Three Easy-to-Use Getcertkey MongoDB C100DEV Exam Practice Questions Formats

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Study C100DEV Reference,Exam C100DEV Simulator Free,C100DEV Reliable Practice Questions,New C100DEV Learning Materials,Certification C100DEV Dumps, Three Easy-to-Use Getcertkey MongoDB C100DEV Exam Practice Questions Formats

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MongoDB is one of the most popular databases in use today and it is used by many companies and organizations. The MongoDB C100DEV is a certification that ensures that the person has the knowledge and skills required to work with MongoDB effectively. In this article, we will discuss some of the benefits of having this certification.

It helps you stand out from other candidates when applying for jobs or promotions within an organization that uses MongoDB.
You will increase your chances of being promoted within your current organization if you have any other relevant certifications such as M100DBA or M100ADMIN

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MongoDB Certified Developer Associate Exam Sample Questions (Q178-Q183):

NEW QUESTION # 178
$group stage can be used multiple times within an aggregation pipeline.

A. False
B. True

Answer: B

Explanation:
https://docs.mongodb.com/manual/reference/operator/aggregation/group/

NEW QUESTION # 179
Suppose you are connected to mongod instance that is already running on port 27000 as admin user. You have to create a new user for an application that has the readWrite role. Use the db.createUser() command to create a user for a CRUD application. The requirements for this user are: -> role: readWrite on esmartdata database -> username: esmart -> password: esmart123 Which command should you use?

A. db.createUser({ user: 'esmart', pwd: 'esmart123', roles: [{role: 'readWrite', db: ''}] })
B. db.createUser({ user: 'esmart', pwd: 'esmart123', roles: [{role: 'read', db: 'esmartdata'}] })
C. db.createUser({ user: 'esmart', pwd: 'esmart123', roles: [{role: 'read+write', db: 'esmartdata'}] })
D. db.createUser({ user: 'esmart', pwd: 'esmart123', roles: [{role: 'readWrite', db: 'esmartdata'}] })

Answer: D

Explanation:
https://docs.mongodb.com/manual/reference/method/db.createUser/

NEW QUESTION # 180
Why is MongoDB using BSON instead of JSON to store data? Select all that apply.

A. BSON simply means 'Binary JSON'.
B. BSON format is not human readable (BSON is machine-readable only).
C. BSON contains metadata to describe a document/object.
D. BSON supports more data types than JSON.

Answer: A,B,C,D

Explanation:
https://www.mongodb.com/json-and-bson

NEW QUESTION # 181
Suppose you want to join two collections in the same database. What aggregation stage do you need to use?

A. $project
B. $lookup
C. $out

Answer: B

Explanation:
https://docs.mongodb.com/manual/reference/operator/aggregation/lookup/

NEW QUESTION # 182
Select all true statements regarding to the _id field in MongoDB documents. (select 4)

A. We can select a non ObjectId type value for _id field when inserting a new document.
B. MongoDB adds an _id field to any inserted document if it doesn't have one.
C. When inserting a document, the _id value is already generated as an ObjectId type, if not directly specified.
D. The _id can be an array data type.
E. The _id values must be unique for the collection.

Answer: A,B,C,E

Explanation:
https://docs.mongodb.com/manual/core/document/ https://docs.mongodb.com/manual/reference/method/ObjectId/

NEW QUESTION # 183
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