In a three-node ZooKeeper ensemble, the typical myid values assigned to each member are 1, 2, and 3.

• A. True
• B. False
• C. Not applicable
• D. It must be 0,1,2

Answer: (A)

Each ZooKeeper server in an ensemble has a unique numeric identifier stored in a myid file within its data directory, and that ID must correspond to the server.X entry it uses in the configuration. For a three-node cluster, the typical setup assigns the IDs 1, 2, and 3 to the three members, so you have server.1, server.2, and server.3 in the config and matching myid values on disk. This simple, sequential convention makes it easy to map each host to its place in the quorum and supports correct leader election. While any set of distinct positive integers can technically be used, using 1, 2, and 3 is the standard and most readable approach for a 3-node cluster.