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What is the salary of a MongoDB C100DEV Certified Professional?

The Average salary of different countries of MongoDB C100DEV Certified professional

UK - Pounds 60,000

United States - USD 96,000

India - INR 5,60,000

The advantages of having a MongoDB C100DEV Certification

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

MongoDB Certified Developer Associate Exam Sample Questions (Q230-Q235):

NEW QUESTION # 230
Select true statements about index performance.

A. For the fastest processing, we should make sure our indexes fit entirely in RAM.B. Indexes don't have to be completely stored in RAM, but permanent disk access to retrieve index information will have a performance impact.C. Indexes cannot decrease insert throughput.

Answer: A,B

Explanation:
https://www.mongodb.com/blog/post/performance-best-practices-indexing


NEW QUESTION # 231
What stages will cause a merge on the primary shard for a database?

A. $lookupB. $groupC. $out

Answer: A,C

Explanation:
$group stage can potentially result in a merge, but a random shard will be selected for the merging.
https://docs.mongodb.com/manual/reference/operator/aggregation/out/
https://docs.mongodb.com/manual/reference/operator/aggregation/lookup/
https://docs.mongodb.com/manual/reference/operator/aggregation/group/


NEW QUESTION # 232
There is a collection named products in MongoDB database. Your coworker wants to know how many products are in this collection (number of documents in the collection) from the United States. Which query should you use?

A. db.products.find( { country: "USA" } )B. db.products.find( country == "USA" ).count()C. db.products.find( country = "USA" ).count()D. db.products.find( { country: "USA" } ).count()

Answer: D

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


NEW QUESTION # 233
Select all true statements regarding to the role of fields and values in a MongoDB document. (select 2)

A. Each field has a value associated with it.B. A field is a unique identifier for a specific data point.C. You can have duplicate field names within the same level of a single document.D. Values don't need to be attached to fields and can be standalone data points.

Answer: A,B

Explanation:
https://docs.mongodb.com/manual/core/document/


NEW QUESTION # 234
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 data analysis. The requirements for this user are: -> role: read on esmartdata database -> username: dataScientist -> password: ds123sci456 Which command should you use?

A. db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'write', db: 'esmartdata'}] })B. db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'r', db: 'esmartdata'}] })C. db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'read', db: ''}] })D. db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'read', db: 'esmartdata'}] })

Answer: D

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


NEW QUESTION # 235
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