[Jun 26, 2022] New Updated C100DBA Exam Questions 2022

Updated Free MongoDB C100DBA Test Engine Questions with 123 Q&As

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The MongoDB C100DBA certification exam is a challenging exam that aims at demonstrating the knowledge of administering and using MongoDB. The exam is designed to test your knowledge of administering, installing, configuring, monitoring, securing, and troubleshooting MongoDB. This article will cover the objectives that you should know for this certification along with some tips on how to pass it. MongoDB C100DBA Dumps is the latest and the most useful exam dumps for the MongoDB C100DBA certification exam.

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NEW QUESTION 31
‘mongoimport’ command is used for

 Batch data insertion

 None of the above

 Multiple command import

 Multiple command insertion

NEW QUESTION 32
What tool do you use to see if you have a problem in the consumption of disk I / 0?

Mongoperf

NEW QUESTION 33
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?

 db.posts.find({author:”Tom”}.limit({tags:2})

 db.posts.find({author:”Tom”}.limit($slice:{tags:2>)

 Both “db.posts.find({author:”Tom”},{tags:{$slice:2}})” and
“db.posts.find({author:”Tom”}).limit($slice: {tags:2})” are valid. $slice works both with projection and limit.

 db.posts.find({author:”Tom”>,{tags:{$slice:2})

NEW QUESTION 34
MongoDB is

 None of the above

 Object-oriented DBMS

 Relational DBMS

 Document-oriented DBMS

NEW QUESTION 35
Consider that you have a collection called population which has fields state and city. Which of the following query will calculate the population grouped by state and city?

 db.population.aggregate( [{ $group: { _id: { state: “$state”, city; “$city” },pop: { $sum: 1 > > >] )

 db.population.aggregate( [{ $group: { _id: { state: Estate”, city: “$city” },pop: { $pop: 1 } } }] )

 db.population.aggregate( [{ $group: { _id: { state: Estate”, city: n$city” },pop: { $sum: “$pop” } } }] )

 db.population.aggregate( [{ $group: { _id: { city: “$city” },pop: { $sum: “$pop” } } }] )Multi Document Transaction is not supported by MongoDB

NEW QUESTION 36
Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?

 Number, Null, String and Object

 Null, Number, Object and String

 Null, Number, String and Object

 String, Null, Number and Object

NEW QUESTION 37
What is the on-premise solution having functionality equivalent to cloud manager?

 Service Manager

 Replica Manager

 Ops Manager

 Journaling

NEW QUESTION 38
In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)

 Skip and limit nullify each other. Hence returning the first five documents

 Limits the first five documents and then return them in reverse order

 Skips the first five documents and returns the sixth document five times

 Skips the first five documents and returns the next five

NEW QUESTION 39
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?

 db.posts.createIndex({commerits.$.author”:-l});

 db.posts.createIndex({comments.$.author”: {$desc:l>});

 db.posts.createIndex({comments.author”:-l});

NEW QUESTION 40
What is the maximum size of a MongoDB document

 16 MB

 12 MB

 2 MB

 There is no maximum size. It depends on the RAM.

NEW QUESTION 41
Which of the following is true about aggregation framework?

 Each aggregation operator need to return atleast one of more documents as a result

 the aggregate command operates on a multiple collection

 A single aggregation framework operator can be used more than once in a query

 Pipeline expressions are stateless except accumulator expressions used with $group operator

NEW QUESTION 42
What does the output x of the following MongoDB aggregation query result into; db.posts.aggregate( [ {
$group: { _id; “$author”, x: { $sum: $likes } } } ] )

 Average of likes on all the posts of an author, grouped by author

 Number of posts by an author

 Sum of likes on all the posts by all the authors

 Sum of likes on all the posts by an author, grouped by author

NEW QUESTION 43
Consider the following documents:

You perform the following query;

How many documents will be updated by the query?

 0

 1

 2

 3

 5

NEW QUESTION 44
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.

 db.sample.update( { “_id” : 3 } , { “$set” : { “_id” : 7 , “c” : 4 > > )

 db.sample.update( { “_id” : 3 > , { “_id” : 7 , “c” : 4 > , { “justOne” : true > ) / This operation cannot be done with a single query.

 db.sample.update( { “_id” : 3 > , { “_id” : 7 , “c” : 4 , { “$unset” : [ “a” , “b” ] } } )

 db.sample.update( { “_id” : 3 > , { “_id” : 7 , “c” : 4 > )

NEW QUESTION 45
Update If Correct is an approach for which of the following concepts in MongoDB:

 Concurrency Control

 Atomicity

 Performance Management

 Transaction Management

NEW QUESTION 46
What tool would you use if you want to save a gif file in mongo?

mongofile

NEW QUESTION 47
Which of the following about Capped Collections is correct?

 Fixed Size

 Only “Fixed Size” and “High-throughput operations that insert and retrieve documents based on insertion order”

 High-throughput operations that insert and retrieve documents based on insertion order

 If the allocated space for a capped collection exceeds, it stops inserting new documents

NEW QUESTION 48
What is the output of following two commands in MongoDB: db. posts. insert({n_id”:l}) db.posts.insert({“_id”:l})

 Two documents will be inserted with _id as 1

 MongoDB will automatically increment the _id of the second document as 2

 This will throw a duplicate key error

 It will insert two documents and throw a warning to the user

NEW QUESTION 49
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)

 ORS1

 ORS2

 ORS3

 O arbiter

 RSO

NEW QUESTION 50
Which of the following is incorrect statement about find and findOne operations in MongoDB?

 findQ returns all the documents in a collection while findOne() retrieves only the first one.

 find.limit(l) is not the same query as findOne()

 findOneQ returns the actual first document retrieved from a collection

 findQ and findOneQ returns cursors to the collection documents

NEW QUESTION 51
Which mongodb tool is used to report details on number of database operations in MongoDB?

 mongorestore

 mongostat

 mongodump

 mongotop

NEW QUESTION 52
You are comparing values of different BSON types in mongodb. You want to compare from lowest to highest.
Which comparison order is used?

 MinKey, Null, Numbers,Symbol, String,Object,Array,BinData

 MinKey, Null, Numbers,Object,Array,BinData,Symbol, String

 Object/Array^inData/Symbol,MinKey, Null, Numbers,String

 Objec^Array^inData,Symbol, String,MinKey, Null, Numbers

NEW QUESTION 53
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.

 db.collection.update({b:456>, {$inc: {a:l> })

 db.collection.find( {a : 232} )

 db.collection.insert( { a:341})

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What are the questions asked in MongoDB C100DBA Exam

The questions are to be answered using Write, Flush, Recover, and Update policies for MongoDB. Command-line interface tools are used to administer, install, configure, monitor, secure, and troubleshoot MongoDB. Dumps offered by MongoDB C100DBA certification exam help people to improve their weaknesses in this entry-level certification exam.

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