manages snapshots and log backups for recovery, and a database group can be associated with multiple Time Machine configurations to support different retention policies or recovery point objectives (RPOs) for the databases within the group.
This flexibility allows tailored data protection strategies.
Other options are incorrect:
* A. Microsoft recommends 35 databases within a single database group: There is no specific Microsoft recommendation for this limit; NDB imposes its own constraints based on performance and resource usage.
* C. NDB supports one database group per database server VM or database server cluster: NDB allows multiple database groups per server or cluster, depending on configuration.
* D. Databases within a database group must be all of the same size: NDB does not enforce uniform database sizes within a group.
Thus, the verified answer is B, reflecting NDB's Time Machine flexibility.
Official Nutanix Database Automation References
* Nutanix Database Management & Automation (NDMA) course, Module 3: Managing Database Instances, Lesson 3.6: Managing Database Groups.
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Knowledge Objectives, Section
3: Manage NDB Solutions, Objective 3.5: Configure Database Groups (applicable to v6.10).
* Nutanix NDB Administration Guide: "Database Groups and Time Machine Configurations" section.

質問 # 154
An administrator has noticed that the automatic snapshot and log catch-up (automatic and manual) activities for a Time Machine are halted and manual snapshots cannot be created.
What status is this Time Machine in?

A. READY
B. OFFLINE
C. FROZEN
D. PAUSED

正解：D

解説：
In NDB, a Time Machine manages snapshots and log catch-up operations for database protection and recovery. The scenario describes a Time Machine where automatic snapshot and log catch-up activities (both automatic and manual) are halted, and manual snapshots cannot be created. This indicates the Time Machine is in a PAUSED state.
In NDB, the Time Machine states are:
* FROZEN: A temporary state during specific operations (e.g., cloning), but it doesn't halt all activities permanently.
* OFFLINE: Indicates the Time Machine is unavailable or not operational, often due to connectivity or configuration issues, but this typically prevents access rather than just halting operations.
* PAUSED: Explicitly stops all scheduled and manual snapshot/log activities, often manually triggered by an administrator or due to an error condition (e.g., resource constraints). Operations resume when unpaused.
* READY: The normal operational state where snapshots and log catch-ups occur as scheduled.
Given the inability to create manual snapshots alongside halted automatic operations, PAUSED is the most fitting status, as it reflects an intentional or enforced suspension of activities.
Official Nutanix Database Automation References
* Nutanix Database Management & Automation (NDMA) course, Module 5: Data Protection and Recovery, Lesson 5.2: Managing Time Machines.
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Knowledge Objectives, Section
5: Protect Databases Using NDB, Objective 5.2: Manage Time Machine States (applicable to v6.10).
* Nutanix NDB Administration Guide: "Time Machine Statuses and Operations" section.

質問 # 155
What must be completed within NDB before patching a Linux OS?

A. Configure the repository.
B. Update the database.
C. Configure database high availability.
D. Update the software profile version.

正解：A

解説：
Before patching a Linux OS on a database server VM provisioned using NDB, you must configure the repository for the OS updates. This can be done by creating a Repository Profile in NDB and specifying the URL, username, and password for the repository. The Repository Profile can be applied to one or more database server VMs during the provisioning process or later. By configuring the repository, you ensure that NDB can access and download the latest OS patches from a trusted source. References: Nutanix Database Automation (NCP-DB) Course Details, Nutanix Database Automation (NCP-DB) Certification Details, Nutanix Database Automation (NCP-DB) YouTube Playlist, Nutanix Database Automation User Guide.

質問 # 156
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