NS0-157 Question #292: Real Exam Question with Answer & Explanation

The correct answer is B: Simple majority. A Data ONTAP cluster maintains quorum when a simple majority - more than half - of its nodes are healthy and communicating, preventing split-brain scenarios.

Question

If a cluster is in quorum, what is the minimum number of participating nodes that must be healthy?

Options

ATwo thirds
BSimple majority
CThree quarters
DHalf

Explanation

A Data ONTAP cluster maintains quorum when a simple majority - more than half - of its nodes are healthy and communicating, preventing split-brain scenarios.

Common mistakes.

A. Two-thirds is a stricter threshold than the quorum requirement - clustered ONTAP only needs a simple majority, not two-thirds of nodes.
C. Three-quarters is an overly restrictive threshold; quorum is established with just a simple majority, not three-quarters of participating nodes.
D. Exactly half (50%) is insufficient for quorum because a tie condition cannot resolve which partition should continue operating - a simple majority means more than half.

Concept tested. Cluster quorum and node majority requirements

Reference. https://docs.netapp.com/us-en/ontap/concepts/cluster-quorum-node-majority-concept.html

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