Enhance your career with C100DBA PDF Dumps – True MongoDB Exam Questions [Q11-Q25]

NO.11 Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?

NO.12 Which of the following does MongoDB use to provide High Availability and fault tolerance?

NO.13 In a replicated cluster, which of the following node would only be used during an election?

NO.14 What does the following query do when performed on the posts collection? db.posts.update({_id:l},{Title:This is post with ID 1″})

NO.15 Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?

NO.16 What does the following $slice query return using the following command? db.posts.find( {}, { comments: {
$slice: [ -10, 5 ] } } )

NO.17 Consider the following example document:
{
“_id”: Objectld(“5360c0a0a655a60674680bbe”),
“user”
“login”: “irOn”
“description”: “Made of steel”
“date”: ISODate(“2014-04-30T09:16:45.836Z”),
}
>
and index creation command:
db.users.createlndex( { “user.login”: 1, “user.date”: -1 }, “mylndex” ) When performing the following query:
db.users.find( { “user.login”: /Air.*/ },
{ “user”:1, “_id”:0 > ).sort( { “user.date”:1 > )
which of the following statements correctly describe how MongoDB will handle the query? Check all that apply.

NO.18 When should we consider representing a one-to-many relationship in an embedded collection instead of separate collection?

NO.19 Consider the following example document from the sample collection. All documents in this collection have the same schema.

Which of the following queries will replace this with the document.

NO.20 Which operations add new documents to a collection?

NO.21 Which of the following operators is used to updated a document partially?

NO.22 In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)

NO.23 By default, the MongoDB cursor in mongo shell is configured to return how many documents? To get the next set of documents, which command is used?

NO.24 What is the maximum size of a MongoDB document

NO.25 The________operator can be used to identify an element in the array to be updated without explicitly specifying the position of the element.