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The average salary of a MongoDB C100DBA Exam in different countries, defined in MongoDB C100DBA Exam, is as follow:

South Africa: 62000 ZAR
United States: $64,600
Mexico: 62000 MXN

MongoDB C100DBA certification exam is offered by MongoDB, a popular NoSQL database management system that is used by many organizations worldwide. C100DBA Exam is designed to test the knowledge and skills of candidates in various areas of MongoDB database administration, including backup and recovery, security, performance tuning, and data modeling.

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MongoDB C100DBA is a certification exam designed for those who want to prove their expertise in the administration of MongoDB databases. It is a professional examination that gauges the knowledge and skills of individuals who are responsible for the management and maintenance of MongoDB database systems. C100DBA Exam is based on MongoDB 4.4, which is the latest version of the popular NoSQL database management system.

MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q97-Q102):

NEW QUESTION # 97
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 > , { " justOne " : true > ) / # This operation cannot be done with a single query.
B. db.sample.update( { " _id " : 3 } , { " $set " : { " _id " : 7 , " c " : 4 > > )
C. db.sample.update( { " _id " : 3 > , { " _id " : 7 , " c " : 4 > )
D. db.sample.update( { " _id " : 3 > , { " _id " : 7 , " c " : 4 , { " $unset " : [ " a " , " b " ] } } )

Answer: D

NEW QUESTION # 98
What does the output x of the following MongoDB aggregation query result into; db.posts.aggregate( [ {
$group: { _id; "$author", x: { $sum: $likes } } } ] )

A. Number of posts by an author
B. Sum of likes on all the posts by an author, grouped by author
C. Average of likes on all the posts of an author, grouped by author
D. Sum of likes on all the posts by all the authors

Answer: B

NEW QUESTION # 99
As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:

A. $match moves before $sort
B. Providing these parameters in any order does not impact the performance
C. $sort moves before $match
D. MongoDB does not do any movements by default and will use the order provided

Answer: A

NEW QUESTION # 100
What encoded format does MongoDB store documents in?

A. Base 64
B. JSON
C. XML
D. BSON

Answer: D

Explanation:
MongoDB stores records as BSON documents. BSON, short for Binary JSON, is a binary serialization format that preserves the JSON-like document model while supporting a richer set of data types required by database applications. Mongosh commonly displays documents using JavaScript or Extended JSON-like notation, which is why JSON is a tempting distractor, but the native stored representation is BSON. BSON supports types such as ObjectId, dates, binary data, timestamps, Decimal128, 32-bit and 64-bit integers, arrays, embedded documents, and other values that standard JSON does not represent natively. Base64 is an encoding technique often used to render binary data as text and is not MongoDB ' s document storage format.
XML is also unrelated to MongoDB ' s native representation. Understanding BSON is fundamental for database administrators because document-size limits, type comparisons, index keys, serialization behavior, and driver interoperability all depend on BSON semantics. The flexible document model allows fields to contain scalar values, nested documents, and arrays within the same record structure. Therefore the encoded format used by MongoDB to store documents is BSON, making option C correct.
Study Guide reference/topic:MongoDB Architecture and Core Operations - BSON, document structure, data types, and JSON/BSON distinctions.

NEW QUESTION # 101
Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?

A. String, Null, Number and Object
B. Null, Number, Object and String
C. Number, Null, String and Object
D. Null, Number, String and Object

Answer: D

NEW QUESTION # 102
......

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