MongoDB C100DBA最新問題集[2024]高得点を掴み取れ
C100DBA問題集Fast2test100%合格率保証
MongoDB C100DBA試験は、MongoDBデータベースの管理と管理における個人の習熟度を評価する業界に認識された認定試験です。 MongoDBは、柔軟性、スケーラビリティ、パフォーマンスに広く使用されている人気のあるNOSQLデータベースです。 C100DBA試験は、MongoDBデータベースのインストール、構成、および維持に必要なスキルをテストし、パフォーマンスの問題をトラブルシューティングし、データの可用性とセキュリティを確保するために設計されています。
MongoDB C100DBA認定試験は、MongoDBデータベースの管理における個人の知識とスキルを評価するように設計されています。この試験は、データベースソフトウェアの最新バージョンであるMongoDB 4.4に基づいています。この試験では、インストールと構成、データモデリング、セキュリティ、パフォーマンスチューニング、バックアップと回復など、幅広いトピックをカバーしています。この試験は60の複数選択の質問で構成されており、90分の時間制限があります。
質問 # 33
The following aggregation option is used to specify the specific fields that needs to be passed to the next stage of the aggregation pipeline:
- A. $aggregate
- B. $group
- C. $match
- D. $project
正解：D
質問 # 34
Consider that our posts collection contains an array field called tags that contains tags that the user enters. {
Which of the following commands will find all the posts that have been tagged as tutorial.
- A. db.posts.find( { $array : {tags: "tutorial") > );
- B. db.posts.find( { tags : "tutorial" } );
- C. db.posts.findInArray( { tags : "tutorial" > );
- D. db.posts.find( { tags : ["tutorial"] } );
正解：B
質問 # 35
Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc.
Which of the following query retrieves ONLY the key named post_text from the first document retrieved?
- A. db.posts.finOne({},{post_text:1})
- B. db.posts.finOne({},{_id:0, post_text:1})
- C. db.posts.find({},{_id:Of post_text:1})
- D. db.posts.findOne({post_text: 1})
正解：B
質問 # 36
In a collection that contains 100 post documents, what does the following command do? db. posts. find().skip(5).limit(5)
- A. Skips the first five documents and returns the sixth document five times
- B. Skips the first five documents and returns the next five
- C. Limits the first five documents and then return them in reverse order
- D. Skip and limit nullify each other. Hence returning the first five documents.
正解：B
質問 # 37
Which of the following operator can be used to control the number of items of an array that a query returns?
- A. $
- B. $slice
- C. $ elemMatch
- D. MongoDB does not support partial retrieval of items from an array
正解：B
質問 # 38
Which features of relational database management systems were deliberately omitted in MongoDB and help us to obtain horizontal scalability? Check all that apply.
- A. Multi-statement transactions
- B. Joins
- C. Authentication
正解：A、B
質問 # 39
What does the following $slice query return using the following command? db.posts.find( {}, { comments: {
$slice: [ -10, 5 ] } } )
- A. Returns 5 comments, beginning with the last 10 items
- B. Returns 10 comments, beginning with the first
- C. Returns 10 comments, beginning with the last
- D. Returns 5 comments, beginning with the first 10 items
正解：A
質問 # 40
Which of the following index would be optimum for the query?
Select all valid. db.test.find( { a : 5, c : 2 })
- A. CH db.test.ensurelndex( { a :1, c:l})
- B. db.test.ensurelndex( { a: 1, b :1, c:l, d:l})
- C. db.test.ensurelndex( { a : 1, c: 1, d: 1, b : 1})
- D. db.test.ensurelndex( { c:l, a: 1})
正解：A、C
質問 # 41
Below is a sample document of "orders" collection
- A. $sort
正解：A
質問 # 42
Which of the following aggregation commands in MongoDB does not support sharded collections?
- A. All of the above
- B. group
- C. mapReduce
- D. aggregate
正解：B
質問 # 43
Consider the following example document:
{
"_id": Objectld("5360c0a0a655a60674680bbe"),
"user"
"login": "irOn"
"description": "Made of steel"
"date": ISODate("2014-04-30T09:16:45.836Z"),
}
>
and index creation command:
db.users.createlndex( { "user.login": 1, "user.date": -1 }, "mylndex" ) When performing the following query:
db.users.find( { "user.login": /Air.*/ },
{ "user":1, "_id":0 > ).sort( { "user.date":1 > )
which of the following statements correctly describe how MongoDB will handle the query? Check all that apply.
- A. As a covered query using "mylndex" because we are filtering out "_id" and only returning "user.login"
- B. As an indexed query using "mylndex" because field "user.login" is indexed
- C. None of the above
- D. As an optimized sort query (scanAndOrder = false) using "mylndex" because we are sorting on an indexed field
- E. MongoDB will need to do a table/collection scan to find matching documents
正解：B
質問 # 44
What is the defau size of a GridFS chunk?
