2026 Valid C100DBA: MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Latest Exam Cost

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MongoDB C100DBA Exam Overview:

Certification Vendor:	MongoDB
Exam Name:	MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)
Exam Number:	C100DBA
Exam Format:	Scenario-based, Multiple Choice, Multiple Select
Available Languages:	English
Certificate Validity Period:	3 years
Exam Duration:	120 minutes
Related Certifications:	MongoDB Certified DBA Professional MongoDB Certified Developer Associate
Recommended Training:	MongoDB University Learning Platform
Exam Registration:	MongoDB Certification Portal
Sample Questions:	MongoDB C100DBA Sample Questions
Exam Way:	Online proctored exam
Pre Condition:	Recommended practical experience administering MongoDB deployments (approximately 6+ months) and familiarity with MongoDB 4.4 features.
Official Syllabus URL:	https://www.mongodb.com/certification

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MongoDB C100DBA exam is a certification exam that is designed to test the skills of individuals who wish to become certified MongoDB Database Administrators. C100DBA exam is based on MongoDB 4.4, which is the latest version of the NoSQL database management system. MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) certification is offered by MongoDB University, which is the official training and certification program for MongoDB.

What are the questions asked in MongoDB C100DBA Exam

The questions are to be answered using Write, Flush, Recover, and Update policies for MongoDB. Command-line interface tools are used to administer, install, configure, monitor, secure, and troubleshoot MongoDB. Dumps offered by MongoDB C100DBA Certification Exam help people to improve their weaknesses in this entry-level certification exam.

The C100DBA exam is based on MongoDB 4.4, which is the latest version of the popular NoSQL database. C100DBA exam covers a range of topics, including database architecture, data modeling, security, performance optimization, and backup and recovery. Passing C100DBA exam demonstrates a deep understanding of MongoDB and its various features, making it a valuable asset for professionals who work with MongoDB databases.

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q166-Q171):

NEW QUESTION # 166
What attribute of the oplog ensures consistency in a replicated dataset?

A. Concurrency Control
B. Flow Control
C. Idempotent
D. Natural Ordering

Answer: C

Explanation:
MongoDB describes oplog operations as idempotent. An idempotent operation can be reapplied without causing an unintended cumulative change beyond the intended final state. This property is important for replication and recovery because secondary members copy and apply oplog entries, and operational processes may need to reason safely about replay. MongoDB can represent client write activity in oplog-friendly forms specifically to preserve appropriate replication semantics. Natural ordering is relevant to the capped collection structure of the oplog, but it is not the attribute identified by the question as providing safe repeatable application behavior. Concurrency control governs simultaneous operations and storage-engine coordination rather than the defining form of oplog entries. Flow control is a replica-set mechanism that can regulate the primary ' s write throughput when replication lag threatens majority-commit behavior; it does not make individual oplog entries safe to replay. The idempotent nature of oplog operations supports deterministic replication and contributes to consistent secondary state as operations are applied in sequence. Therefore the correct attribute among the options is Idempotent, making D correct.
Study Guide reference/topic:Cluster Reliability and Data Resilience - the oplog, idempotent replication operations, replay, and consistency.

NEW QUESTION # 167
Which of the following commands will return all the posts with number of likes greater than 100 and less than
200, both inclusive?

A. db.posts.find({ likes : { $gt : 100, $lt : 200 > > );
B. db.posts.find({ likes : { $gt : 100 , $lte : 200 } } );
C. db.posts.find({ likes : { $gte : 100 , $lte : 200 } } );
D. db.posts.find({ likes : { $gte : 100, $lt : 200 } } );

Answer: C

NEW QUESTION # 168
Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?

A. To help in disaster recovery
B. To enable certain read preference settings
C. To add greather redundancy
D. To protect agains network partitions
E. For more efficient backup operations

Answer: D

NEW QUESTION # 169
What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them hidden.
The set also has an arbiter?

A. None of the above
B. 0
C. 1
D. 2

Answer: B

NEW QUESTION # 170
In what format does mongodump creates backup files?

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

Answer: B

NEW QUESTION # 171
......

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