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C100DBA Dumps 2023 - New MongoDB C100DBA Exam Questions
MongoDB C100DBA certification exam is designed to test the skills and knowledge of database administrators who work with MongoDB. C100DBA exam is based on the latest version of MongoDB, version 4.4, and covers a range of topics including data modeling, performance tuning, security, and high availability. C100DBA exam is intended for individuals who have experience working with MongoDB in a production environment and are looking to validate their skills and knowledge.
Achieving the MongoDB C100DBA certification demonstrates a candidate's proficiency in MongoDB database administration and can help them stand out in the job market. Certified professionals have a competitive advantage when it comes to job opportunities and salary negotiations. Additionally, MongoDB C100DBA certification holders are eligible to apply for higher-level MongoDB certifications, such as the MongoDB Certified Database Administrator, which can further enhance their career prospects.
NEW QUESTION # 66
In a replicated cluster, which of the following node would only be used during an election?
- A. hidden
- B. arbiter
- C. secondary
- D. primary
Answer: B
NEW QUESTION # 67
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. 0
- B. None of the above
- C. 1
- D. 2
Answer: D
NEW QUESTION # 68
Which of the following is supported by MongoDB?
- A. Transaction Management
- B. Journaling
- C. Relationships between Collections (Primary Key Foreign Key)
- D. ACID Transactions
Answer: B
NEW QUESTION # 69
Which type of indexes does MongoDB support?
- A. Multikey Indexes
- B. Geospatial Indexes
- C. Compound Indexes
- D. All of the above
Answer: D
NEW QUESTION # 70
What read preference should your application use if you want to read from the primary under normal circumstances but allow reads from secondaries when a primary is unavailable?
- A. Secondary
- B. nearest
- C. secondaryPreferred
- D. primaryPreferred
- E. primary
Answer: D
NEW QUESTION # 71
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: { ratings: { $gt: 5, $lt: 9 } } } )
- B. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )
- C. db.inventory.find( { ratings: { $elemMatch: { $gt: 3, $lt: 6 }
- D. db.inventory.find( { ratings: { $elemMatch: { $gte: 3, $lte: 6 } } } )
Answer: A
NEW QUESTION # 72
Mongodb does provide high availability via which option?
- A. Replication
- B. Journaling
- C. Sharding
- D. Indexing
Answer: A
NEW QUESTION # 73
As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:
- A. Providing these parameters in any order does not impact the performance
- B. $match moves before $sort
- C. MongoDB does not do any movements by default and will use the order provided
- D. $sort moves before $match
Answer: B
NEW QUESTION # 74
You have designed a web application with mongoDB. You have configured replication. The replica set is in place and function properly. What happens in case of failure?
- A. Switchover needs to be done manually
- B. Failover needs to be done manually
- C. Switchover happens automatically
- D. Failover happens automatically
Answer: D
NEW QUESTION # 75
JSON stands for
- A. JavaScript Object Naming
- B. None of the above
- C. JavaScript Object Notation
- D. JavaScript Object Notice
Answer: C
NEW QUESTION # 76
Which option should be used to update all the documents with the specified condition in the MongoDB query?
- A. specify {all: true} as the third parameter of update command
- B. specify {multi : true} as the third parameter of update command
- C. specify {updateAII: true} as the third parameter of update command
- D. updateAII instead of update
Answer: B
NEW QUESTION # 77
Which operations add new documents to a collection?
- A. insert
- B. update
- C. Create
- D. delete
Answer: A,C
NEW QUESTION # 78
In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)
- A. Skips the first five documents and returns the sixth document five times
- B. Skips the first five documents and returns the next five
- C. Limits the first five documents and then return them in reverse order
- D. Skip and limit nullify each other. Hence returning the first five documents
Answer: B
NEW QUESTION # 79
Aggregation Pipelines have a limit of:
- A. 2 MB document and 100 MB RAM
- B. 2 MB document and no limit on RAM
- C. No limit on document and 100 MB RAM
- D. 16 MB document and 100 MB RAM
Answer: D
NEW QUESTION # 80
Which of the following is a valid insert statement in mongodb? Select all valid.
- A. db.test.push({x:2,y:"apple"})
- B. db.test.insert({x:2,y:"apple"})
- C. db.test.insert({x:2},{y:"apple"})
- D. db.test.insert{"x":2, "y":"apple"})
Answer: B,D
NEW QUESTION # 81
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.
- A. db.collection.find( {a : 232} )
- B. db.collection.insert( { a:341})
- C. db.collection.update({b:456>, {$inc: {a:l> })
Answer: B,C
NEW QUESTION # 82
What does the following $slice query return using the following command? db.posts.find( {}, { comments: {
$slice: [ -10, 5 ] } } )
- A. Returns 10 comments, beginning with the first
- B. Returns 10 comments, beginning with the last
- C. Returns 5 comments, beginning with the last 10 items
- D. Returns 5 comments, beginning with the first 10 items
Answer: C
NEW QUESTION # 83
Given a replica set with five data-bearing members, suppose the primary goes down with operations in its oplog that have been copied from the primary to only one secondary. Assuming no other problems occur, which of the following describes what is most likely to happen?
- A. the primary may roll back the operations once it recovers
- B. the secondary with the most current oplog will be elected primary
- C. missing operations will need to be manually re-performed
- D. reads will be stale until the primary comes back up
- E. the most current secondary will roll back the operations following the election
Answer: B
NEW QUESTION # 84
What tool do you use to see if you have a problem in the consumption of disk I / 0?
Answer:
Explanation:
Mongoperf
NEW QUESTION # 85
MongoDB is a schema-less design.
- A. False
- B. True
Answer: B
NEW QUESTION # 86
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 # 87
Which of the following needs to be performed prior to initiate backup on a sharded cluster?
- A. sh.stopServer( )
- B. sh.stopBalancer( )
- C. db.stopServer( )
- D. db.stopBalancer( )
Answer: B
NEW QUESTION # 88
What is the defau size of a GridFS chunk?
- A. 16 MB
- B. 255 K
- C. 2 MB
- D. 1 MB
Answer: B
NEW QUESTION # 89
You are comparing values of different BSON types in mongodb. You want to compare from lowest to highest.
Which comparison order is used?
- A. Object/Array^inData/Symbol,MinKey, Null, Numbers,String
- B. MinKey, Null, Numbers,Object,Array,BinData,Symbol, String
- C. MinKey, Null, Numbers,Symbol, String,Object,Array,BinData
- D. Objec^Array^inData,Symbol, String,MinKey, Null, Numbers
Answer: C
NEW QUESTION # 90
Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?
- A. To protect agains network partitions
- B. To add greather redundancy
- C. To help in disaster recovery
- D. For more efficient backup operations
- E. To enable certain read preference settings
Answer: A
NEW QUESTION # 91
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MongoDB C100DBA Exam Practice Test Questions: https://examtests.passcollection.com/C100DBA-valid-vce-dumps.html
