Test C100DBA Practice | C100DBA New Practice Materials

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MongoDB C100DBA Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Backup, Recovery and Maintenance	10%	- Data consistency and integrity checks - Logical and physical backup methods - Restore procedures and disaster recovery
Topic 2: CRUD Operations and Indexing	20%	- Index types, creation, and management - Create, Read, Update, Delete operations - Query optimization and aggregation
Topic 3: Security and Access Control	15%	- Role-based access control - Encryption, auditing, and security best practices - Authentication mechanisms
Topic 4: Monitoring, Performance and Troubleshooting	10%	- Monitoring tools and metrics - Diagnostics and resolving common issues - Performance tuning and optimization
Topic 5: MongoDB Architecture and Deployment	20%	- Storage engines and server management - Installation and configuration - Core concepts, JSON/BSON, data model
Topic 6: Replication and High Availability	15%	- Replica set architecture and components - Failover, elections, read/write concern - Deployment and maintenance of replica sets
Topic 7: Sharding and Scalability	10%	- Query routing and cluster operations - Shard keys, chunk management, balancing - Sharded cluster architecture

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q16-Q21):

NEW QUESTION # 16
What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them hidden.
The set also has an arbiter?

A. 0
B. 1
C. 2
D. None of the above

Answer: C

NEW QUESTION # 17
Which of the documents below will be retrieved by the following query? Assume the documents are stored in a collection called "sample". Check all that apply.
db.sample.find( { "$or" : [ { "a" : { "$in" : [ 3, 10] > }, { "b" : { "$lt" : 2 > > ] > )

A. {".Jd" :6, "a": 1, "c" :1, "b" :5}
B. {''__id" :3, "a": 4, "c" :0, "b" :14}
C. { \Jd" :10,"a": 3, "c": 1, "b": 1}
D. {".Jd" :: 1, "a": 0, "c" :: 0, "b": 2}
E. {".Jd" :: 8, "a": 11, "c": 1, "b": 0}
F. {".Jd" :: 5, "a": 3, "c" :: 0, "b": 12}
G. { ''\Jd" :9, "a": 17, "c": 1, "b": 1}
H. {''_Jd" :7, "a": 8, "c" :1, "b" :7}
I. {".Jd" :: 4, "a": 5, "c" :: 0, "b": 17}
J. {".Jd" :: 2, "a": 2, "c" :: 0, "b": 1}

Answer: C,E,F,G,J

NEW QUESTION # 18
Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc.
Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

A. db.posts.findOne({post_text: 1})
B. db.posts.find({},{_id:Of post_text:1})
C. db.posts.finOne({},{post_text:1})
D. db.posts.finOne({},{_id:0, post_text:1})

Answer: D

NEW QUESTION # 19
To add a new user and enable authentication in MongoDB, which of the following steps need be executed?

A. update users collection and restart mongodb
B. update users collection and run db.enableAuthenticationQ
C. update users collection and restart mongodb with -auth option
D. All of the above

Answer: C

NEW QUESTION # 20
Update If Correct is an approach for which of the following concepts in MongoDB:

A. Performance Management
B. Transaction Management
C. Concurrency Control
D. Atomicity

Answer: C

NEW QUESTION # 21
......

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