MongoDB C100DEV Actual Free Exam Questions & Community Discussion

Suppose we have a shipwrecks collection with the following document structure: { _id: ObjectId("578f6fa2df35c7fbdbaed8ce"), feature_type: 'Wrecks - Visible', watlev: 'always dry', coordinates: [ -79.9469681, 9.3729954 ] } Your application will often query based on the coordinates field. How to create a 2dsphere geospatial index for the coordinates field?

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?

The $sortByCount stage is equivalent to:

Which of the following commands will add a collection that is stored in BSON file to a MongoDB cluster?

Assign typical operational tasks to the Data Scientist.

We can use REGEX in our queries in MongoDB - JavaScript regular expression syntax.

Suppose you have a books collection with title field. Which of the following queries will return all books with a title ending in 'ian'?

Select true statement regarding to the MongoDB Atlas. (select 1)

Select all true statements about the update operation. (select 2)

A collection called players contains the following documents:
[ { _id: 1, user: 'Tom', scores: [ 23, 56, 3, 52, 62 ], bonus: 5 }, { _id: 2, user: 'Jane', scores: [ 42, 50, 10 ], bonus: 3 } ]
You want to add additional fields to each document:
-> total_score (sum of the scores Array) -> avg_score (average score in scores Array) -> total_score_with_bonus (total_score + bonus) Expected output: [ { _id: 1, user: 'Tom', scores: [ 23, 56, 3, 52, 62 ], bonus: 5, total_score: 196, avg_score: 39.2, total_score_with_bonus: 201 }, { _id: 2, user: 'Jane', scores: [ 42, 50, 10 ], bonus: 3, total_score: 102, avg_score: 34, total_score_with_bonus: 105 } ]
Which query do you need to use?

Select all true statement regarding to the MongoDB (BSON, JSON). (select 3)

Which of the following constraints might impact your data model for MongoDB?