11.) What is the purpose of the balancer in MongoDB sharding?
A) To encrypt data
B) To distribute chunks evenly across shards
C) To route queries to shards
D) To back up data
12.) Which of the following is true about hashed sharding?
A) It uses a range-based shard key
B) It is slower than range-based sharding
C) It uses a hash function to distribute data
D) It is not supported in MongoDB
13.) What is the primary disadvantage of range-based sharding?
A) It is slower than hashed sharding
B) It can lead to uneven data distribution
C) It requires more config servers
D) It is not supported in MongoDB
14.) Which command is used to add a shard to a sharded cluster?
A) sh.addShard()
B) sh.createShard()
C) sh.enableShard()
D) sh.startShard()
15.) What is the role of the mongos process in MongoDB sharding?
A) To store metadata
B) To store actual data
C) To route queries to the correct shard
D) To act as a config server
16.) What happens if a shard goes down in a sharded cluster?
A) The entire cluster becomes unavailable
B) Only the data on the failed shard is unavailable
C) The balancer redistributes the data
D) The config server takes over
17.) Which of the following is true about tag-aware sharding?
A) It uses tags to back up data
B) It uses tags to encrypt data
C) It uses tags to compress data
D) It uses tags to group shards
18.) What is the purpose of the sh.splitAt() command?
A) To enable sharding
B) To merge two chunks
C) To add a new shard
D) To split a chunk at a specific shard key value
19.) Which of the following is true about zone sharding?
A) It allows data to be distributed based on geographic zones
B) It is slower than hashed sharding
C) It requires more config servers
D) It is not supported in MongoDB
20.) Which of the following is true about the sh.enableBalancing() command?
A) It stops the balancer
B) It enables the balancer to redistribute chunks
C) It adds a new shard
D) It removes a shard
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