MongoDB C100DBA日常練習試験は2023年最新のに更新された123問あります
有効問題を試そう！C100DBA試験で実際の試験問題と解答
MongoDB C100DBA試験は、MongoDB管理に関連する広範なトピックをカバーする60の多肢選択問題で構成されています。試験はオンラインで実施され、世界中のどこからでも受験することができます。試験の時間は90分であり、合格スコアは65％以上でなければ認定を取得することはできません。
MongoDB C100DBA試験に合格することは、MongoDB管理の専門知識を示すことを目指す人々にとって、大きな成果です。この認定は、雇用主に認められ、個人のキャリアを前進させることができます。さらに、MongoDB認定DBAは、プライベートLinkedInグループやMongoDBイベントへの参加のような、独占的なリソースにアクセスすることができます。
質問 # 15
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" : "gomez" >
- 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" : "Pablo" , "aficion" : u
"flipar"}
正解：A、B
質問 # 16
The________operator can be used to identify an element in the array to be updated without explicitly specifying the position of the element.
- A. $
- B. Updating an array field without knowing its index is not possible.
- C. $ elemMatch
- D. $slice
正解：A
質問 # 17
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: { $pop: 1 } } }] )
- B. db.population.aggregate( [{ $group: { _id: { city: "$city" },pop: { $sum: "$pop" } } }] )Multi Document Transaction is not supported by MongoDB
- C. db.population.aggregate( [{ $group: { _id: { state: "$state", city; "$city" },pop: { $sum: 1 > > >] )
- D. db.population.aggregate( [{ $group: { _id: { state: Estate", city: n$city" },pop: { $sum: "$pop" } } }] )
正解：D
質問 # 18
'$set' sets the value of
- A. Key
- B. None of the above
- C. Name/value pair
- D. Code block
正解：A
質問 # 19
You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?
- A. A document with an _id assigned to be an Objectld
- B. No document will be inserted; an error will be raised
- C. A document that matches the collection's existing schema, but with null fields
- D. An empty document
- E. A document will be inserted with the same _id as the last document inserted
正解：A
質問 # 20
Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?
- A. To help in disaster recovery
- B. For more efficient backup operations
- C. To enable certain read preference settings
- D. To add greather redundancy
- E. To protect agains network partitions
正解：E
質問 # 21
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. $arrayLimit
- B. None of the above
- C. $push along with $each, $sort and $slice
- D. $removeFromSet
正解：C
質問 # 22
Which of the following operator can be used to control the number of items of an array that a query returns?
- A. $slice
- B. MongoDB does not support partial retrieval of items from an array
- C. $
- D. $ elemMatch
正解：A
質問 # 23
What is the output of the following program?
- A. 1s
- B. 60 s
- C. 100 s
- D. 100 ms
正解：B
質問 # 24
Which of the following does MongoDB use to provide High Scalability?
- A. Sharding
- B. Write Concern
- C. Indexing
- D. Replication
正解：A
質問 # 25
Update If Correct is an approach for which of the following concepts in MongoDB:
- A. Performance Management
- B. Transaction Management
- C. Concurrency Control
- D. Atomicity
正解：C
質問 # 26
In a replica set, a_________number of members ensures that the replica set is always able to select a primary.
- A. Depends on the application architecture
- B. 0
- C. Odd
- D. Even
正解：C
質問 # 27
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 # 28
What does the totalKeysExamined field returned by the explain method indicate?
- A. Details the completed execution of the winning plan as a tree of stages
- B. Number of documents scanned
- C. Number of index entries scanned
- D. Number of documents that match the query condition
正解：C
質問 # 29
Mongodb does provide high availability via which option?
- A. Sharding
- B. Journaling
- C. Replication
- D. Indexing
正解：C
質問 # 30
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. Switchover happens automatically
- C. Failover needs to be done manually
- D. Failover happens automatically
正解：D
質問 # 31
Which of the following statements are true about the $match pipeline operator? Check all that apply.
- A. It has a sintax similar to findQ commands.
- B. You should use it early as possible in the pipeline
- C. It can be used as many time as needed.
正解：A、B、C
質問 # 32
Which of the following is true of the mechanics of replication in MongoDB? Check all that apply.
- A. Members of a replica set may replicate data from any other data-bearing member of the set by default
- B. Clients read from the nearest member of a replica ser by default
- C. Operations on the primary are recorded in a capped collection called the oplog
正解：C
質問 # 33
To add a new user and enable authentication in MongoDB, which of the following steps need be executed?
- A. update users collection and restart mongodb with -auth option
- B. All of the above
- C. update users collection and run db.enableAuthenticationQ
- D. update users collection and restart mongodb
正解：A
質問 # 34
In what format does mongodump creates backup files?
- A. BSON
- B. XML
- C. SOAP
- D. JSON
正解：A
質問 # 35
Which of the following are valid json documents? Select all that apply.
- A. {"city":"New York", "population", 7999034, boros:{"queens", "manhattan", "staten island", "the bronx", u "brooklyn"}}
- B. {"name":"Fred Flintstone";"occupation":"Miner";"wife":"Wilma"}
- C. { }
- D. {"a":l, "b":{"b":l, "c":"foo", "d":"bar", "e":[l,2,4]}}
正解：C、D
質問 # 36
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MongoDB C100DBA認定試験は、MongoDBデータベース管理のスキルと知識を証明したい個人にとって優れた機会となっています。この認定資格は、グローバルに認められており、データベース管理の分野でのキャリア機会を向上させることができます。試験は、データベース管理に関連する幅広いトピックをカバーしており、試験に合格するには、MongoDBの概念を理解し、データベース管理の実践的な経験が必要です。
テストエンジンに練習C100DBAテスト問題：https://jp.fast2test.com/C100DBA-premium-file.html
C100DBAリアル試験問題でテストエンジン問題集トレーニングには123問あります：https://drive.google.com/open?id=1SeuBe7hHFQK7xqq1xLLDo34E6Oj_T9fS