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MongoDB C100DBA Exam Syllabus Topics:

Section	Objectives
Topic 1: Security	- Role-based access control (RBAC) - Authentication and authorization - Encryption at rest and in transit
Topic 2: Data Modeling	- Embedding vs referencing - Relationships in MongoDB - Schema design principles
Topic 3: Aggregation Framework	- Data transformation and grouping - Aggregation operators - Aggregation pipeline stages
Topic 4: MongoDB CRUD Operations	- Working with documents and BSON types - Insert, update, and delete operations - Querying and filtering documents
Topic 5: Replication and High Availability	- Failover and elections - Replica set architecture - Read/write concerns
Topic 6: Indexing and Performance Tuning	- Query performance optimization - Explain plans and diagnostics - Index types and usage
Topic 7: Sharding and Scalability	- Sharded cluster architecture - Balancing and scaling operations - Shard keys and distribution strategy
Topic 8: Backup, Restore, and Operations	- Monitoring and maintenance - Backup strategies and tools - Restore procedures

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q157-Q162):

NEW QUESTION # 157
The following aggregation option is used to specify the specific fields that needs to be passed to the next stage of the aggregation pipeline:

A. $group
B. $project
C. $match
D. $aggregate

Answer: B

NEW QUESTION # 158
You perform the following query on the sayings collection, which has the index
{ quote : "text" }:
Assuming the documents below are in the collection, which ones will the following query return? Check all that apply.
db.sayings.find( { $text : { $search : "fact find" } } )

A. { _id : 1, quote : "That's a fact, Jack." }
B. { _id : 3, quote : "Nobody will ever catch me." }
C. { _id : 2, quote : "Find out if that fact is correct." }

Answer: A,C

NEW QUESTION # 159
Which of the following operator can be used to control the number of items of an array that a query returns?

A. MongoDB does not support partial retrieval of items from an array
B. $slice
C. $
D. $ elemMatch

Answer: B

NEW QUESTION # 160
Consider that our posts collection contains an array field called tags that contains tags that the user enters. {

Which of the following commands will find all the posts that have been tagged as tutorial.

A. db.posts.find( { tags : "tutorial" } );
B. db.posts.find( { $array : {tags: "tutorial") > );
C. db.posts.find( { tags : ["tutorial"] } );
D. db.posts.findInArray( { tags : "tutorial" > );

Answer: A

NEW QUESTION # 161
What is the output of following two commands in MongoDB: db. posts. insert({n_id " :l}) db.posts.insert({ "
_id " :l})

A. This will throw a duplicate key error
B. It will insert two documents and throw a warning to the user
C. Two documents will be inserted with _id as 1
D. MongoDB will automatically increment the _id of the second document as 2

Answer: A

NEW QUESTION # 162
......

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