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MongoDB C100DBA認証試験の準備をするには、候補者は、機能、コンポーネント、アーキテクチャを含むMongoDB 4.4を十分に理解する必要があります。また、バックアップやリカバリ、パフォーマンスチューニング、セキュリティ管理などのデータベース管理タスクに精通する必要があります。 MongoDBは、オンラインコース、学習ガイド、練習試験など、候補者が試験の準備を支援するためのいくつかのリソースを提供しています。 MongoDB C100DBA認定試験に合格することにより、候補者はMongoDBデータベース管理に習熟度を示し、データベースの専門家としての信頼性を高めることができます。
関連する認定を取得し、自分自身を向上させるためにC100DBA試験の準備をしようとするなら、あなたは非常に幸運に違いありません。すべての関係者の共同の努力により、当社は非常に便利で有用なC100DBA学習教材を設計しました。さらに重要なことは、当社の学習教材が多くの人々が目標を達成し、関連する認証を取得するのに役立っていることを実践が証明していることです。当社のC100DBA学習教材は、C100DBA試験に合格し、関連する認定を取得することを切望している人々に最適な学習ツールです。
MongoDBは、様々な産業で使用されている人気の高いオープンソースのNoSQLデータベース管理システムです。MongoDBの人気の高まりに伴い、MongoDBデータベースを効果的に管理するスキルを持った専門家の需要が増しています。MongoDB C100DBA（MongoDB認定DBAアソシエイト試験）は、個人のMongoDBデータベース管理能力を検証する認定試験です。
質問 # 52
Which TWO commands can be used to remove the role, " specialRole " from " user1 " ?
正解：B、D
解説：
The documented mongosh helper is db.revokeRolesFromUser(), and its second argument is an array of roles to revoke. MongoDB permits each role in that array to be expressed either as an explicit document { role: < roleName > , db: < database > } or, when the role belongs to the database in which the command is run, as a simple role-name string. Option C uses the explicit role-document form and is therefore valid for a role named specialRole defined in myDB. Option E uses the shorthand string form and is valid when specialRole is in the current database context. Option A reverses the required document structure and does not supply the mandatory role and db keys. Options B and D use a singular helper, db.revokeRoleFromUser(), which is not the documented MongoDB method. The plural method name reflects that multiple roles can be revoked in a single operation. Administrators should also remember that revoking a directly assigned role does not necessarily remove privileges inherited through other roles. Among the choices, C and E are the syntactically valid revocation forms.
Study Guide reference/topic:Security, Networking, and Encryption - RBAC, user administration, and revokeRolesFromUser().
質問 # 53
In a sharded cluster, from which node does one stop the balancer process before initiating backup?
正解：A
質問 # 54
What does the totalKeysExamined field returned by the explain method indicate?
正解：B
質問 # 55
What " stage " indicates that no indexes were available for a query pattern?
正解：B
解説：
In MongoDB explain output, a COLLSCAN stage means the winning plan is scanning documents in the collection rather than traversing a suitable index. This is the clearest indicator that the query is not being serviced by a normal index scan for the relevant predicate. By contrast, IXSCAN explicitly indicates an index scan and typically includes details such as the index key pattern, direction, and bounds. A FETCH stage represents retrieval of full documents, often after an index has already identified candidate record locations; its presence does not imply that no index was used. GROUP relates to grouping behavior and is not the stage used to identify missing index support. A collection scan is not automatically wrong: for tiny collections or queries that return most documents, it can be efficient. However, on large collections with selective predicates, repeated COLLSCAN plans are a strong signal that the DBA should evaluate indexing.
Administrators should compare totalDocsExamined, totalKeysExamined, execution time, and the winning
/rejected plans before deciding to add an index. For the terminology tested by the question, COLLSCAN is the correct stage, so C is correct.
Study Guide reference/topic:Indexing and Query Optimization - explain plans, COLLSCAN, IXSCAN, and missing index diagnostics.
質問 # 56
A MongoDB administrator needs to create a new role with only the read privileges for the products database.
What command should the administrator use?
正解：C
解説：
MongoDB custom roles are defined in terms of privileges, and each privilege specifies a resource plus one or more allowed actions. For read/query access, find is a valid privilege action. To represent all normal collections in a specified database, MongoDB uses a resource document with the target database and an empty collection name, for example { db: " products " , collection: " " }. Option B therefore combines the correct resource scope with the find action and does not grant write capability. The distractors confuse built-in role names with privilege actions. read, readWrite, and readAnyDatabase are built-in roles or role concepts, not the appropriate action values for the privileges[].actions list shown here. Likewise, a literal " * " collection value is not the documented database-wide resource form for this custom privilege. In practice, an administrator could also assign MongoDB ' s built-in read role rather than creating a custom role if its permissions exactly match the requirement. Given the specific createRole() choices, however, option B is the technically correct construction.
Study Guide reference/topic:Security, Networking, and Encryption - RBAC, custom roles, resources, and privilege actions.
質問 # 57
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2026年Fast2testの最新C100DBA PDFダンプおよびC100DBA試験エンジンの無料共有：https://drive.google.com/open?id=1SeuBe7hHFQK7xqq1xLLDo34E6Oj_T9fS