C100DBA Server Administration Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  db.serverStatus()

  Why it's wrong here

  The 'db.serverStatus()' command returns a document providing an overview of the server's state, including memory usage, connection counts, and database operations. While useful for performance monitoring, it does not provide specific replica set configuration details or the health status of other nodes in the cluster.

• ✗

  rs.conf()

  Why it's wrong here

  The 'rs.conf()' command returns the current configuration document for the replica set, showing member definitions, voting status, and priority levels. However, it does not show the real-time operational status, such as whether a member is currently in a 'secondary' or 'recovering' state, unlike the 'rs.status()' command.

• ✓

  rs.status()

  Why this is correct

  The 'rs.status()' command returns a document that reports the status of the replica set, including the role of the current node, the status of other members, and critical information such as lag. This is the standard command for monitoring the health and state of a MongoDB cluster.

• ✗

  db.isMaster()

  Why it's wrong here

  The 'db.isMaster()' command reports whether the current node is the primary and provides basic information about the replica set. While it is helpful for client-side routing, it lacks the detailed diagnostic and member-specific health information provided by 'rs.status()', making it insufficient for full replica set administration.