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MongoDB C100DBA Exam Syllabus Topics:

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

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q138-Q143):

NEW QUESTION # 138
Which of the following about Capped Collections is correct?

A. If the allocated space for a capped collection exceeds, it stops inserting new documents
B. Fixed Size
C. High-throughput operations that insert and retrieve documents based on insertion order
D. Only "Fixed Size" and "High-throughput operations that insert and retrieve documents based on insertion order"

Answer: D

NEW QUESTION # 139
Below is a sample document of "orders" collection

A. $sort

Answer: A

NEW QUESTION # 140
Which of the following aggregation commands in MongoDB does not support sharded collections?

A. group
B. mapReduce
C. aggregate
D. All of the above

Answer: A

NEW QUESTION # 141
Which format/standard is used by MongoDB internally to store documents?

A. JSON - Extended
B. B+ Trees
C. JSON
D. BSON

Answer: C

NEW QUESTION # 142
A MongoDB administrator needs to create a new role with only the read privileges for the products database.
What command should the administrator use?

A. db.createRole({ role: " productRead " , privileges: [ { resource: { db: " products " , collection: " * " }, actions: [ " readWrite " ] } ] , roles: [] }, { w: " majority " , wtimeout: 5000 })
B. db.createRole({ role: " productRead " , privileges: [ { resource: { db: " products " , collection: " " }, actions: [ " find " ] } ] , roles: [] }, { w: " majority " , wtimeout: 5000 })
C. db.createRole({ role: " productRead " , privileges: [ { resource: { db: " products " , collection: " * " }, actions: [ " read " ] } ] , roles: [] }, { w: " majority " , wtimeout: 5000 })
D. db.createRole({ role: " productRead " , privileges: [ { resource: { db: " products " , collection: " * " }, actions: [ " readAnyDatabase " ] } ] , roles: [] }, { w: " majority " , wtimeout: 5000 })

Answer: B

Explanation:
MongoDB custom roles are defined in terms of privileges, and each privilege specifies a resource plus one or more allowed actions. For read/query access, find is a valid privilege action. To represent all normal collections in a specified database, MongoDB uses a resource document with the target database and an empty collection name, for example { db: " products " , collection: " " }. Option B therefore combines the correct resource scope with the find action and does not grant write capability. The distractors confuse built-in role names with privilege actions. read, readWrite, and readAnyDatabase are built-in roles or role concepts, not the appropriate action values for the privileges[].actions list shown here. Likewise, a literal " * " collection value is not the documented database-wide resource form for this custom privilege. In practice, an administrator could also assign MongoDB ' s built-in read role rather than creating a custom role if its permissions exactly match the requirement. Given the specific createRole() choices, however, option B is the technically correct construction.
Study Guide reference/topic:Security, Networking, and Encryption - RBAC, custom roles, resources, and privilege actions.

NEW QUESTION # 143
......

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100% Pass Quiz C100DBA - MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)–High-quality Verified Answers

MongoDB C100DBA Exam Syllabus Topics:

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q138-Q143):