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Redis Cluster Architecture Mastery Hub: The Practice Test 20

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Q1Domain Verified
s about "The Complete Redis Cluster Deployment Course 2026: From Zero to Expert!" for "Redis Cluster Architecture Mastery Hub: The": Question: In the context of Redis Cluster, what is the primary mechanism that allows a client to discover the current master of a specific key, even if the key has been re-sharded or migrated?
The client maintaining a local, always up-to-date, complete map of all hash slots and their corresponding masters.
Utilizing the `CLUSTER NODES` command to fetch the entire cluster topology and deriving the master for the key's hash slot.
The client sending a `GET` command to any node, and if that node is not the master, it will respond with a `MOVED` or `ASK` redirection.
Periodic polling of all cluster nodes for key-to-slot mappings.
Q2Domain Verified
When a Redis Cluster node experiences a failure and is marked as `FAIL` by its peers, what is the subsequent process by which a replica of the failed master can be promoted to become a new master?
The cluster manager (e.g., `redis-cli --cluster`) manually intervenes to promote a replica.
A designated "coordinator" node within the cluster initiates a vote among available replicas to elect a new master.
The cluster automatically selects the replica with the most recent replication backlog and promotes it.
If a master node is unreachable for a configured `cluster-node-timeout`, its replicas will detect this and initiate a failover process, electing a new master among themselves.
Q3Domain Verified
implies. Question: Consider a scenario where a Redis Cluster is experiencing significant network partitions. Which of the following statements best describes the behavior and potential consequences of such a partition on cluster operations?
Nodes within a partition will attempt to maintain their independent state, potentially leading to split-brain scenarios where data diverges if writes occur to both sides of the partition.
All nodes will enter a read-only mode to prevent data inconsistencies until the network partition is resolved.
The cluster will automatically reconfigure itself by electing a new set of masters from the largest reachable partition.
The cluster will continue to operate normally as long as at least one node remains reachable by the client.

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