NS0-165 sample questions

Question 1

A storage architect is designing an enterprise SAN infrastructure for high-throughput, low-latency database workloads. The customer is evaluating NetApp All-SAN Array (ASA) platforms versus standard AFF A-Series systems. Which architectural behavior uniquely characterizes NetApp ASA platforms compared to standard AFF systems?

Accepted Answer

ASA platforms provide symmetric active-active multi-pathing where all target FC and iSCSI paths across both controllers in the HA pair are continuously optimized.

Answer

ASA platforms eliminate the cluster interconnect hardware links because write operations are exclusively acknowledged by a single controller NVRAM module.

Answer

ASA platforms rely exclusively on standard ALUA where paths through the partner controller remain in an active/non-optimized standby state.

Answer

ASA platforms disallow NVMe/FC and NVMe/TCP protocols, supporting only legacy FCP and iSCSI protocols.

Question 2

An organization is deploying Cloud Volumes ONTAP (CVO) in Amazon Web Services (AWS) using a high-availability (HA) multi-Availability Zone (AZ) configuration. Which role does the Cloud Volumes ONTAP Mediator perform in this architecture? ```mermaid graph TD AZ1[AWS AZ 1: CVO Node 1] AZ2[AWS AZ 2: CVO Node 2] AZ3[AWS AZ 3: CVO Mediator] AZ1 -.-> AZ3 AZ2 -.-> AZ3 ```

Accepted Answer

It acts as a quorum tiebreaker and manages AWS route table updates for client floating IP addresses during automatic failover.

Answer

It hosts the secondary tier for FabricPool object storage data before blocks are moved to Amazon S3 Glacier.

Answer

It serves as an NVRAM replication cache between Node 1 and Node 2 to guarantee synchronous block writes across AZs.

Answer

It proxies NFS and SMB client traffic across availability zones to distribute network workloads evenly.

Question 3

A lead storage administrator is preparing an automated nondisruptive upgrade (ANDU) on a production 4-node FAS8700 cluster running ONTAP 9.16.1. The cluster serves mission-critical iSCSI SAN and NFSv4.1 file shares. Before initiating the upgrade to ONTAP 9.18.1, the administrator executes validation checks and reviews cluster requirements.

During the pre-upgrade assessment, the administrator observes the following conditions:

Node 3 and Node 4 are an HA pair experiencing continuous background aggregate deduplication metadata rebuilding.
All data LIFs have failover-policy configured as 'system-defined' and auto-revert set to 'true'.
SAN iSCSI LIFs are pinned to their home ports.
Storage failover target status is reported as normal and SFO interconnect is operational.

What requirement must be met before executing the automated nondisruptive upgrade command to ensure uninterrupted host operations?

Accepted Answer

Ensure all SAN multipathing software on connected hosts is configured with active paths to both nodes of each HA pair, because SAN data LIFs do not fail over to partner nodes during controller reboot.

Answer

Abort all background efficiency processes and delete all existing Snapshot copies created within the last 24 hours across all aggregates.

Answer

Change the cluster quorum model by manually unassigning epsilon from the master node prior to triggering cluster image package installation.

Answer

Manually modify all iSCSI LIFs to have a failover-policy of 'sfo-partner-only' so that block paths migrate across the cluster interconnect during reboot.

Question 4

A systems engineer is converting an existing two-node switchless AFF A250 cluster into a four-node switched cluster by adding two AFF A400 nodes. Which configuration change must be performed on the cluster ports of the existing nodes before connecting them to the new cluster network switches?

Accepted Answer

Reconfigure the cluster interconnect option using the 'system cluster-switch create' command and set the switchless-cluster parameter to false.

Answer

Disable the Storage Failover (SFO) interconnect and unmap all partner NVRAM reflection memory channels.

Answer

Reassign cluster LIFs to the node management broadcast domain before recabling the physical links.

Answer

Bind all cluster ports into an LACP interface group (ifgrp) configured with an MTU of 1500 bytes.

Question 5

True or False: Amazon FSx for NetApp ONTAP supports direct administrative access through the native ONTAP command-line interface (CLI) and ONTAP REST APIs for managing SVMs, volumes, and data protection features.

Accepted Answer

True

Answer

False

Question 6

In an ONTAP cluster with four nodes (Node-01, Node-02, Node-03, Node-04), an administrator is analyzing quorum mechanics and cluster ring databases. What occurs if Node-01, which currently holds epsilon, suffers an unexpected hardware failure while all other nodes and network links remain healthy?

Accepted Answer

The surviving three nodes maintain quorum because they represent a majority of total voting weight (3 out of 5 total votes, where epsilon contributed an extra fractional vote), allowing cluster operations to proceed without interruption.

Answer

The cluster immediately loses quorum and all client data access is halted until an administrator manually reassigns epsilon to Node-02 via serial console.

Answer

Epsilon is dynamically transferred to the cluster management switch to act as an external quorum broker.

Answer

Node-02, Node-03, and Node-04 automatically reboot simultaneously into maintenance mode to prevent split-brain aggregate corruption.

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