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MongoDB MCQ Quiz (Multiple Choice Questions And Answers)

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21. Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?

  • Null, Number, String and Object
  • Number, Null, String and Object
  • String, Null, Number and Object
  • Null, Number, Object and String
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22. In a sharded replica set environment, w defines the level and kind of write concern. Which of the following values of w specifies to return success only after a majority of voting members have acknowledged?

  • n
  • majority
  • m
  • major
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23. Which of the following methods can be used on a cursor object?

  • cursor.next()
  • cursor.hasNext()
  • cursor.forEach()
  • All of the above
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24. mongoimport command is used to:

  • import all the data from one database to another
  • import all the data from one collection to another
  • imports content from an Extended JSON, CSV, or TSV export created by mongoexport
  • import all the MongoDB data from one format to another
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25. In our posts collection, which command can be used to find all the posts whose author names begin lie between "A" and "C" in dictionary order?

  • db.posts.find( { post_author : { $gte : "A" , $lte : "C" } } );
  • db.posts.find( { post_author : { $gte : "C" , $lte : "A" } } );
  • db.posts.find( { post_author : { $gt : "A" , $lt : "C" } } );
  • This type of search is not supported by MongoDB. $lt and $gt operators are applicable only for numeric values.
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