Technologies Experiences Contribute

Technologies Experiences Contribute

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Replication

1. Discuss replication in MongoDB?

Level: Expert | Frequency: High

2. What is Replica Set?

Level: Expert | Frequency: High

3. What are replica set members?

Level: Expert | Frequency: High

4. Explain how the Raft consensus algorithm works within MongoDB Replication.

Level: Expert | Frequency: High

5. What is a 'Rollback' in the context of a replica set, and how do you minimize its occurrence?

Level: Expert | Frequency: High

6. Deep dive into Write Concern. What happens under the hood when you use { w: 'majority', j: true }?

Level: Expert | Frequency: High

7. How does 'Read Preference' differ from 'Read Concern'?

Level: Expert | Frequency: High

8. What is 'Replication Lag' and what are the top three reasons it occurs in a Node.js-backed system?

Level: Expert | Frequency: High

9. Explain the 'Oplog' (Operations Log) architecture. What happens if the Oplog is too small?

Level: Expert | Frequency: High

10. You are running a 3-node replica set across two data centers (2 nodes in DC-A, 1 node in DC-B). If the network link between the DCs breaks, what happens to your application's ability to write?

Level: Expert | Frequency: High

11. When would you use a 'Delayed Member' or a 'Hidden Member'?

Level: Expert | Frequency: High

All Topics

BasicsCRUDBulk OperationsIndexingData ModellingReplicationShardingTransactionsAggregation