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MongoDB C100DBA Exam Syllabus Topics:

Section	Objectives
Topic 1: Sharding	- Cluster Scaling 1. Chunk Distribution 2. Balancer Operations 3. Shard Keys 4. Query Routing
Topic 2: Server Administration	- Database Operations 1. Backup and Restore 2. Configuration Management 3. Monitoring 4. Storage Management
Topic 3: CRUD Operations	- Data Manipulation 1. Update Operations 2. Insert Operations 3. Read Queries 4. Delete Operations
Topic 4: Replication	- Replica Sets 1. Write Concerns 2. Primary and Secondary Nodes 3. Read Preferences 4. Elections
Topic 5: Application Administration	- Security and Access Control 1. Role-Based Access Control 2. Authentication 3. Authorization 4. User Management
Topic 6: Indexes	- Index Management 1. Query Performance Optimization 2. Single Field Indexes 3. Compound Indexes 4. Index Selection
Topic 7: Philosophy and Features	- MongoDB Architecture 1. Scalability Concepts 2. Document Model 3. High Availability Concepts 4. Collections and Databases

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q94-Q99):

NEW QUESTION # 94
To add a new user and enable authentication in MongoDB, which of the following steps need be executed?

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

Answer: C

NEW QUESTION # 95
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" :: 2, "a": 2, "c" :: 0, "b": 1}
B. { ''\Jd" :9, "a": 17, "c": 1, "b": 1}
C. {".Jd" :6, "a": 1, "c" :1, "b" :5}
D. {".Jd" :: 5, "a": 3, "c" :: 0, "b": 12}
E. {".Jd" :: 8, "a": 11, "c": 1, "b": 0}
F. {''__id" :3, "a": 4, "c" :0, "b" :14}
G. {".Jd" :: 1, "a": 0, "c" :: 0, "b": 2}
H. {''_Jd" :7, "a": 8, "c" :1, "b" :7}
I. {".Jd" :: 4, "a": 5, "c" :: 0, "b": 17}
J. { \Jd" :10,"a": 3, "c": 1, "b": 1}

Answer: A,B,D,E,J

NEW QUESTION # 96
MongoDB is a schema-less design.

A. False
B. True

Answer: B

NEW QUESTION # 97
Which of the following commands finds all the documents in the posts collection with post timestamp field as null?

A. db.posts.find( { post_timestamp: { $fieldtype: null } } )
B. db.posts.find( { post_timestamp: { $fieldtype: 10 } } )
C. db.posts.find( { post_timestamp: { $type: null } } )
D. db.posts.find( { post_timestamp : { $type; 10 > > )

Answer: C

NEW QUESTION # 98
In what format does mongodump creates backup files?

A. SOAP
B. JSON
C. XML
D. BSON

Answer: D

NEW QUESTION # 99
......

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