最新C100DBA合格保証試験問題集には正確で最新な問題があります
C100DBA試験ブレーン問題集で学習注釈と理論
MongoDB C100DBA 認定試験は、世界中どこからでも受験できるオンライン監視試験です。90分以内に60問の多肢選択問題に回答する必要があります。試験に合格するためには、候補者は少なくとも65％のスコアを取得する必要があります。試験料は150米ドルであり、候補者が最初の試みで合格しなかった場合、1回の無料リテイクが含まれています。
C100DBA認定を取得することは、専門家がMongoDBデータベース管理の専門知識を実証する素晴らしい方法です。また、フィールドでのキャリアを前進させようとしている人にとっても貴重な資格です。雇用主はしばしば、業界で認識された認定を受けている候補者を探します。C100DBA認定は、混雑した雇用市場で専門家が際立っているのを助けることができます。
質問 # 23
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. oplog.rs
- C. <database>..oplog.rs
- D. local.oplog.rs
正解：D
質問 # 24
What is the output of the following program?
- A. 60 s
- B. 100 ms
- C. 1s
- D. 100 s
正解：A
質問 # 25
We can insert multiple documents in bulk using which of the following operations:
- A. initializeUnorderedBulkOp
- B. initializeUnorderedBulk
- C. initializeBulkOp
- D. initializeBulk
正解：A
質問 # 26
Given a replica set with five data-bearing members, suppose the primary goes down with operations in its oplog that have been copied from the primary to only one secondary. Assuming no other problems occur, which of the following describes what is most likely to happen?
- A. reads will be stale until the primary comes back up
- B. the most current secondary will roll back the operations following the election
- C. the primary may roll back the operations once it recovers
- D. the secondary with the most current oplog will be elected primary
- E. missing operations will need to be manually re-performed
正解：D
質問 # 27
What is the defau size of a GridFS chunk?
- A. 16 MB
- B. 1 MB
- C. 2 MB
- D. 255 K
正解：D
質問 # 28
Below is a sample document of "orders" collection
正解：
解説：
$sort
質問 # 29
Which of the following command is used to get all the indexes on a collection?
- A. db.collection.getlndexesQ
- B. db.collection.showIndexes()
- C. db.collection.findlndexes()
- D. db.showIndexes()
正解：A
質問 # 30
Which command can be used to rebuild the indexes on a collection in MongoDB?
- A. db.collection.createIndex({author:l}).reIndex()
- B. db.collection.relndexQ
- C. db.collection.createlndex({relndex:l})
- D. db.collection.reIndex({author:l})
正解：B
質問 # 31
Which of the following commands can cause the database to be locked?
- A. Issuing a query
- B. Map-reduce
- C. All of the above
- D. Inserting data
正解：C
質問 # 32
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( { tags : ["tutorial"] } );
- B. db.posts.find( { $array : {tags: "tutorial") > );
- C. db.posts.findInArray( { tags : "tutorial" > );
- D. db.posts.find( { tags : "tutorial" } );
正解：D
質問 # 33
If you have created a compound index on (A,B, C) which of the following access pattern will not be able to utilize the index?
- A. B, C
- B. A, B
- C. A
- D. A, B, C
正解：A
質問 # 34
Dada una coleccion, cuales devuelve con la siguiente query
db.coleccion.find({nombre:"ruben",apellido:"gomez"},{nombre:l,apellido:l,aficion:l});
- A. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "ruben", "apellido" : "Pablo" , "aficion" : u
"flipar"} - B. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "ruben", "apellido" : "gomez" >
- C. { "_id" : Objectld("580a42acdfblb5al7427d301"), "nombre" : "Luis", "apellido" : "gomez", "aficion" : u
"flipar" } - D. { "-id" : Objectld("580a42b5dfblb5al7427d302"), "nombre" : "ruben", "apellido" : "gomez", "aficion" :
v u "flipar" }
正解：B、D
質問 # 35
Consider the following example document from the sample collection. All documents in this collection have the same schema.
Which of the following queries will replace this with the document.
- A. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 , { "$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 # 36
Mongodb does provide high availability via which option?
- A. Journaling
- B. Sharding
- C. Indexing
- D. Replication
正解：D
質問 # 37
A collection and a document in MongoDB is equivalent to which of the SQL concepts respectively?
- A. Column and Row
- B. Table and Row
- C. Database and Table
- D. Table and Column
正解：B
質問 # 38
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 : 3, quote : "Nobody will ever catch me." }
- B. { _id : 1, quote : "That's a fact, Jack." }
- C. { _id : 2, quote : "Find out if that fact is correct." }
正解：B、C
質問 # 39
MongoDB is
- A. Document-oriented DBMS
- B. None of the above
- C. Relational DBMS
- D. Object-oriented DBMS
正解：A
質問 # 40
What is the equivalent command in MongoDB for the following SQL query?
SELECT * FROM posts WHERE author like "%john%"
- A. db.posts.find( { $like: {author: /John/} } )
- B. db.posts.find( { author: {$like: /John/} } )
- C. db.posts.find( { author: /AjohnA/ > )
- D. db.posts.find( { author: /John/ } )
正解：D
質問 # 41
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