Mongodb does provide high availability via which option?

The correct answer is A. Replication. MongoDB achieves high availability through Replication (A), specifically via Replica Sets - a group of MongoDB instances that maintain the same dataset, where a primary node handles writes and secondary nodes automatically take over (failover) if the primary goes down, ensuring c

Replication

Question

Options

AReplication
BIndexing
CSharding
DJournaling

How the community answered

(41 responses)

A
93% (38)
B
5% (2)
D
2% (1)

Explanation

MongoDB achieves high availability through Replication (A), specifically via Replica Sets - a group of MongoDB instances that maintain the same dataset, where a primary node handles writes and secondary nodes automatically take over (failover) if the primary goes down, ensuring continuous availability.

B (Indexing) improves query performance and lookup speed, not availability - the database can still go down even with perfect indexes.
C (Sharding) addresses scalability by distributing data across multiple servers to handle large datasets and high throughput, not redundancy or failover.
D (Journaling) provides durability by logging write operations so data can be recovered after a crash - it helps with data integrity, not uptime across node failures.

Memory tip: Think "Replication = Redundancy = Reliability" - having multiple copies of your data means one node can fail without taking the service down.

Topics

#high availability#replication#replica set

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