NetApp Certified Data Administrator, ONTAP (NS0-165) Free Sample Questions
Description
Covers physical and software-defined storage platforms, ONTAP system management and SVM administration, logical storage features, network components, SAN and NAS connectivity, and performance.
12 free sample questions150 in the full practice test Other versions: NS0-161(60),NS0-164(276)
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?
Answer and explanation
Correct answer: C
NetApp All-SAN Array (ASA) platforms present symmetric active-active multipathing to host initiators across both controller nodes in an HA pair. This means all paths via both nodes are active/optimized, eliminating failover path state transitions and avoiding inter-controller traffic traversal over the cluster interconnect during normal I/O. In contrast, standard AFF systems employ asymmetric logical unit access (ALUA) where paths to the node owning the volume are active/optimized, while paths to the HA partner are active/non-optimized.
Q2Question 2
Beginner
Storage Platforms · Software-defined on-premises or cloud storage systems
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?
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
Answer and explanation
Correct answer: C
In multi-AZ deployments of Cloud Volumes ONTAP, the Mediator instance resides in a third Availability Zone. It provides quorum tiebreaking to prevent split-brain conditions and orchestrates the re-pointing of AWS route tables for floating IP addresses when storage failover occurs between CVO Node 1 and Node 2. NVRAM replication occurs directly between the two ONTAP instances, not through the Mediator.
Q3Question 3
Advanced
Storage Platforms · Upgrading or scaling ONTAP clusters
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?
Answer and explanation
Correct answer: D
During an ONTAP nondisruptive upgrade (ANDU), controllers are taken over, upgraded, and rebooted one by one. In ONTAP, SAN LIFs (iSCSI, FCP, NVMe) do not migrate or fail over to partner ports; instead, they go offline with the rebooting node. Multipath software on client hosts (such as MPIO or DM-Multipath) relies on surviving paths hosted on the partner controller node to maintain continuous data access. If host multipath is misconfigured or missing paths to the partner node, host I/O will fail during takeover.
Q4Question 4
Intermediate
Storage Platforms · Physical storage systems
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?
Answer and explanation
Correct answer: C
When transitioning a two-node switchless cluster to a switched cluster to support scaling beyond two nodes, the cluster network configuration must be updated. The administrator must set the switchless-cluster option to 'false' (using 'network options switchless-cluster modify -enabled false') and configure the cluster switches in ONTAP so the cluster management software properly detects the switched topology and enables switch health monitoring.
Q5Question 5
Beginner
Storage Platforms · Software-defined on-premises or cloud storage systems
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.
Answer and explanation
Correct answer: B
Amazon FSx for NetApp ONTAP provides full ONTAP feature parity, allowing storage administrators to manage the file systems using native ONTAP tools including the ONTAP CLI (via SSH to the administrative endpoint), ONTAP REST APIs, NetApp Cloud Manager / BlueXP, and System Manager.
Q6Question 6
Intermediate
Core ONTAP · High availability concepts
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?
Answer and explanation
Correct answer: A
In an even-node cluster (4 nodes), one node is assigned epsilon to serve as a tiebreaker, giving it an additional vote weighting (effectively 5 total voting units across the cluster). To maintain quorum, more than 50% of the votes are required. The surviving three nodes hold 3 votes out of 5 (>50%), meaning quorum is maintained, management ring applications remain healthy, and Node-02 can execute storage failover takeover of Node-01.
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