Read Operations MCQ

Test your knowledge with important Read Operations MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Read Operations MCQs at Bissoy

• An index cannot cover a query on a _______ collection when run against a mongos if the index does not contain the shard key.
  ক

  vertical

  খ

  sharded

  গ

  horizontal

  ঘ

  none of the mentioned
• Which of the following operator is not very selective?
  ক

  $nine

  খ

  $nin

  গ

  $ain

  ঘ

  None of the mentioned
• ____________ is a client or database-generated identifier that uniquely identifies this message.
  ক

  messageLength

  খ

  responseTo

  গ

  requestID

  ঘ

  all of the mentioned
• The __________ method returns a document that includes a metrics field.
  ক

  db.serverStats()

  খ

  db.serverStatus()

  গ

  db.status()

  ঘ

  all of the mentioned
• ______________ specifies the number of documents to return in each batch of the response from the MongoDB instance.
  ক

  cursor.batchSize(size)

  খ

  cursor.Size(size)

  গ

  cursor.batch(size)

  ঘ

  all of the mentioned
• To describe the message structure, a ________ like struct is used.
  ক

  Pascal

  খ

  C++

  গ

  C

  ঘ

  Java
• Which of the following will display complete list of available cursor flags?
  ক

  cursor.Option()

  খ

  cursor.addOption()

  গ

  cursor.addOptions()

  ঘ

  all of the mentioned
• Which of the following flag can be set by mongo shell?
  ক

  Timeout

  খ

  noTimeout

  গ

  Time

  ঘ

  None of the mentioned
• Which of the following is not a projection operator?
  ক

  $slice

  খ

  $elemMatch

  গ

  $

  ঘ

  None of the mentioned
• To suppress the _id field from the result set, specify _________ in the projection document.
  ক

  _id: 1

  খ

  _id: 0

  গ

  _id: it

  ঘ

  None of the mentioned
• Which of the following functionality is used for aggregation framework?
  ক

  $match

  খ

  $project

  গ

  $projectmatch

  ঘ

  All of the mentioned
• Which of the following is the second argument to projection?
  ক

  findOne()

  খ

  findOne1()

  গ

  selectOne()

  ঘ

  find()
• Which of the following method returns one document?
  ক

  findOne()

  খ

  findOne1()

  গ

  selectOne()

  ঘ

  all of the mentioned
• In aggregation pipeline, the _______ pipeline stage provides access to MongoDB queries.
  ক

  $catch

  খ

  $match

  গ

  $batch

  ঘ

  All of the mentioned
• The order of documents returned by a query is not defined unless you specify a ______
  ক

  sortfind()

  খ

  sortelse()

  গ

  sort()

  ঘ

  none of the mentioned