Free NS0-165 sample questions

Correct 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.

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.

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

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.

Correct 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.

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.

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

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.

Correct answer: True

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.

Correct 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.

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.