Update Operations

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Question 1

What is the purpose of update operations in MongoDB?

  • A

    Insert documents

  • B

    Retrieve documents

  • C

    Modify existing documents

  • D

    Delete documents

Question 2

Which method updates only one matching document?

  • A

    updateAll()

  • B

    updateOne()

  • C

    updateMany()

  • D

    replaceMany()

Question 3

Which method updates multiple documents?

  • A

    updateOne()

  • B

    updateAll()

  • C

    updateMany()

  • D

    replaceOne()

Question 4

What does replaceOne() do?

  • A

    Deletes a document

  • B

    Updates specific fields

  • C

    Replaces entire document

  • D

    Adds new document

Question 5

Which operator is commonly used with update operations?

  • A

    $set

  • B

    $find

  • C

    $insert

  • D

    $delete

Question 6

What happens if no document matches updateOne()?

  • A

    Error occurs

  • B

    Nothing is updated

  • C

    Document is deleted

  • D

    Database crashes

Question 7

Which method should be used to update all matching records?

  • A

    updateOne()

  • B

    replaceOne()

  • C

    updateMany()

  • D

    insertMany()

Question 8

What happens if you use updateOne() without $set?

  • A

    Only specific fields update

  • B

    Entire document is replaced

  • C

    Error occurs

  • D

    Nothing happens

Question 9

Which method is best for changing only one field in multiple documents?

  • A

    updateMany()

  • B

    replaceOne()

  • C

    insertMany()

  • D

    findOne()

Question 10

Which method ensures only one document is fully replaced?

  • A

    updateMany()

  • B

    updateOne()

  • C

    replaceOne()

  • D

    insertOne()

There are 10 questions to complete.

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