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Who needs the MongoDB C100DEV Certification?

The MongoDB Certified Developer Associate Certification is ideal for individuals who have:

• Experience working with relational databases like SQL Server or Oracle

• A solid understanding of object-oriented programming concepts such as classes, inheritance, encapsulation, and polymorphism

• A technical background with experience in software development or data engineering

Describe content sources that can be monitored by MongoDB software

MongoDB software provides a number of different tools for monitoring your deployment.

The MongoDB Management Service (MMS) is a fully-managed service that monitors MongoDB instances and applications. MMS offers the following features:

• Monitoring and alerting for MongoDB instances and applications, including application-level metrics

• Automated failure detection and recovery

• Automatic detection of new deployments

Alerting on resource utilization, including CPU and memory usage, disk utilization, network throughput, latency, and more. Alerts can be sent by email or SMS message. You can also configure MMS to generate synthetic transactions against your database to generate alerts when performance degrades.

In addition to MMS, you can use third-party tools such as New Relic's MongoDB agent or OpsDash to monitor your deployments.

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MongoDB Certified Developer Associate Exam Sample Questions (Q91-Q96):

NEW QUESTION # 91
We have a movies collection with the following document structure: { _id: ObjectId("573a1390f29313caabcd6223"), genres: [ 'Comedy', 'Drama', 'Family' ], title: 'The Poor Little Rich Girl', released: ISODate("1917-03-05T00:00:00.000Z"), year: 1917, imdb: { rating: 6.9, votes: 884, id: 8443 } }, { _id: ObjectId("573a13e3f29313caabdc08a4"), genres: [ 'Horror', 'Thriller' ], title: 'Mary Loss of Soul', year: 2014, imdb: { rating: '', votes: '', id: 2904798 } } We need to use Aggregation Framework to calculate the following aggregates: -> average imdb rating -> minimum imdb rating -> maximum imdb rating Expected output: [ { _id: null, avg_rating: 6.6934040649367255, min_rating: 1.6, max_rating: 9.6 } ] Please note that some documents have "" (empty string) for the field "imdb.rating". Exclude these documents before aggregation. Which pipeline should you use?

• A. [{ $match: { "imdb.rating": { $ne: "" } } }, { $group: { _id: null, avg_rating: { $avg: "$imdb.rating" }, min_rating: { $min: "$imdb.rating" }, max_rating: { $max: "$imdb.rating" } } }]
• B. [{ $match: { "imdb.rating": { $ne: "" } } }, { $group: { _id: null, avg_rating: { avg: "$imdb.rating" }, min_rating: { min: "$imdb.rating" }, max_rating: { max: "$imdb.rating" } } }]
• C. [{ $match: { "imdb.rating": { $ne: "" } } }, { $group: { _id: null, avg_rating: { $avg: "imdb.rating" }, min_rating: { $min: "imdb.rating" }, max_rating: { $max: "imdb.rating" } } }]
• D. [{ $group: { _id: null, avg_rating: { $avg: "$imdb.rating" }, min_rating: { $min: "$imdb.rating" }, max_rating: { $max: "$imdb.rating" } } }]

Answer: A

Explanation:
https://docs.mongodb.com/manual/aggregation/

NEW QUESTION # 92
What is data modeling in MongoDB world?

• A. A way to decide whether to store your data in the cloud or locally.
• B. A way to show your database with graphs.
• C. A way to organize fields in a document to support your application performance and querying capabilities.
• D. A way to build your application based on how your data is stored.

Answer: C

Explanation:
https://docs.mongodb.com/manual/core/data-modeling-introduction/

NEW QUESTION # 93
In which situations can we consider sharding?

• A. We want to improve read performance for our application.
• B. It takes too long to backup and restore the data set.
• C. A new developer will join your development team soon.
• D. Our dataset is too big to fit in one MongoDB instance.

Answer: A,B,D

Explanation:
https://docs.mongodb.com/manual/sharding/

NEW QUESTION # 94
Select all options where you should use sharding.

• A. Your organization outgrows the most powerful servers available, which limits your vertical scaling capabilities.
• B. Every time you start a new project with MongoDB.
• C. Your server disks are full, but you can scale up.
• D. You have over 6TB per server and operating costs are increasing dramatically.

Answer: A,D

Explanation:
https://docs.mongodb.com/manual/sharding/

NEW QUESTION # 95
Select all true statements regarding to multikey indexes.

• A. Multikey indexes allow us to index on array fields.
• B. An index doesn't become multikey until a document that has an array value is inserted.
• C. Multikey indexes don't support indexes on multiple array fields on single documents.

Answer: A,B,C

Explanation:
https://docs.mongodb.com/manual/core/index-multikey/

NEW QUESTION # 96
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