Which of the following node is used during election in a replication cluster?

Question

Options

• Aprimary
• Barbiter
• Chidden
• Dsecondary

• A
  3% (1)
• B
  88% (29)
• C
  3% (1)
• D
  6% (2)

Explanation

An arbiter is a specialized node whose sole purpose is to participate in replica set elections by casting a vote - it holds no data and cannot become a primary, making it the node specifically "used during election" to break tie votes when an even number of data-bearing nodes exist.

• Primary (A) is wrong because the primary is the outcome of an election, not a participant in choosing a new one - when a primary fails, the remaining nodes elect a replacement.
• Hidden (C) is wrong because hidden nodes have a priority of 0 and cannot vote in elections or become primary; they exist for tasks like backups or analytics.
• Secondary (D) is wrong not because secondaries don't vote (they do), but because their defining role is data replication - the node defined by its election role alone is the arbiter.

Memory tip: Think of "arbiter" → "arbitrate" (to settle a dispute). An arbiter arbitrates who wins the election, just like a human arbitrator settles disagreements - without becoming a party to the outcome itself.

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