Question

Syntax for specifying an initial batch size for the cursor is ________________

(a) cursor: { batchSize: <string> }

(b) cursor: { batchSize: <int> }

(c) cur: { batchSize: <int> }

(d) none of the mentioned

I had been asked this question in a job interview.

My question is based upon Aggregation Pipeline topic in section Aggregation Concepts and Aggregation Mechanics of MongoDB

Answer 1

Correct answer is (b) cursor: { batchSize: <int> }

The best explanation: A batchSize of 0 means an empty first batch and is useful for quickly returning a cursor or failure message without doing significant server-side work.