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MongoDB C100DBA certification exam covers a wide range of topics, including database architecture, data modeling, query optimization, security, and scalability. It is a performance-based exam that evaluates your skills in real-world scenarios. C100DBA exam consists of 60 multiple-choice questions, and you have 90 minutes to complete it. C100DBA exam fee is $150, and you can take the exam online or at a testing center.

MongoDB C100DBA exam is a challenging and comprehensive test that covers various topics related to MongoDB database administration. C100DBA Exam covers topics such as MongoDB architecture, installation and configuration, data management, security, backup and recovery, and performance tuning. C100DBA exam consists of 60 multiple-choice questions and has a time limit of 90 minutes. Candidates must score at least 65% to pass the exam and earn the MongoDB Certified DBA Associate certification.

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q59-Q64):

NEW QUESTION # 59
Consider a products collection:
{ " _id " : 1, " item " : " t-shirt " , " color " : " red " , " price " : 10 }
{ " _id " : 2, " item " : " sweater " , " color " : " green " , " price " : 20 }
{ " _id " : 3, " item " : " belt " , " color " : " black " , " price " : 15 }
{ " _id " : 4, " item " : " hat " , " color " : " green " , " price " : 12 } What operation modifies the price of all products that have a color value of " green " ?

A. db.products.updateMany({ " color " : " green " }, { " price " : { " $inc " : 5 } })
B. db.products.update({ " color " : " green " }, { $inc: { " price " : 5 } })
C. db.products.updateMany({ " color " : " green " }, { " $inc " : { " price " : 5 } })
D. db.products.update({ " color " : " green " }, { " price " : { " $inc " : 5 } })

Answer: C

Explanation:
The operation must update every matching document and use the $inc update operator with correct syntax.
updateMany() applies the update to all documents matching { color: " green " }. The $inc operator must be the top-level update operator and receive a field-to-amount mapping, so the valid update document is { $inc: { price: 5 } }. Option C satisfies both requirements. The sweater price increases from 20 to 25, and the hat price increases from 12 to 17. Option B uses a syntactically correct $inc expression, but the legacy update() call shown does not explicitly request a multi-document update, so it does not meet the stated requirement to modify all green products. Options A and D place $inc beneath the price field instead of placing $inc at the update-operator level, which is not valid update syntax. $inc operates atomically on each affected document and can be used with positive or negative numeric increments. Therefore, the correct multi-document update is db.products.updateMany({color: " green " }, {$inc:{price:5}}), making C correct.
Study Guide reference/topic:MongoDB Architecture and Core Operations - updateMany(), update operators, filters, and $inc.

NEW QUESTION # 60
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":-l});
B. db.posts.createIndex({comments.$.author": {$desc:l>});
C. db.posts.createIndex({commerits.$.author":-l});

Answer: A

NEW QUESTION # 61
Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?

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

Answer: A

NEW QUESTION # 62
Update If Correct is an approach for which of the following concepts in MongoDB:

A. Concurrency Control
B. Atomicity
C. Transaction Management
D. Performance Management

Answer: A

NEW QUESTION # 63
Consider that the posts collection contains an array called ratings which contains ratings given to the post by various users in the following format:

Which of the following query will return all the documents where the ratings array contains elements that in some combination satisfy the query conditions?

A. db.inventory.find( { ratings: { $elemMatch: { $gt: 3, $lt: 6 }
B. db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )
C. db.inventory.find( { ratings: { $elemMatch: { $gte: 3, $lte: 6 } } } )
D. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )

Answer: B

NEW QUESTION # 64
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