Free C100DEV Exam Questions - Easiest Way for Success

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Total 411 Questions | Updated On: Sep 14, 2024

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Question 1

Select all true statements regarding to indexes. (select 2)

A : Indexes reduce the number of documents that MongoDB must parse to satisfy a query.

B : Indexes can improve write, update, and delete performance.

C : Indexes are used to increase the speed of our queries.

D : The _id field is not automatically indexed in collection.

Answer: A,C

Question 2

You are a MongoDB Associate Developer and need to demonstrate how to load the Atlas Sample Dataset into your MongoDB Atlas cluster. Your manager has asked you to guide a junior developer through this process to ensure they can independently load the dataset. What steps should the junior developer follow to successfully load the Atlas Sample Dataset?

A : In MongoDB Atlas, navigate to the "Clusters" tab, click on the "Load Sample Dataset" button, and wait for the dataset to be fully loaded.

B : In MongoDB Compass, connect to your cluster, go to the "Import Data" tab, and import the sample dataset by uploading the sample-dataset.json file.

C : Use the MongoDB Atlas API to send a POST request to the /loadSampleDataset endpoint, specifying your cluster ID in the request body.

D : Open the MongoDB Shell, connect to your cluster, and run the command mongoimport --db sample --collection datasets --file sample-dataset.json.

Answer: A

Question 3

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: 'read', db: ''}]})

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

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

Answer: D

Question 4

Where is the MongoDB configuration file usually located?

A :

B :

C :

D :

E :

Answer: B

Question 5

Data modeling. You are considering the use of nesting or references in your data model. Documents can grow rapidly. Which option would be more appropriate?

A : Use of reference.

B : Use of nesting.

Answer: A

Page: 1 / 83

Total 411 Questions | Updated On: Sep 14, 2024

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