[Mar-2023] Verified MongoDB C100DBA Bundle Real Exam Dumps PDF
C100DBA Dumps PDF New [2023] Ultimate Study Guide
What is the number of questions for the MongoDB C100DBA Exam
The number of questions is 60 multiple-choice questions.
NEW QUESTION 64
Which of the following operators is used to updated a document partially?
- A. $modify
- B. $update
- C. $project
- D. $set
Answer: D
NEW QUESTION 65
Update If Correct is an approach for which of the following concepts in MongoDB:
- A. Atomicity
- B. Concurrency Control
- C. Performance Management
- D. Transaction Management
Answer: B
NEW QUESTION 66
To add a new user and enable authentication in MongoDB, which of the following steps need be executed?
- A. update users collection and run db.enableAuthenticationQ
- B. update users collection and restart mongodb
- C. All of the above
- D. update users collection and restart mongodb with -auth option
Answer: D
NEW QUESTION 67
Which of the following statements are true about the $match pipeline operator? Check all that apply.
- A. It has a sintax similar to findQ commands.
- B. You should use it early as possible in the pipeline
- C. It can be used as many time as needed.
Answer: A,B,C
NEW QUESTION 68
In a sharded cluster, from which node does one stop the balancer process before initiating backup?
- A. replicaset primary node
- B. Any node
- C. mongos node
- D. config server node
Answer: C
NEW QUESTION 69
Mongodb does provide high availability via which option?
- A. Replication
- B. Indexing
- C. Sharding
- D. Journaling
Answer: A
NEW QUESTION 70
You are in a sharded cluster. What will you do prior to initiating backup in sharded cluster?
- A. sh.stopserverQ
- B. db.stopserver()
- C. sh.stopBalancer()
- D. db.stopBalancer()
Answer: C
NEW QUESTION 71
Which of the following is true about aggregation framework?
- A. Pipeline expressions are stateless except accumulator expressions used with $group operator
- B. the aggregate command operates on a multiple collection
- C. Each aggregation operator need to return atleast one of more documents as a result
- D. A single aggregation framework operator can be used more than once in a query
Answer: A,C,D
NEW QUESTION 72
Which of the tags in a replica set configuration specify the operations to be read from the node with the least network latency?
- A. primaryPreferred
- B. netLatency
- C. secondaryPreferred
- D. nearest
Answer: D
NEW QUESTION 73
What is the output of following two commands in MongoDB: db. posts. insert({n_id":l}) db.posts.insert({"_id":l})
- A. MongoDB will automatically increment the _id of the second document as 2
- B. This will throw a duplicate key error
- C. It will insert two documents and throw a warning to the user
- D. Two documents will be inserted with _id as 1
Answer: B
NEW QUESTION 74
Which of the following aggregate commands in MongoDB uses a pipeline approach with the goals of improving the aggregation performance?
- A. group
- B. aggregate
- C. All of the above
- D. mapReduce
Answer: B
NEW QUESTION 75
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 last
- B. Returns 10 comments, beginning with the first
- C. Returns 5 comments, beginning with the first 10 items
- D. Returns 5 comments, beginning with the last 10 items
Answer: D
NEW QUESTION 76
Which mongodb tools allow us to work with our data in a human readable format?
- A. mongoexport
- B. mongostat
- C. mongoimport
- D. mongodump
Answer: A,C
NEW QUESTION 77
Which node in a replica set does accept write operation?
- A. arbiter
- B. secondary
- C. primary
- D. hidden
Answer: C
NEW QUESTION 78
Which of the following does MongoDB use to provide High Availability and fault tolerance?
- A. Replication
- B. Indexing
- C. Write Concern
- D. Sharding
Answer: A
NEW QUESTION 79
In which of the following scenarios is sharding not the correct option. Select all that apply.
- A. The write operations on the collection are low
- B. The working set in the collection is expected to grow very large in size
- C. The write operations on the collection are very high
- D. The collection is a read intensive collection with less working set
Answer: A,D
NEW QUESTION 80
When should we consider representing a one-to-many relationship in an embedded collection instead of separate collection?
- A. When the many is not very large
- B. When the many is very large
- C. Never
- D. Always
Answer: A
NEW QUESTION 81
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: { $elemMatch: { $gt: 3, $lt: 6 }
- C. db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )
- D. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )
Answer: C
NEW QUESTION 82
Consider the following example document from the sample collection. All documents in this collection have the same schema.
Which of the following queries will replace this with the document.
- A. db.sample.update( { "_id" : 3 } , { "$set" : { "_id" : 7 , "c" : 4 > > )
- B. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > )
- C. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 , { "$unset" : [ "a" , "b" ] } } )
- D. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > , { "justOne" : true > ) / This operation cannot be done with a single query.
Answer: C
NEW QUESTION 83
Which operations add new documents to a collection?
- A. Create
- B. insert
- C. delete
- D. update
Answer: A,B
NEW QUESTION 84
Which of the following commands can cause the database to be locked?
- A. All of the above
- B. Issuing a query
- C. Inserting data
- D. Map-reduce
Answer: A
NEW QUESTION 85
What does the following aggregate query perform?
- A. Calculates the number of posts with likes between 100 and 200
- B. Fetches the posts with likes between 100 and 200, sets the _id of the first document as null and then increments it 1 every time
- C. Fetches the posts with likes between 100 and 200 and sets their _id as null
- D. Groups the posts by number of likes (101, 102, 103.) by adding 1 every time
Answer: A
NEW QUESTION 86
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Should I Always Take the Exam Multiple Times?
Yes, it's recommended that you take the C100DBA MongoDB exam multiple times. This is because MongoDB has a few online test simulations and actual tests, and they're all very different. When taking the actual test, I recommend that you keep quiet during each question so that you can focus on answering each question looking for keywords, or looking for things like punctuation errors. The engine is a great way to practice the exam and is also the best place to discuss any pre-exam questions or concerns you may have. I think it's important to always be prepared for the exam and make sure you know all of the information needed for passing, so I would recommend that you take each practice test at least twice. The C100DBA MongoDB examination process can take up to 2 hours or more, so make sure you have plenty of time to spare. It's also recommended that you have at least 30 minutes of break time between each question so that you can relax and walk around a little bit if needed.
Payment fees can be paid by credit card only so if you do not have a credit card you will not be able to pay the fee and take the exam. Payment is required for all exams done through Codecademy, so please remember to pay before you start the exam. The size of the exam varies according to the residency and other factors. MongoDB C100DBA Dumps is the best way to understand the contents of this exam. This test will be held at a place and time designated by the employer. The exam will be made available if there are more than 60 applicants and the number of questions is not enough. If so, you will be notified about changes in the number of questions before taking your exam. It takes approximately 30 minutes to 1 hour to take the C100DBA MongoDB test, so make sure you have plenty of time before sitting for it if you haven't finished all of your prerequisites first. The maximum size of the test is 45 questions and the minimum size of the test is 30 questions. Depending on your answers, you will either pass or fail the C100DBA MongoDB exam. However, even if you fail it once, you can take it again at a later date.
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