看C100DBA證照資訊參考資料 -擺脫MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)考試煩惱

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MongoDB C100DBA Exam Syllabus Topics:

SectionObjectives
Topic 1: Backup, Restore, and Operations- Restore procedures
- Monitoring and maintenance
- Backup strategies and tools
Topic 2: Data Modeling- Relationships in MongoDB
- Embedding vs referencing
- Schema design principles
Topic 3: Sharding and Scalability- Balancing and scaling operations
- Shard keys and distribution strategy
- Sharded cluster architecture
Topic 4: Indexing and Performance Tuning- Query performance optimization
- Index types and usage
- Explain plans and diagnostics
Topic 5: Replication and High Availability- Read/write concerns
- Failover and elections
- Replica set architecture
Topic 6: MongoDB CRUD Operations- Working with documents and BSON types
- Querying and filtering documents
- Insert, update, and delete operations
Topic 7: Security- Authentication and authorization
- Encryption at rest and in transit
- Role-based access control (RBAC)
Topic 8: Aggregation Framework- Data transformation and grouping
- Aggregation pipeline stages
- Aggregation operators

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最新的 MongoDB Certified DBA Associate C100DBA 免費考試真題 (Q12-Q17):

問題 #12
Suposse tou have the following collection with only 2 documents:

If you run an aggregation query and use { $unwind: "$traits" } as the first stage, how many documents will be passed to the next stage of the aggregation pipeline?

答案：D


問題 #13
Write the command(s) are correct to enable sharding on a database "testdb" and shard a collection "testCollection" with _id as shard key.

答案：

解題說明：
sh.enableSharding("testdb") & sh.shardCollection("testdb.testCollection", {_id : 1 }, true )


問題 #14
What does the following $slice query return using the following command? db.posts.find( {}, { comments: {
$slice: [ -10, 5 ] } } )

答案：B


問題 #15
What does the following aggregate query perform?

答案：A


問題 #16
Which of the following node is used during election in a replication cluster?

答案：A


問題 #17
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