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MongoDB C100DBA Exam Syllabus Topics:

Section	Weight	Objectives
Security and Access Control	15%	- Encryption, auditing, and security best practices - Role-based access control - Authentication mechanisms
CRUD Operations and Indexing	20%	- Index types, creation, and management - Query optimization and aggregation - Create, Read, Update, Delete operations
Sharding and Scalability	10%	- Query routing and cluster operations - Shard keys, chunk management, balancing - Sharded cluster architecture
Replication and High Availability	15%	- Deployment and maintenance of replica sets - Replica set architecture and components - Failover, elections, read/write concern
MongoDB Architecture and Deployment	20%	- Installation and configuration - Core concepts, JSON/BSON, data model - Storage engines and server management
Backup, Recovery and Maintenance	10%	- Data consistency and integrity checks - Logical and physical backup methods - Restore procedures and disaster recovery
Monitoring, Performance and Troubleshooting	10%	- Diagnostics and resolving common issues - Monitoring tools and metrics - Performance tuning and optimization

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q11-Q16):

NEW QUESTION # 11
What is the first task that a secondary would perform on being prompted by another secondary for an election?

A. Vote for itself and then call for election
B. Connect to primary to confirm its availability
C. Vote for the first secondary so that it would become the next primary
D. Start the election process for primary

Answer: B

NEW QUESTION # 12
What does the following aggregate query perform?

A. Groups the posts by number of likes (101, 102, 103.) by adding 1 every time
B. Fetches the posts with likes between 100 and 200, sets the _id of the first document as null and then increments it 1 every time
C. Fetches the posts with likes between 100 and 200 and sets their _id as null
D. Calculates the number of posts with likes between 100 and 200

Answer: D

NEW QUESTION # 13
The oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. All the replica set members contain a copy of the oplog in the following collection:

A. oplog.rs
B. <replicasetid>.oplog.rs
C. local.oplog.rs
D. <database>..oplog.rs

Answer: C

NEW QUESTION # 14
Aggregation Pipelines have a limit of:

A. 2 MB document and no limit on RAM
B. 16 MB document and 100 MB RAM
C. No limit on document and 100 MB RAM
D. 2 MB document and 100 MB RAM

Answer: B

NEW QUESTION # 15
By default, the MongoDB cursor in mongo shell is configured to return how many documents? To get the next set of documents, which command is used?

A. 20, it
B. 200, more
C. No limit, none
D. 50, it

Answer: A

NEW QUESTION # 16
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