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Which NDB feature lets administrators schedule periodic compliance scans on managed databases for items such as patch level and parameter drift?

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B
C
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2026 Statistics

Key Facts: NCM-DB Exam

100

Practice Questions

OpenExamPrep NCM-DB bank

6

Engines Covered

Oracle, SQL Server, PostgreSQL, MySQL, MariaDB, MongoDB

Master

Certification Tier

Nutanix University

25 ms

Max Latency Between HA Clusters

Nutanix NDB documentation

9

Blueprint Domains

OpenExamPrep NCM-DB study plan

LCM

NDB Upgrade Path

Nutanix Life Cycle Manager

NCM-DB is positioned as a Master-tier exam covering advanced NDB architecture (HA control plane, agents, repository, Era Service Auth), engine-specific provisioning, Time Machine and PITR, cloning/refresh strategy, rolling patching, HA/DR with Oracle Data Guard, SQL Server AlwaysOn AG, Patroni, MySQL InnoDB Cluster, and MongoDB replica sets, plus full automation via REST API, era-cli, Terraform, and Self-Service blueprints.

Sample NCM-DB Practice Questions

Try these sample questions to test your NCM-DB exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In a fully resilient Nutanix Database Service (NDB) HA deployment, which component is responsible for routing client and API traffic across multiple API server nodes?
A.Prism Central VIP
B.HAProxy with a floating virtual IP
C.NDB Agent service
D.Patroni leader election
Explanation: NDB HA introduces an HAProxy load-balancer tier with a floating VIP that fronts the API servers. Clients and the UI connect to the VIP, which HAProxy routes to a healthy API server, providing transparent failover during upgrades or single-VM failures.
2A customer is designing an NDB HA deployment that spans three Nutanix clusters in different rooms of the same data center. What is the maximum supported network latency between the selected clusters?
A.5 ms round-trip
B.10 ms round-trip
C.25 ms round-trip
D.50 ms round-trip
Explanation: Nutanix supports an NDB HA deployment across clusters only when the round-trip network latency between selected clusters is 25 ms or less. Higher latency degrades repository replication and HAProxy health checks and is therefore unsupported.
3Which database technology backs the NDB control-plane repository in an HA deployment?
A.MariaDB Galera Cluster
B.PostgreSQL with Patroni
C.Microsoft SQL Server AlwaysOn AG
D.Oracle Data Guard
Explanation: The NDB repository, which stores metadata about databases, time machines, snapshots, profiles, and operations, runs on PostgreSQL. In HA mode the repository uses Patroni to manage leader election and streaming replication across three replicas.
4Which NDB component is responsible for scheduling and executing database operations such as snapshots and log catch-ups on remote registered Nutanix clusters?
A.NDB API Server
B.NDB Agent VM
C.HAProxy
D.Repository service
Explanation: Each remote Nutanix cluster registered with NDB receives an NDB Agent VM. The Agent runs operations locally on that cluster, including snapshot creation, log catch-ups, clone operations, and database VM provisioning. This keeps data-plane operations close to the workload.
5A senior architect is sizing an NDB HA control plane for 1,000 managed databases. Which statement most accurately describes the relationship between the NDB Server and the API server tier?
A.After enabling HA, the original NDB Server becomes the first API server in the scale-out
B.After enabling HA, the original NDB Server is decommissioned and replaced by three new VMs
C.API servers run on the same VMs as the database engines
D.HA replaces the API tier with a single active-passive pair
Explanation: When HA is enabled, NDB scales out by promoting the original NDB Server to be the first stateless API server and then deploying additional API server VMs, repository replicas, and HAProxy nodes. The original VM is reused, not destroyed.
6Which set of database engines is supported for full lifecycle management by Nutanix Database Service?
A.Oracle, Microsoft SQL Server, PostgreSQL, MySQL, MariaDB, MongoDB
B.Oracle, DB2, Sybase, Informix, Teradata
C.Only Oracle and PostgreSQL
D.Only Microsoft SQL Server and MySQL
Explanation: NDB provides provisioning, cloning, patching, and Time Machine protection for Oracle, Microsoft SQL Server, PostgreSQL, MySQL, MariaDB, and MongoDB. Newer NDB releases also extended PostgreSQL coverage with pgvector and EDB.
7Which statement best describes how the NDB Agent communicates with the control plane in a multi-cluster deployment?
A.Agents poll the API server using outbound HTTPS, eliminating the need for inbound rules toward the agent
B.Agents listen on TCP 22 for inbound SSH from the control plane only
C.Agents require NFS mounts from the repository to receive work
D.Agents use multicast discovery on the cluster CVM network
Explanation: NDB Agents establish outbound HTTPS connections to the API server and pull operations from a work queue. This allows the control plane to manage remote clusters without requiring inbound network access to the agent VMs.
8In a single-cluster NDB deployment without HA, which statement is true about the control plane?
A.All NDB control-plane services run on the single NDB Server VM
B.The NDB Server runs only the UI; all other services run on the agent
C.The repository must run on Prism Central
D.Patroni and HAProxy are mandatory even without HA
Explanation: In the simplest topology, a single NDB Server VM hosts all control-plane services: frontend/UI, API gateway, repository, and the agent for the local cluster. HAProxy and Patroni are introduced only when HA is enabled.
9A platform team needs to register a second Nutanix cluster with an existing NDB instance for cross-cluster cloning. What is the correct first step?
A.Register the cluster with NDB using Prism Element credentials and a management network
B.Re-deploy NDB onto the new cluster
C.Create a Protection Domain that mirrors the NDB Server
D.Disable HA on the existing NDB before registration
Explanation: To enable multi-cluster operations, the new Nutanix cluster is registered with the existing NDB instance using Prism Element credentials and a management network. NDB then deploys an Agent VM on the new cluster to drive local operations.
10Which statement most accurately describes how NDB stores Time Machine snapshots of managed databases?
A.NDB leverages native AOS storage snapshots and a transaction-log catalog rather than copying full backups for each snapshot
B.Each snapshot is a full row-by-row export written to the NDB repository
C.Snapshots are written to Prism Central as flat files
D.Snapshots are streamed to the database engine's native dump utility on each schedule
Explanation: Time Machine uses AOS-native space-efficient storage snapshots for the database VM disks and combines them with a continuous transaction-log catalog. This is what makes per-database recovery cheap, fast, and granular.

