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MongoDB C100DBA Exam Syllabus Topics:

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

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q87-Q92):

NEW QUESTION # 87
Which format/standard is used by MongoDB internally to store documents?

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

Answer: A

NEW QUESTION # 88
You are in a sharded cluster. What will you do prior to initiating backup in sharded cluster?

A. db.stopserver()
B. sh.stopserverQ
C. db.stopBalancer()
D. sh.stopBalancer()

Answer: D

NEW QUESTION # 89
MongoDB is a schema-less design.

A. True
B. False

Answer: A

NEW QUESTION # 90
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?

A. db.posts.createIndex({comments.$.author " : {$desc:l > });
B. db.posts.createIndex({comments.author " :-l});
C. db.posts.createIndex({commerits.$.author " :-l});

Answer: B

NEW QUESTION # 91
What mongosh command connects to node-1.cluster1.mycompany.local on port 27017?

A. mongosh --hostname " node-1.cluster1.mycompany.local:27017 "
B. mongosh " node-1.cluster1.mycompany.local & port=27017 "
C. mongosh --connect " node-1.cluster1.mycompany.local:27017 "
D. mongosh " node-1.cluster1.mycompany.local:27017 "

Answer: D

Explanation:
mongosh accepts a MongoDB host address in hostname:port form, so mongosh " node-1.cluster1.mycompany.
local:27017 " is the valid choice among the commands shown. A canonical URI form such as mongosh " mongodb://node-1.cluster1.mycompany.local:27017 " is also valid, and the connection can alternatively be expressed using --host together with --port. Option A uses an unsupported --hostname switch rather than the documented --host option. Option B invents a --connect flag that is not the standard mongosh interface.
Option C constructs an invalid string using an ampersand-style parameter rather than a MongoDB URI or a normal host:port target. Port 27017 is MongoDB ' s default server port, so it could often be omitted if the deployment uses the default, but explicitly including it is valid and removes ambiguity. In authenticated or TLS-enabled environments, the DBA would also supply credentials, authentication database, certificate settings, or a connection string carrying those parameters. For the simple host-and-port requirement in the question, option D is correct.
Study Guide reference/topic:Security, Networking, and Encryption - mongosh connectivity, host/port addressing, and connection options.

NEW QUESTION # 92
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