- A. 1 MB
- B. 16 MB
- C. 255 K
- D. 2 MB
正解：C
質問 # 45
Which of the following needs to be performed prior to initiate backup on a sharded cluster?
- A. db.stopBalancer( )
- B. db.stopServer( )
- C. sh.stopServer( )
- D. sh.stopBalancer( )
正解：D
質問 # 46
Update If Correct is an approach for which of the following concepts in MongoDB:
- A. Atomicity
- B. Transaction Management
- C. Concurrency Control
- D. Performance Management
正解：C
質問 # 47
Which of the following commands will return all the posts with number of likes greater than 100 and less than
200, both inclusive?
- A. db.posts.find({ likes : { $gt : 100 , $lte : 200 } } );
- B. db.posts.find({ likes : { $gte : 100, $lt : 200 } } );
- C. db.posts.find({ likes : { $gte : 100 , $lte : 200 } } );
- D. db.posts.find({ likes : { $gt : 100, $lt : 200 > > );
正解：C
質問 # 48
Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?
- A. db.posts.createIndex({^commerits.author";-!});
- B. db.posts.createIndex({^comments.$.author":-l});
- C. db. posts.createIndex({^comments.author" :1});
正解：A
質問 # 49
Dada una coleccion, cuales devuelve con la siguiente query db.coleccion.find({nombre:"ruben",apellido:"gomez"},{nombre:l,apellido:l,aficion:l});
- A. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "ruben", "apellido" : "Pablo" , "aficion" : u "flipar"}
- B. { "-id" : Objectld("580a42b5dfblb5al7427d302"), "nombre" : "ruben", "apellido" : "gomez", "aficion" : v u "flipar" }
- C. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "Luis", "apellido" : "gomez", "aficion" : u "flipar" }
- D. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "ruben", "apellido" : "gomez" >
正解：B、D
質問 # 50
The oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. All the replica set members contain a copy of the oplog in the following collection:
- A. local.oplog.rs
- B. <replicasetid>.oplog.rs
- C. oplog.rs
- D. <database>..oplog.rs
正解：A
質問 # 51
Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?
- A. db.posts.createIndex({commerits.$.author":-l});
- B. db.posts.createIndex({comments.author":-l});
- C. db.posts.createIndex({comments.$.author": {$desc:l>});
正解：B
質問 # 52
Consider the following example document:
{
"_id": Objectld("5360c0a0a655a60674680bbe"),
"user"
"login": "irOn"
"description": "Made of steel"
"date": ISODate("2014-04-30T09:16:45.836Z"),
}
>
and index creation command:
db.users.createlndex( { "user.login": 1, "user.date": -1 }, "mylndex" )
When performing the following query:
db.users.find( { "user.login": /Air.*/ }, { "user":1, "_id":0 } ).sort( { "user.date":1 } )
which of the following statements correctly describe how MongoDB will handle the query? Check all that apply.
- A. As a covered query using "mylndex" because we are filtering out "_id" and only returning "user.login"
- B. As an indexed query using "mylndex" because field "user.login" is indexed
- C. None of the above
- D. As an optimized sort query (scanAndOrder = false) using "mylndex" because we are sorting on an indexed field
- E. MongoDB will need to do a table/collection scan to find matching documents
正解：B
質問 # 53
What is the maximum size of a MongoDB document
- A. There is no maximum size. It depends on the RAM.
- B. 12 MB
- C. 2 MB
- D. 16 MB
正解：D
質問 # 54
Which of the following commands finds all the documents in the posts collection with post timestamp field as null?
- A. db.posts.find( { post_timestamp: { $type: null } } )
- B. db.posts.find( { post_timestamp : { $type; 10 > > )
- C. db.posts.find( { post_timestamp: { $fieldtype: 10 } } )
- D. db.posts.find( { post_timestamp: { $fieldtype: null } } )
正解：A
質問 # 55
Which of the following is incorrect statement about find and findOne operations in MongoDB?
- A. findQ and findOneQ returns cursors to the collection documents
- B. findQ returns all the documents in a collection while findOne() retrieves only the first one.
- C. find.limit(l) is not the same query as findOne()
- D. findOneQ returns the actual first document retrieved from a collection
正解：A
質問 # 56
In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?
- A. Put indexes on all of your documents
- B. Properly defined user roles
- C. The proper storage engine
- D. Sharding
- E. Replication
正解：E
質問 # 57
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MongoDB認定DBAアソシエイト試験（C100DBA）は、MongoDB 4.4デプロイメントを管理するスキルと知識を検証することを目的とした認定試験です。MongoDBは、世界中の多くの組織で使用されている人気のあるNoSQLデータベースです。試験はMongoDB 4.4に基づいており、セキュリティ、データモデリング、レプリケーション、シャーディング、バックアップ、およびリカバリなど、MongoDB管理に関連する幅広いトピックをカバーしています。
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プレミアム良質なMongoDB C100DBAオンライン問題集：https://drive.google.com/open?id=1SeuBe7hHFQK7xqq1xLLDo34E6Oj_T9fS