最新のC100DBA学習ガイド2023年最新の- 提供するのはテストエンジンとPDF [Q11-Q36]

最新のC100DBA学習ガイド2023年最新の- 提供するのはテストエンジンとPDF

最新版を今すぐ試そうC100DBA練習テスト問題解答が待ってます

MongoDB C100DBA試験は、MongoDBのデータベース管理者として働く個人のスキルと知識をテストするために設計されています。この試験は、MongoDBの最新バージョンであるバージョン4.4に基づいています。試験は、MongoDBの経験があり、データベース管理者として認定されたい専門家を対象としています。

MongoDB C100DBA試験の準備には、MongoDBアーキテクチャと管理の堅実な理解が必要です。候補者は、MongoDBの公式トレーニングコースを受講し、MongoDBのドキュメントを読み、実際のMongoDB展開でスキルを練習することで、試験の準備ができます。MongoDB C100DBA試験に合格することは、MongoDBを扱うデータベース管理者にとって貴重な業績であり、新しいキャリアの機会を開くことができます。

質問 # 11
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. <replicasetid>.oplog.rs
B. <database>..oplog.rs
C. local.oplog.rs
D. oplog.rs

正解：C

質問 # 12
Which option can be used with update command so that a new document gets created if no matching document is found based on the query condition?

A. {update: true, insert: true} as the third parameter of update command
B. Specify {upsert : true } as the third parameter of update command
C. upsert command instead of update command
D. This has to be handled in application code (Node.js, PHP, JAVA, C#, etc.) and cannot be handled in mongo shell query

正解：B

質問 # 13
In mongodb how do you update a document partially?

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

正解：A

質問 # 14
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 # 15
What does the totalKeysExamined field returned by the explain method indicate?

A. Number of documents that match the query condition
B. Details the completed execution of the winning plan as a tree of stages
C. Number of index entries scanned
D. Number of documents scanned

正解：C

質問 # 16
You have the following index on the toys collection:
{
"manufacturer" : 1,
"name" : 1,
"date" : -1
}
Which of the following is able to use the index for the query? Check all that apply.

A. db.toys.find( { name : "Big Rig Truck", date : "2013-02-01", manufacturer : "Tanko"
B. db.toys.find( { date : "2015-03-01", manufacturer : "Loggo", name : "Brick Set" } )
C. db.toys.find( { manufacturer : "Matteo", name : "Barbara", date : "2014-07-02" } )

正解：A、B、C

質問 # 17
Which of the following is true about sharding?

A. Creating a sharded key automatically creates an index on the collection using that key
B. We cannot change a shard key directly/automatically once it is set up
C. Sharding is enabled at the database level
D. A sharded environment does not support sorting functionality since the documents lie on various mongod instances

正解：B

質問 # 18
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. {"a":l, "b":{"b":l, "c":"foo", "d":"bar", "e":[l,2,4]}}
C. { }
D. {"name":"Fred Flintstone";"occupation":"Miner";"wife":"Wilma"}

正解：B、C

質問 # 19
What is the output of the following program?

A. 100 s
B. 1s
C. 60 s
D. 100 ms

正解：C

質問 # 20
You perform the following query on the sayings collection, which has the index
{ quote : "text" }:
Assuming the documents below are in the collection, which ones will the following query return? Check all that apply.
db.sayings.find( { $text : { $search : "fact find" } } )

A. { _id : 1, quote : "That's a fact, Jack." }
B. { _id : 3, quote : "Nobody will ever catch me." }
C. { _id : 2, quote : "Find out if that fact is correct." }

正解：A、C

質問 # 21
Consider the following example document from the sample collection. All documents in this collection have the same schema.

Which of the following queries will replace this with the document.

A. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 , { "$unset" : [ "a" , "b" ] } } )
B. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > , { "justOne" : true > ) / This operation cannot be done with a single query.
C. db.sample.update( { "_id" : 3 } , { "$set" : { "_id" : 7 , "c" : 4 > > )
D. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > )

正解：A

質問 # 22
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 # 23
Consider the following document:
> db.c.find()
{ "_id" : 12, b : [ 3, 5, 7, 2, 1, -4, 3, 12 ] }
Which of the following queries on the "c" collection will return only the first five elements of the array in the
"b"
field? E.g.,
Document you want returned by your query:
{ "_id" : 12, "b" : [ 3, 5, 7, 2, 1 ] >

A. db.c.find( { > , { b : { $slice : [ 0 , 5 ] } } )
B. db.c.find( { > , { b : { $substr[ 0 , 5 ] > > )
C. db.c.find( { b : [ 0 , 5 ] > )
D. db.c.find( { > , { b : [ 0, 1, 2, 3, 4, 5 ] > )
E. db.c.find( { > , { b : [ 0 , 5 ] > )

正解：A

質問 # 24
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 : { $gte : 100, $lt : 200 } } );
B. db.posts.find({ likes : { $gt : 100 , $lte : 200 } } );
C. db.posts.find({ likes : { $gte : 100 , $lte : 200 } } );
D. db.posts.find({ likes : { $gt : 100, $lt : 200 > > );

正解：C

質問 # 25
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. $match
B. $aggregate
C. $project
D. $group

正解：C

質問 # 26
Which mongodb tool is used to report details on number of database operations in MongoDB?

A. mongotop
B. mongodump
C. mongostat
D. mongorestore

正解：C

質問 # 27
If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?

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

正解：A

質問 # 28
What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them hidden.
The set also has an arbiter?

A. 0
B. None of the above
C. 1
D. 2

正解：A

質問 # 29
Which of the following aggregation commands in MongoDB does not support sharded collections?

A. aggregate
B. All of the above
C. mapReduce
D. group

正解：D

質問 # 30
Which are the ONLY ways to project portions of an array?

A. $ elemMatch
B. All of the above
C. $slice
D. $

正解：B

質問 # 31
Which of the following command inside aggregate command is used in MongoDB aggregation to filter the documents to pass only the documents that match the specified condition(s) to the next pipeline stage.

A. $sum
B. $aggregate
C. $match
D. $group

正解：C

質問 # 32
Which of the tags in a replica set configuration specify the operations to be read from the node with the least network latency?

A. netLatency
B. secondaryPreferred
C. primaryPreferred
D. nearest

正解：D

質問 # 33
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 next five
B. Limits the first five documents and then return them in reverse order
C. Skip and limit nullify each other. Hence returning the first five documents
D. Skips the first five documents and returns the sixth document five times

正解：A

質問 # 34
You have a replicated cluster with 1 primary, 3 secondary, 1 arbiter. One of the secondary is hidden. What is the replication factor of this replicated cluster?

A. 04
B. 0
C. 06
D. 03

正解：A

質問 # 35
Consider that the posts collection contains an array called ratings which contains ratings given to the post by various users in the following format:

Which of the following query will return all the documents where the ratings array contains elements that in some combination satisfy the query conditions?