Free C100DBA Exam Braindumps (page: 2)

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Which features of relational database management systems were deliberately omitted in MongoDB and help us to obtain horizontal scalability? Check all that apply.

  1. Multi-statement transactions
  2. Joins
  3. Authentication

Answer(s): A,B



The following aggregation option is used to specify the specific fields that needs to be passed to the next stage of the aggregation pipeline:

  1. $project
  2. $aggregate
  3. $match
  4. $group

Answer(s): A



In a collection that contains 100 post documents, what does the following command do? db. posts. find().skip(5).limit(5)

  1. Skip and limit nullify each other. Hence returning the first five documents.
  2. Skips the first five documents and returns the next five
  3. Limits the first five documents and then return them in reverse order
  4. Skips the first five documents and returns the sixth document five times

Answer(s): B



What tool do you use to see if you have a problem in the consumption of disk I / 0?

  1. Mongoperf
  2. mongofile

Answer(s): A






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