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| Section | Objectives |
|---|---|
| Aggregation Framework | - Aggregation pipeline stages - Aggregation operators - Data transformation and grouping |
| Data Modeling | - Schema design principles - Relationships in MongoDB - Embedding vs referencing |
| Indexing and Performance Tuning | - Index types and usage - Explain plans and diagnostics - Query performance optimization |
| Sharding and Scalability | - Shard keys and distribution strategy - Balancing and scaling operations - Sharded cluster architecture |
| Security | - Encryption at rest and in transit - Role-based access control (RBAC) - Authentication and authorization |
| Replication and High Availability | - Replica set architecture - Failover and elections - Read/write concerns |
| Backup, Restore, and Operations | - Monitoring and maintenance - Backup strategies and tools - Restore procedures |
| MongoDB CRUD Operations | - Working with documents and BSON types - Insert, update, and delete operations - Querying and filtering documents |
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NEW QUESTION # 21
Which of the following statements are true about the $match pipeline operator? Check all that apply.
Answer: A,B,C
NEW QUESTION # 22
Consider the following example document:
{
"_id": Objectld("5360c0a0a655a60674680bbe"),
"user"
"login": "irOn"
"description": "Made of steel"
"date": ISODate("2014-04-30T09:16:45.836Z"),
}
>
and index creation command:
db.users.createlndex( { "user.login": 1, "user.date": -1 }, "mylndex" )
When performing the following query:
db.users.find( { "user.login": /Air.*/ }, { "user":1, "_id":0 } ).sort( { "user.date":1 } )
which of the following statements correctly describe how MongoDB will handle the query? Check all that apply.
Answer: E
NEW QUESTION # 23
Which of the following aggregation commands in MongoDB does not support sharded collections?
Answer: B
NEW QUESTION # 24
You have a replicated cluster with 1 primary, 3 secondary, 1 arbiter. One of the secondary is hidden. What is the replication factor of this replicated cluster?
Answer: B
NEW QUESTION # 25
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?
Answer: A
NEW QUESTION # 26
......
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