What is data modeling in MongoDB world?

• A.A way to organize fields in a document to support your application performance and querying capabilities.
• B.A way to build your application based on how your data is stored.
• C.A way to show your database with graphs.
• D.A way to decide whether to store your data in the cloud or locally.

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You have the following replica set configuration: conf = { "_id": "replset", "version": 1, "protocolVersion": 1, "members": [ { "_id": 0, "host": "192.168.120.24:27017", "priority": 2, "votes": 1 }, { "_id": 1, "host": "192.168.120.24:27018", "priority": 1, "votes": 1 }, { "_id": 1, "host": "192.168.120.24:27019", "priority": 1, "votes": 1 } ] } Select all true statements about this configuration.

• A.This configuration is incorrect. Host information must be unique for each member in a replica set.
• B.This configuration is correct.
• C.This configuration is incorrect. _id field must be unique for each member in a replica set.
• D.This configuration is incorrect. You can only specify a priority of 0 or 1.

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Suppose you want to join two collections in the same database. What aggregation stage do you need to use?

• A.$out
• B.$lookup
• C.$project

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You have the following configuration file: storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled You have to update this file such that: * mongod sends logs to /var/mongodb/logs/mongod.log * mongod is forked and run as a daemon Select correct Answer.

• A.storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled systemLog: destination: file path: "/var/mongodb/logs/mongod.log"
• B.storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled systemLog: destination: file path: "/var/mongodb/logs/mongod.log" processManagement: fork: true
• C.storage: dbPath: /var/mongodb/db net: bindIp: localhost port: 27000 security: authorization: enabled processManagement: fork: true

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Which cursor method should you use to specify the maximum number of documents returned?

• A.cursor.map()
• B.cursor.limit()
• C.cursor.skip()
• D.cursor.hint()
• E.cursor.count()

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