MongoDB Questions and Answers – Cluster Deployment

This set of MongoDB Multiple Choice Questions & Answers (MCQs) focuses on “Cluster Deployment”.

1. The ________ collection stores a document for each change to the metadata of a sharded collection.
a) version
b) changelog
c) settings
d) all of the mentioned
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2. Point out the correct statement.
a) The local database supports sharded cluster operation
b) The config database is a dependable API, and users should not write data to the config database in the course of normal operation or maintenance
c) Modification of the config database on a functioning system may lead to instability or inconsistent data sets
d) All of the mentioned
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3. The _________ collection stores a document for each sharded collection in the cluster.
a) help
b) shards
c) collections
d) all of the mentioned
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4. You can return a list of the collections, with the following helper ______________
a) show collects
b) show collection
c) show collections
d) all of the mentioned
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5. Point out the wrong statement.
a) Database servers store the metadata for a sharded cluster
b) Always back up the config database before doing any maintenance on the config server
c) The mongos instances cache metadata and use it to route read and write operations to shards
d) None of the mentioned
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6. ________ is a string that holds the address of the client, a mongos instance that initiates this change.
a) config.changelog.serverAddr
b) config.changelog.clientAddr
c) config.changelog.time
d) all of the mentioned
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7. The _______ collection keeps track of the active components in the sharded cluster.
a) deploys
b) lockpings
c) locks
d) all of the mentioned
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8. If the collection is empty then MongoDB will create the index as part of the ________
a) shardCollectionkey()
b) shardCollection()
c) keyCollection()
d) all of the mentioned
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9. Changing the _______ option will change the port that mongod listens for incoming connections on.
a) –shardsrvkey
b) –shardsrv
c) –shard
d) All of the mentioned
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10. The _____________ collection holds documents for each tagged shard key range in the cluster.
a) tags
b) databases
c) version
d) none of the mentioned
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