In a replicated cluster, which of the following node would only be used during an election?

Question

Options

• Aarbiter
• Bprimary
• Chidden
• Dsecondary

• A
  91% (29)
• B
  3% (1)
• C
  6% (2)

Explanation

An arbiter (A) exists solely to participate in elections by casting a vote to break ties - it holds no data and cannot become a primary, making it useless for any purpose other than elections. A primary (B) is wrong because it actively handles all write operations and is the result of an election, not a node reserved only for one. A secondary (D) replicates data from the primary and can serve reads, so it has ongoing operational duties beyond elections. A hidden node (C) also replicates data and can vote in elections, but its main purpose is for reporting or backups, not elections exclusively.

Memory tip: Think of the arbiter as a referee - it shows up only when there's a dispute (election) and has no role in the actual game (data operations).

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