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The C100DBA Certification Exam is based on the latest version of MongoDB, version 4.4. It covers a wide range of topics related to database administration, including installation and configuration, performance optimization, security, backup and recovery, and data modeling. C100DBA exam is designed to test the skills and knowledge of professionals who work with MongoDB databases on a daily basis and are responsible for ensuring that they are running smoothly and efficiently.

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Sample Questions (Q43-Q48):

NEW QUESTION # 43
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.push({x:2,y:"apple"})
D. db.test.insert({x:2,y:"apple"})

Answer: B,D

NEW QUESTION # 44
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: { $gte: 3, $lte: 6 } } } )
B. db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )
C. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )
D. db.inventory.find( { ratings: { $elemMatch: { $gt: 3, $lt: 6 }

Answer: B

NEW QUESTION # 45
Suposse tou have the following collection with only 2 documents:

If you run an aggregation query and use { $unwind: " $traits " } as the first stage, how many documents will be passed to the next stage of the aggregation pipeline?

A. 0
B. 1
C. 2
D. 3
E. 4

Answer: E

NEW QUESTION # 46
Which of the following is true about sharding?

A. A sharded environment does not support sorting functionality since the documents lie on various mongod instances
B. Creating a sharded key automatically creates an index on the collection using that key
C. Sharding is enabled at the database level
D. We cannot change a shard key directly/automatically once it is set up

Answer: D

NEW QUESTION # 47
Which of the following commands finds all the documents in the posts collection with post timestamp field as null?

A. db.posts.find( { post_timestamp: { $fieldtype: null } } )
B. db.posts.find( { post_timestamp : { $type; 10 > > )
C. db.posts.find( { post_timestamp: { $type: null } } )
D. db.posts.find( { post_timestamp: { $fieldtype: 10 } } )

Answer: B

NEW QUESTION # 48
......

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