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| Section | Objectives |
|---|---|
| Aggregation Framework | - Aggregation operators - Aggregation pipeline stages - Data transformation and grouping |
| Sharding and Scalability | - Balancing and scaling operations - Sharded cluster architecture - Shard keys and distribution strategy |
| Indexing and Performance Tuning | - Query performance optimization - Explain plans and diagnostics - Index types and usage |
| Backup, Restore, and Operations | - Restore procedures - Backup strategies and tools - Monitoring and maintenance |
| Replication and High Availability | - Replica set architecture - Read/write concerns - Failover and elections |
| Data Modeling | - Embedding vs referencing - Relationships in MongoDB - Schema design principles |
| Security | - Encryption at rest and in transit - Role-based access control (RBAC) - Authentication and authorization |
| MongoDB CRUD Operations | - Working with documents and BSON types - Querying and filtering documents - Insert, update, and delete operations |
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NEW QUESTION # 56
In a sharded replicas set environment with multiple mongos servers, which of the following would decide the mongos failover?
Answer: B
NEW QUESTION # 57
What read preference should your application use if you want to read from the primary under normal circumstances but allow reads from secondaries when a primary is unavailable?
Answer: D
NEW QUESTION # 58
Which of the following are common uses of the mongo shell? Check all that apply
Answer: A,C
NEW QUESTION # 59
Consider the following document from the products collection:
What does the following query using $elemMatch return? db.products.find( { product_code: "345678" }, { variations: { $elemMatch: { size:
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