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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

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MongoDB Certified Developer Associate Exam Sample Questions (Q157-Q162):

NEW QUESTION # 157
Suppose you have a restaurants collection with the following document structure: { id: ObjectId("5eb3d668b31de5d588f42931"), address: { building: '6409', coord: [ -74.00528899999999, 40.628886 ], street: '11 Avenue', zipcode: '11219' }, borough: 'Brooklyn', cuisine: 'American', grades: [ { date: ISODate("2014-07-18T00:00:00.000Z"), grade: 'A', score: 12 }, { date: ISODate("2013-07-30T00:00:00.000Z"), grade: 'A', score: 12 }, { date: ISODate("2013-02-13T00:00:00.000Z"), grade: 'A', score: 11 }, { date: ISODate("2012-08-16T00:00:00.000Z"), grade: 'A', score: 2 }, { date: ISODate("2011-08-17T00:00:00.000Z"), grade: 'A', score: 11 } ], name: 'Regina Caterers', restaurantid: '40356649' } You don't have any indexes so far. What will the query plan look like for the following query?
db.restaurants.find( { "cuisine": "American" } )

• A. IXSCAN
• B. COLLSCAN

Answer: B Explanation:
https://docs.mongodb.com/manual/indexes/
NEW QUESTION # 158
What is the built-in database called admin in MongoDB for?

• A. The admin database stores data describing the MongoDB server. For replica sets, it also stores information about the replication process.
• B. The admin database plays an important role in the authentication and authorization process. Certain actions performed by administrators also require access to this database.
• C. The admin database is used to store information about shards in shared MongoDB cluster.

Answer: B Explanation:
https://docs.mongodb.com/manual/tutorial/manage-users-and-roles/
NEW QUESTION # 159
Suppose you have a mobilegames collection with the following document structure:
{ game: "Fishing Clash", company: "Ten Square Games", platforms: ['Android', 'IOS'], ...
releaseUSA: ISODate("2017-04-09T01:00:00+01:00"),
releaseFrance: ISODate("2017-04-09T01:00:00+01:00"),
releaseItaly: ISODate("2017-08-17T01:00:00+01:00"), ... }
You want to redesign your document structure as below:
{ game: "Fishing Clash", company: "Ten Square Games", platforms: ['Android', 'IOS'],
releases: [ { location: "USA", date: ISODate("2017-04-09T01:00:00+01:00") },
{ location: "France", date: ISODate("2017-04-09T01:00:00+01:00") },
{ location: "Italy", date: ISODate("2017-08-17T01:00:00+01:00") }, ], }
Which pattern solution will you use to solve this problem?

• A. The Bucket Pattern.
• B. The Attribute Pattern.
• C. The Subset Pattern.
• D. The Schema Versioning Pattern.
• E. The Extended Reference Pattern.

Answer: B Explanation:
https://www.mongodb.com/blog/post/building-with-patterns-the-attribute-pattern
NEW QUESTION # 160
Which of the following processes are heavily reliant on available CPU?

• A. Read operations
• B. Aggregation
• C. Write operations

Answer: A,B,C
NEW QUESTION # 161
Suppose you insert the following documents into companies collection: db.companies.insertMany([ {"id": 1, "name": "Facebook"}, {"id": 1, "name": "Twitter"}, {"id": 2, "name": "Tesla"}, {"id": 3, "name": "Amazon"} ], {"ordered": false}) Select all true statements about this operation. (select 3)

• A. MongoDB will insert each document with a unique _id value into the collection.
• B. Two documents will be inserted into the collection.
• C. One document will be inserted into the collection.
• D. Three documents will be inserted into the collection.
• E. This insert is unordered.

Answer: A,D,E Explanation:
https://docs.mongodb.com/manual/reference/method/db.collection.insertMany/
NEW QUESTION # 162
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