最新のC100DEV問題集で試験を準備する

MongoDB C100DEV 試験概要:

MongoDB C100DEV 試験シラバストピック:

MongoDB Certified Developer Associate 認定 C100DEV 試験問題：

問題 #1

Select scenarios that are best suited for applying the Schema Versioning Pattern.

A. Your team was assigned to update the current schema with additional fields without shutting down the system for this upgrade. However, all documents need to be quickly updated.
B. There is a requirement to keep multiple versions of a document, and those versions can have different fields for each version in your application.

問題 #2

In your database there is a movies collection with the following document structure: { _id: ObjectId("573a1390f29313caabcd42e8"), genres: [ 'Short', 'Western' ], title: 'The Great Train Robbery', rated: 'TV-G', year: 1903, imdb: { rating: 7.4, votes: 9847, id: 439 }, countries: [ 'USA' ] }, { _id: ObjectId("573a1390f29313caabcd4323"), genres: [ 'Short', 'Drama', 'Fantasy' ], rated: 'UNRATED', title: 'The Land Beyond the Sunset', year: 1912, imdb: { rating: 7.1, votes: 448, id: 488 }, countries: [ 'USA' ] } In some documents, where there is no rating information for movie, the value is set to '' (empty string). With that in mind, which of the following queries will return the title and rating (see below) of top 3 rated movies in this collection?

A. db.movies.find( { 'imdb.rating': { $eq: '' } }, { _id: 0, title: 1, 'imdb.rating': 1 } ).sort( { 'imdb.rating': -1 } ).limit(3)
B. db.movies.find( { 'imdb.rating': { $ne: '' } }, { _id: 0, title: 1, 'imdb.rating': 1 } ).sort( { 'imdb.rating': -1 } ).limit(3)
C. db.movies.find( {}, { _id: 0, title: 1, 'imdb.rating': 1 } ).sort( { 'imdb.rating': 1 } ).limit(3)
D. db.movies.find( { 'imdb.rating': { $ne: '' } }, { _id: 0, title: 1, 'imdb.rating': 1 } ).sort( { 'imdb.rating': 1 } ).limit(3)

問題 #3

Select all true statements about $lookup and $graphLookup operators.

A. $graphLookup stage provides graph-like capabilities.
B. $graphLookup stage cannot be used without $lookup stage.
C. $lookup stage performs a recursive search on a collection, with options for restricting the search by recursion depth and query filter.

問題 #4

Given a movies collection where each document has the following structure: { _id: ObjectId("573a1390f29313caabcd60e4"), genres: [ 'Short', 'Comedy', 'Drama' ], title: 'The Immigrant', year: 1917, imdb: { rating: 7.8, votes: 4680, id: 8133 }, countries: [ 'USA' ] } Which of the following queries will find all Comedy movies that were made in 2000? (select 2)

A. db.movies.find( { year: 2000, genres: "Comedy" } )
B. db.movies.find( { $or: [ { year: 2000 }, { genres: "Comedy" } ] } )
C. db.movies.find( { $and: [ { year: 2000 }, { genres: "Comedy" } ] } )
D. db.movies.find( { year: 2000 }, { genres: "Comedy" } )

問題 #5

Which of the following scenarios best suits the use of the Tree Pattern?

A. You want to store additional information about your products that are less used by your application.
B. Product categories in the online store.

解説：