What is vBucket in couchbase?
In some situations when the data have to be divided in a logical manner. vBucket is adopted for this purpose of sharing the data. All the buckets which are there in the Couchbase automatically get divided if this option of the bucket is enabled by the user. One of the best features about the bucket approach is that the users can make sure of effective allotment of the data throughout a cluster.
This is one of the most asked Couchbase interview questions.