C100DBAのPDF試験材料2024年最新の実際に出るC100DBA問題集 [Q35-Q56]

C100DBAのPDF試験材料2024年最新の実際に出るC100DBA問題集

更新されたのはMongoDB C100DBA問題集PDFオンラインエンジン

C100DBA試験は、MongoDB管理の専門知識を実証したい個人にとって貴重な認証です。この認定は、MongoDB管理者のスキルと知識を測定するための基準として、世界中の雇用主や組織によって認識されています。この認定は、競争の激しい雇用市場で個人が際立っているのを助けることができ、より良い雇用機会とより高い給与につながる可能性があります。

MongoDB C100DBA認定試験は、MongoDB 4.4でスキルと知識を検証したいデータベース管理者向けに設計されています。試験では、MongoDBの展開をインストール、構成、展開、保守、およびトラブルシューティングする候補者の能力を測定し、データを管理し、データベース環境を保護します。 MongoDB C100DBA認定は、MongoDBの専門知識を実証し、キャリアの機会を増やしたいデータベース管理者にとって貴重な資格です。

 

質問 # 35
In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)

• A. Limits the first five documents and then return them in reverse order
• B. Skip and limit nullify each other. Hence returning the first five documents
• C. Skips the first five documents and returns the sixth document five times
• D. Skips the first five documents and returns the next five

正解：D

質問 # 36
Which of the following is true about aggregation framework?

• A. Each aggregation operator need to return atleast one of more documents as a result
• B. the aggregate command operates on a multiple collection
• C. A single aggregation framework operator can be used more than once in a query
• D. Pipeline expressions are stateless except accumulator expressions used with $group operator

正解：A、C、D

質問 # 37
'mongoimport' command is used for

• A. Multiple command import
• B. None of the above
• C. Multiple command insertion
• D. Batch data insertion

正解：D

質問 # 38
Consider that you have a collection called population which has fields state and city. Which of the following query will calculate the population grouped by state and city?

• A. db.population.aggregate( [{ $group: { _id: { state: Estate", city: "$city" },pop: { $sum: 1 > > >] )
• B. db.population.aggregate( [{ $group: { _id: { state: Estate", city: "$city" },pop: { $sum: "$pop" } } }] )
• C. db.population.aggregate( [{ $group: { _id: { city: "$city" },pop: { $sum: "$pop" } } }] )Multi Document Transaction is not supported by MongoDB
• D. db.population.aggregate( [{ $group: { _id: { state: "$state", city: "$city" },pop: { $pop: 1 } } }] )

正解：B

質問 # 39
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.find( { tags : ["tutorial"] } );
• D. db.posts.findInArray( { tags : "tutorial" > );

正解：B

質問 # 40
Which of the following node is used during election in a replication cluster?

• A. primary
• B. arbiter
• C. secondary
• D. hidden

正解：B

質問 # 41
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": {$desc:l>});
• C. db.posts.createIndex({comments.author":-l});

正解：C

質問 # 42
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 5 comments, beginning with the first 10 items
• C. Returns 10 comments, beginning with the first
• D. Returns 10 comments, beginning with the last

正解：A

質問 # 43
What does the following query do when performed on the posts collection? db.posts.update({_id:l},{Title:This is post with ID 1"})

• A. Updates the Title of the post
• B. Updating a document is possible only with $set
• C. Syntax error
• D. Replaces the complete document with _id as 1 with the document specified in second parameter

正解：D

質問 # 44
Which of the following operators is used to updated a document partially?

• A. $project
• B. $update
• C. $set
• D. $modify

正解：C

質問 # 45
In a sharded cluster, from which node does one stop the balancer process before initiating backup?

• A. mongos node
• B. config server node
• C. Any node
• D. replicaset primary node

正解：A

質問 # 46
If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?

• A. The query returned 30000 documents after scanning the documents
• B. The query used an index to fetch the results
• C. None of the above
• D. The query returned 0 documents

正解：B

質問 # 47
When should we consider representing a one-to-many relationship in an embedded collection instead of separate collection?

• A. Always
• B. Never
• C. When the many is not very large
• D. When the many is very large

正解：C

質問 # 48
What is the maximum size of a MongoDB document

• A. 12 MB
• B. 2 MB
• C. 16 MB
• D. There is no maximum size. It depends on the RAM.

正解：C

質問 # 49
Consider that you have a collection called population which has fields state and city. Which of the following query will calculate the population grouped by state and city?

• A. db.population.aggregate( [{ $group: { _id: { state: "$state", city; "$city" },pop: { $sum: 1 > > >] )
• B. db.population.aggregate( [{ $group: { _id: { state: Estate", city: "$city" },pop: { $pop: 1 } } }] )
• C. db.population.aggregate( [{ $group: { _id: { city: "$city" },pop: { $sum: "$pop" } } }] )Multi Document Transaction is not supported by MongoDB
• D. db.population.aggregate( [{ $group: { _id: { state: Estate", city: n$city" },pop: { $sum: "$pop" } } }] )

正解：D

質問 # 50
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.

• A. db.collection.insert( { a:341})
• B. db.collection.update({b:456>, {$inc: {a:l> })
• C. db.collection.find( {a : 232} )

正解：A、B

質問 # 51
Which format/standard is used by MongoDB internally to store documents?

• A. JSON
• B. JSON - Extended
• C. B+ Trees
• D. BSON

正解：A

質問 # 52
You have designed a web application with mongoDB. You have configured replication. The replica set is in place and function properly. What happens in case of failure?

• A. Switchover needs to be done manually
• B. Failover needs to be done manually
• C. Switchover happens automatically
• D. Failover happens automatically

正解：D

質問 # 53
Which of the following operator can be used to limit the number of documents in an array field of a document after an update is performed?

• A. $push along with $each, $sort and $slice
• B. $arrayLimit
• C. $removeFromSet
• D. None of the above

正解：A

質問 # 54
Which of the following statements are true about the $match pipeline operator? Check all that apply.

• A. You should use it early as possible in the pipeline
• B. It has a sintax similar to findQ commands.
• C. It can be used as many time as needed.

正解：A、B、C

質問 # 55
Which of the following about Capped Collections is correct?

• A. High-throughput operations that insert and retrieve documents based on insertion order
• B. If the allocated space for a capped collection exceeds, it stops inserting new documents
• C. Fixed Size
• D. Only "Fixed Size" and "High-throughput operations that insert and retrieve documents based on insertion order"

正解：D

質問 # 56
......

MongoDB C100DBA 認定試験は、MongoDBデータベース管理における知識とスキルを証明するために設計された試験です。この試験は、最新バージョンのMongoDB 4.4に基づいており、インストール、設定、パフォーマンスチューニング、バックアップと復旧、セキュリティなど、データベース管理に関連するさまざまなトピックをカバーしています。この試験は、受験者のMongoDB環境でのさまざまな管理タスクを実行する能力をテストするように設計されています。

 

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