About the NCM-DB Exam

The NCM-DB is the Master-tier credential for database automation on Nutanix Cloud Platform. It validates expert-level skill in designing, automating, and operating Nutanix Database Service (NDB, formerly Era) at scale across Oracle, Microsoft SQL Server, PostgreSQL, MySQL/MariaDB, and MongoDB.

Questions

100 scored questions

Time Limit

Refer to Nutanix exam guide

Passing Score

Set by Nutanix standard-setting

Exam Fee

Refer to Nutanix University (Nutanix University)

NCM-DB Exam Content Outline

17 items

NDB Architecture

Control-plane HA with HAProxy and Patroni-managed PostgreSQL repository, NDB Agent placement on registered clusters, Era Service Auth, cross-cluster operations, and AOS replication choices.

13 items

Time Machine and Data Protection

SLAs with daily/weekly/monthly/quarterly windows, on-demand snapshots, transaction log catch-up, PITR granularity per engine, integration with Nutanix Objects, and partner backup tools.

11 items

Database Provisioning

Profile-driven provisioning across Oracle (Single Instance and supported RAC), SQL Server (standalone and AlwaysOn AG), PostgreSQL HA, MySQL InnoDB Cluster, MariaDB, and MongoDB replica sets, including Bring-Your-Own-Database registration.

11 items

Cloning and Refresh

Full, linked, and zero-byte (snapshot-based) clones; refresh of long-lived clones; pre/post scripts for masking; cross-cluster cloning prerequisites.

