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MongoDB C100DBA Exam Syllabus Topics:

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

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q132-Q137):

NEW QUESTION # 132
Which option should be used to update all the documents with the specified condition in the MongoDB query?

A. specify {updateAII: true} as the third parameter of update command
B. updateAII instead of update
C. specify {all: true} as the third parameter of update command
D. specify {multi : true} as the third parameter of update command

Answer: D

NEW QUESTION # 133
Which of the following is a valid insert statement in mongodb? Select all valid.

A. db.test.insert({x:2,y:"apple"})
B. db.test.insert{"x":2, "y":"apple"})
C. db.test.insert({x:2},{y:"apple"})
D. db.test.push({x:2,y:"apple"})

Answer: A,B

NEW QUESTION # 134
Consider the following example document from the sample collection. All documents in this collection have the same schema.
Which of the following queries will replace this with the document.

A. db.sample.update( { " _id " : 3 > , { " _id " : 7 , " c " : 4 > )
B. db.sample.update( { " _id " : 3 > , { " _id " : 7 , " c " : 4 > , { " justOne " : true > ) / # This operation cannot be done with a single query.
C. db.sample.update( { " _id " : 3 > , { " _id " : 7 , " c " : 4 , { " $unset " : [ " a " , " b " ] } } )
D. db.sample.update( { " _id " : 3 } , { " $set " : { " _id " : 7 , " c " : 4 > > )

Answer: C

NEW QUESTION # 135
Which of the following commands can cause the database to be locked?

A. All of the above
B. Issuing a query
C. Map-reduce
D. Inserting data

Answer: A

NEW QUESTION # 136
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({commerits.$.author":-l});
B. db.posts.createIndex({comments.$.author": {$desc:l>});
C. db.posts.createIndex({comments.author":-l});

Answer: C

NEW QUESTION # 137
......

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