Exam Dumps VCE

NO.53 Below is a sample document in a given collection test.
{ a : 5, b : 3, c: 2, d : 1 >
Given a compound index { a: 1, b:l, c:l, d:l}, Which of the below query will not use in-memory sorting? Select all valid.

NO.54 What does the following $slice query return using the following command? db.posts.find( {}, { comments: {
$slice: [ -10, 5 ] } } )

NO.55 Which of the following operators is used to updated a document partially?

NO.56 What does the output x of the following MongoDB aggregation query result into; db.posts.aggregate( [ {
$group: { _id; “$author”, x: { $sum: $likes } } } ] )

NO.57 Which type of indexes does MongoDB support?

NO.58 As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:

NO.59 Which of the following is a valid Replica Set configuration if you want:
1-Have 3 copies of everything
2- That RS3 is never primary
2- That RSI and RS2 can be primary?
You had to see the different configurations, RS3 could be hidden or priority 0 (But not a referee because we need
3 replicas), while RSI and RS2 could NOT have priority 0 or be hidden or anything like that In a 4-member RS RSO , RSI, RS2 and RS3 + Referee, RSO (primary) falls after some write operations that have replicated RSI and RS2 (but NOT RS3), who can get up as the new primary?
The configuration comes and in it we see that RS2 has a hidden: true (or a priority: 0, (I don’t remember)

NO.60 You have designed a web application with mongoDB. You have configured replication. The replica set is in place and function properly. What happens in case of failure?

NO.61 To add a new user and enable authentication in MongoDB, which of the following steps need be executed?

NO.62 Which of the following collections stores authentication credentials in MongoDB?

NO.63 Which option should be used to update all the documents with the specified condition in the MongoDB query?

NO.64 If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?

NO.65 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.66 MongoDB is

NO.67 In what format does mongodump creates backup files?

NO.68 Which of the following index would be optimum for the query?
Select all valid. db.test.find( { a : 5, c : 2 })

NO.69 Below is a sample document of “orders” collection

NO.70 Consider the following posts document:

Which of the following queries will return the documents but with only the first two tags in the tags array?

NO.71 Which of the following about Capped Collections is correct?