11 items

Monitoring, Troubleshooting, RBAC

Alert design, syslog/SIEM forwarding, era-server and era-agent log collection, multi-tenancy via projects, separation of duties, audit logs, encryption at rest with AOS Cluster Encryption and TDE.

10 items

NDB Deployment and Configuration

Compute, Software, Network, Database Parameter, and OS profiles, profile versioning, storage layout with Volume Groups, AD-join, and pre/post-provisioning scripts.

10 items

HA/DR for Database Engines

Oracle Data Guard switchover/failover, SQL Server AlwaysOn AG with WSFC, PostgreSQL streaming replication with Patroni, MySQL InnoDB Cluster, MongoDB replica-set elections, Metro/NearSync/Async.

9 items

Automation: API, CLI, IaC

Swagger/OpenAPI documentation, REST API operation IDs, era-cli, terraform-provider-nutanix, Ansible patterns, Self-Service (Calm) blueprints, secure service-account authentication.

8 items

Database Patching and Upgrades

Software Profile versioning, rolling patches across replicas, pre-checks and snapshot-based rollback, post-checks, and NDB control-plane upgrades via LCM.

How to Pass the NCM-DB Exam

What You Need to Know

  • Passing score: Set by Nutanix standard-setting
  • Exam length: 100 questions
  • Time limit: Refer to Nutanix exam guide
  • Exam fee: Refer to Nutanix University

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

NCM-DB Study Tips from Top Performers

1Diagram the NDB HA control plane end-to-end (HAProxy, API servers, Patroni-backed repository, agents) and label every traffic flow
2Practice profile design: Compute, Software, Network, Database Parameter, and OS - know which fields each carries
3Build a Time Machine mental model: SLA windows + on-demand snapshots + log catch-up + PITR granularity per engine
4Memorize engine-specific HA mechanisms: Oracle Data Guard, SQL Server AlwaysOn AG with WSFC, PostgreSQL streaming with Patroni, MySQL InnoDB Cluster, MongoDB replica-set elections
5Automate at least one end-to-end provision/clone/refresh flow with the REST API or terraform-provider-nutanix to internalize operation IDs

Frequently Asked Questions

What is the NCM-DB exam?

NCM-DB (Nutanix Certified Master - Database Automation) is positioned as the Master-tier credential for database automation on Nutanix Cloud Platform. It validates expert-level NDB skill across architecture, Time Machine, cloning, patching, HA/DR, and API automation.

What prerequisites are recommended for NCM-DB?

Candidates should hold NCP-DB at minimum and ideally NCP-MCI, with multi-year hands-on NDB experience. Working knowledge of Oracle, SQL Server, PostgreSQL, MySQL/MariaDB, and MongoDB is expected at the Master tier.

Which NDB topics are most heavily tested?

Architecture (HA control plane, agents, repository), Time Machine (SLAs, log catch-up, PITR), provisioning across all supported engines, clone/refresh strategy, rolling patching, engine-specific HA/DR, and end-to-end automation via REST API, era-cli, and Terraform.

How does NDB Time Machine deliver point-in-time recovery?

Time Machine combines AOS-native space-efficient snapshots with continuous transaction-log capture (Oracle archived redo, PostgreSQL WAL, SQL Server log backups, etc.). NDB restores the closest snapshot before the target time and rolls logs forward to deliver second-level PITR for engines that support it.

What database engines does NDB manage?

NDB provides full lifecycle management for Oracle, Microsoft SQL Server, PostgreSQL (including pgvector and EDB), MySQL, MariaDB, and MongoDB. Master-tier candidates should know engine-specific HA/DR options for each.

How is NDB itself upgraded?

Nutanix Life Cycle Manager (LCM) handles NDB control-plane upgrades. Managed databases keep running during most steps; only the control plane restarts briefly. Long-running operations should be paused around the upgrade window.