This set of MongoDB Multiple Choice Questions & Answers (MCQs) focuses on “Sharding Introduction”.
1. MongoDB uses _________ to support deployments with very large data sets and high throughput operations.
a) sharding
b) replication
c) replica sets
d) all of the mentioned
View Answer
Explanation: Sharding is a method for storing data across multiple machines.
2. Point out the correct statement.
a) High query rates can exhaust the CPU capacity of the server
b) Database systems with small data sets and high throughput applications can challenge the capacity of a single server
c) Smaller data sets exceed the storage capacity of a single machine
d) All of the mentioned
View Answer
Explanation: Working set sizes larger than the system’s RAM stress the I/O capacity of disk drives.
3. How many types of sharding exist in MongoDB?
a) 1
b) 2
c) 3
d) All of the mentioned
View Answer
Explanation: MongoDB have two basic approaches: vertical scaling and sharding.
4. _______ scaling adds more CPU and storage resources to increase capacity.
a) Horizontal
b) Vertical
c) Partition
d) All of the mentioned
View Answer
Explanation: When the primary steps down, the mongod closes all client connections.
5. Point out the wrong statement.
a) Scaling by adding capacity do not have limitations.
b) cloud-based providers may only allow users to provision smaller instances
c) There is a practical maximum capability for vertical scaling
d) All of the mentioned
View Answer
Explanation: High performance systems with large numbers of CPUs and large amount of RAM are disproportionately more expensive than smaller systems
6. _______ divides the data set and distributes the data over multiple servers, or shards.
a) Vertical
b) Sharding
c) Partition
d) All of the mentioned
View Answer
Explanation: Each shard is an independent database, and collectively, the shards make up a single logical database.
7. MongoDB supports sharding through the configuration of a sharded ______
a) shapes
b) clusters
c) sets
d) all of the mentioned
View Answer
Explanation: Sharding reduces the number of operations each shard handles.
8. How many components are present in sharded cluster?
a) 1
b) 2
c) 3
d) 4
View Answer
Explanation: Sharded cluster has the following components: shards, query routers and config servers.
9. To provide high availability and data consistency, in a production sharded cluster, each shard is a ___________
a) replica set
b) cluster
c) partition
d) all of the mentioned
View Answer
Explanation: Each shard stores less data as the cluster grows.
10. _________ interface with client applications and direct operations to the appropriate shard or shards.
a) Query Parsers
b) Query Routers
c) Query Executors
d) None of the mentioned
View Answer
Explanation: The query router processes and targets operations to shards and then returns results to the clients.
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