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| Section | Weight | Objectives |
|---|---|---|
| Monitoring, Performance and Troubleshooting | 10% | - Monitoring tools and metrics - Diagnostics and resolving common issues - Performance tuning and optimization |
| Security and Access Control | 15% | - Encryption, auditing, and security best practices - Role-based access control - Authentication mechanisms |
| Sharding and Scalability | 10% | - Sharded cluster architecture - Query routing and cluster operations - Shard keys, chunk management, balancing |
| Backup, Recovery and Maintenance | 10% | - Data consistency and integrity checks - Logical and physical backup methods - Restore procedures and disaster recovery |
| CRUD Operations and Indexing | 20% | - Create, Read, Update, Delete operations - Query optimization and aggregation - Index types, creation, and management |
| Replication and High Availability | 15% | - Failover, elections, read/write concern - Replica set architecture and components - Deployment and maintenance of replica sets |
| MongoDB Architecture and Deployment | 20% | - Installation and configuration - Core concepts, JSON/BSON, data model - Storage engines and server management |
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NEW QUESTION # 150
What does the following $slice query return using the following command? db.posts.find( {}, { comments: { $slice: [ -10, 5 ] } } )
Answer: D
NEW QUESTION # 151
Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?
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