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Which of the following is NOT a MongoDB data type?

  • boolean
  • int32
  • varchar
  • string
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Which MongoDB method is used to convert a collection to a capped collection?

  • setCapped()
  • makeCapped()
  • capCollection()
  • convertToCapped()
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Which storage engine is the default in MongoDB?

  • MMAPv1
  • WiredTiger
  • InnoDB
  • RocksDB
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How do you check the version of MongoDB you are running?

  • mongo --version
  • db.version()
  • mongod --version
  • mongo -v
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Which of the following is used to update a document in MongoDB?

  • changeOne()
  • updateOne()
  • modifyOne()
  • updateDoc()
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What does the $unset operator do in MongoDB?

  • Sets a field to null
  • Updates a field value
  • Removes a field from a document
  • Adds a new field
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Which method is used to aggregate documents in MongoDB?

  • aggregate()
  • group()
  • merge()
  • compile()
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How do you create a capped collection in MongoDB?

  • addCappedCollection()
  • createCapped()
  • createCollection() with capped
  • newCappedCollection()
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What is the role of the MongoDB config server?

  • Handles replication
  • Manages user accounts
  • Stores metadata and configuration settings for sharding
  • Backs up data
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Which method is used to remove a database in MongoDB?

  • deleteDatabase()
  • dropDatabase()
  • removeDatabase()
  • clearDatabase()
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Which command is used to insert a document in MongoDB?

  • insertDocument()
  • addDocument()
  • insertOne()
  • insertDoc()
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What is GridFS used for in MongoDB?

  • Creating indexes
  • Backing up data
  • Storing large files
  • Sharding data
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Which method is used to find documents in MongoDB?

  • find()
  • fetch()
  • query()
  • search()
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What does the $in operator do in MongoDB?

  • Matches any of the values specified in an array
  • Combines two fields
  • Inverts the query result
  • Checks if a field is null
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Which command is used to rename a collection in MongoDB?

  • updateCollectionName()
  • renameCollection()
  • changeCollectionName()
  • setCollectionName()
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How do you create a user in MongoDB?

  • addUser()
  • createUser()
  • userCreate()
  • newUser()
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How do you enable authentication in MongoDB?

  • Start mongod with --auth
  • Start mongod with --enableAuth
  • Start mongod with --authenticate
  • Start mongod with --secure
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Which command is used to view all collections in a database?

  • view collections
  • get collections
  • show collections
  • list collections
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In MongoDB, which field is added by default to each document?

  • _id
  • uuid
  • doc_num
  • doc_id
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How do you back up a MongoDB database?

  • mongosave
  • mongodump
  • mongobackup
  • mongoexport
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Which command is used to start the MongoDB server?

  • mongod
  • mongo
  • mongodb
  • startmongo
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In MongoDB, a document is stored in which format?

  • BSON
  • CSV
  • XML
  • JSON
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How do you update multiple documents in MongoDB?

  • updateMany()
  • changeMany()
  • updateMultiple()
  • modifyMany()
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What does the MongoDB 'explain' method do?

  • Deletes a document
  • Provides query performance statistics
  • Updates a document
  • Inserts a document
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Which of the following is NOT a MongoDB shell method?

  • find()
  • insert()
  • update()
  • add()
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Which command is used to drop a collection in MongoDB?

  • removeCollection()
  • drop()
  • deleteCollection()
  • dropCollection()
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Which aggregation pipeline stage is used to filter documents?

  • $select
  • $filter
  • $match
  • $search
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How do you create a new database in MongoDB?

  • use <database_name>
  • newDatabase <database_name>
  • create <database_name>
  • db.newDatabase(<database_name>)
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How do you list all databases in MongoDB?

  • list dbs
  • db.show()
  • db.list()
  • show dbs
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How do you restart the MongoDB server?

  • mongod restart
  • mongorestart
  • restart mongod
  • service mongod restart
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