New 2024 Guaranteed Success with PremiumVCEDump C100DBA Dumps MongoDB PDF Questions [Q50-Q68]

20 Apr, 2024 By admin C100DBA, MongoDB 0 Comments

New 2024 Guaranteed Success with PremiumVCEDump C100DBA Dumps MongoDB PDF Questions [Q50-Q68]

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New 2024 Guaranteed Success with PremiumVCEDump C100DBA Dumps MongoDB PDF Questions

Exceptional Practice To MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Pass the First Time

Earning the MongoDB Certified DBA Associate certification can be a valuable asset for individuals who are looking to advance their careers in database administration. It can also benefit organizations that use MongoDB by ensuring that their DBAs have the necessary skills and knowledge to manage their databases effectively.

MongoDB C100DBA exam is a certification exam designed for database administrators who work with MongoDB 4.4. C100DBA exam is intended to test the candidate’s knowledge of MongoDB architecture, schema design, deployment, security, and maintenance. By passing C100DBA exam, a candidate can demonstrate their expertise in administering MongoDB databases and receive a MongoDB Certified DBA Associate certification.

QUESTION 50
‘$set’ sets the value of

Code block

Name/value pair

Key

None of the above

QUESTION 51
MongoDB is

None of the above

Object-oriented DBMS

Relational DBMS

Document-oriented DBMS

QUESTION 52
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 } )

QUESTION 53
MongoDB is a schema-less design.

False

True

QUESTION 54
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

QUESTION 55
In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?

Sharding

Properly defined user roles

Replication

Put indexes on all of your documents

The proper storage engine

QUESTION 56
Which of the following operator can be used to limit the number of documents in an array field of a document after an update is performed?

$arrayLimit

$push along with $each, $sort and $slice

$removeFromSet

None of the above

QUESTION 57
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});

QUESTION 58
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

QUESTION 59
Which of the following operator can be used to control the number of items of an array that a query returns?

$ elemMatch

$slice

MongoDB does not support partial retrieval of items from an array

QUESTION 60
What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them hidden. The set also has an arbiter?

None of the above

QUESTION 61
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

QUESTION 62
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

QUESTION 63
Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc.
Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

db.posts.finOne({},{_id:0, post_text:1})

db.posts.findOne({post_text: 1})

db.posts.find({},{_id:Of post_text:1})

db.posts.finOne({},{post_text:1})

QUESTION 64
Which of the following does MongoDB use to provide High Scalability?

Replication

Write Concern

Indexing

Sharding

QUESTION 65
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

QUESTION 66
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?

200, more

No limit, none

20, it

50, it

QUESTION 67
The oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. All the replica set members contain a copy of the oplog in the following collection:

<replicasetid>.oplog.rs

oplog.rs

<database>..oplog.rs

local.oplog.rs

QUESTION 68
Below is a sample document of “orders” collection