Zookeeper easy
What is the standard TCP port used by clients to establish a session with a ZooKeeper ensemble?
- A 8080 (HTTP Standard)
- B 2181
- C 9092 (Kafka Standard)
- D 3306 (MySQL Standard)
Answer: B. 2181
Port 2181 is the default port clients use to connect to the ZooKeeper ensemble.
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- What is the primary technical function of a ZooKeeper 'Watch'?
- A system administrator increases `jute.maxbuffer` to 5MB on every ZooKeeper server to store large configuration objects. However, write operations larger than 1MB still fail. What is the most likely cause?
- By default, `forceSync` is enabled. If you disable it, what trade-off are you making?
- If the specific ZooKeeper node a client is connected to crashes, what should the client do?
- Which cluster configuration has *worse* availability: A 3-node cluster or a 4-node cluster? (Assuming simple majority quorum)
- According to the CAP Theorem, how is ZooKeeper classified?