C100DBA Exam Dumps - Try Best C100DBA Exam Questions from Training Expert DumpsTorrent
Practice Examples and Dumps & Tips for 2022 Latest C100DBA Valid Tests Dumps
Prerequisites of MongoDB C100DBA Exam
- MongoDB C100DBA: Deploy and Maintain
- MongoDB Developer Certified Associate
- MongoDB C100DBA: Installation and Administration: Essentials
- MongoDB CMEv5 Implementation Engineer
NEW QUESTION 22
Mongodb does provide high availability via which option?
- A. Journaling
- B. Replication
- C. Indexing
- D. Sharding
Answer: B
NEW QUESTION 23
Which of the following aggregation commands in MongoDB does not support sharded collections?
- A. group
- B. mapReduce
- C. All of the above
- D. aggregate
Answer: A
NEW QUESTION 24
Which is the default mode in which the explain() command runs?
- A. queryPlanner
- B. customExecutionStats
- C. executionStats
- D. allPlansExecution
Answer: A
NEW QUESTION 25
By default, the MongoDB cursor in mongo shell is configured to return how many documents? To get the next set of documents, which command is used?
- A. No limit, none
- B. 20, it
- C. 50, it
- D. 200, more
Answer: B
NEW QUESTION 26
What is the maximum size of a MongoDB document
- A. 12 MB
- B. 2 MB
- C. 16 MB
- D. There is no maximum size. It depends on the RAM.
Answer: C
NEW QUESTION 27
Below is a sample document in a given collection test.
{ a : 5, b : 3, c: 2, d : 1 >
Given a compound index { a: 1, b:l, c:l, d:l}, Which of the below query will not use in-memory sorting? Select all valid.
- A. db.test.find( { a: 5, b: 3 } ).sort( { a: 1} )
- B. db.test.find( { a: 5, b: 3 } ).sort( { c: 1, d : 1 } )
- C. db.test.find( { a: 5, b: 3 } ).sort( {c: 1 } )
- D. db.test.find( { a: 5, b: 3 } ).sort( { a: 1, b: 1, c: 1 > )
Answer: B,C
NEW QUESTION 28
Which of the documents below will be retrieved by the following query? Assume the documents are stored in a collection called "sample". Check all that apply.
db.sample.find( { "$or" : [ { "a" : { "$in" : [ 3, 10] > }, { "b" : { "$lt" : 2 > > ] > )
- A. { \Jd" :10,"a": 3, "c": 1, "b": 1}
- B. {".Jd" :: 5, "a": 3, "c" :: 0, "b": 12}
- C. {".Jd" :: 1, "a": 0, "c" :: 0, "b": 2}
- D. {".Jd" :: 4, "a": 5, "c" :: 0, "b": 17}
- E. { ''\Jd" :9, "a": 17, "c": 1, "b": 1}
- F. {''__id" :3, "a": 4, "c" :0, "b" :14}
- G. {".Jd" :: 2, "a": 2, "c" :: 0, "b": 1}
- H. {".Jd" :: 8, "a": 11, "c": 1, "b": 0}
- I. {".Jd" :6, "a": 1, "c" :1, "b" :5}
- J. {''_Jd" :7, "a": 8, "c" :1, "b" :7}
Answer: A,B,E,G,H
NEW QUESTION 29
Which of the following collections stores authentication credentials in MongoDB?
- A. users.users
- B. system.users
- C. test.users
- D. local.users
Answer: B
NEW QUESTION 30
In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)
- A. Skip and limit nullify each other. Hence returning the first five documents
- B. Skips the first five documents and returns the sixth document five times
- C. Limits the first five documents and then return them in reverse order
- D. Skips the first five documents and returns the next five
Answer: D
NEW QUESTION 31
In a sharded cluster, from which node does one stop the balancer process before initiating backup?
- A. config server node
- B. mongos node
- C. replicaset primary node
- D. Any node
Answer: B
NEW QUESTION 32
Which of the following is a valid Replica Set configuration if you want:
1-Have 3 copies of everything
2- That RS3 is never primary
2- That RSI and RS2 can be primary?
You had to see the different configurations, RS3 could be hidden or priority 0 (But not a referee because we need
3 replicas), while RSI and RS2 could NOT have priority 0 or be hidden or anything like that In a 4-member RS RSO , RSI, RS2 and RS3 + Referee, RSO (primary) falls after some write operations that have replicated RSI and RS2 (but NOT RS3), who can get up as the new primary?
The configuration comes and in it we see that RS2 has a hidden: true (or a priority: 0, (I don't remember)
- A. ORS3
- B. O arbiter
- C. RSO
- D. ORS1
- E. ORS2
Answer: D
NEW QUESTION 33
What tool do you use to see if you have a problem in the consumption of disk I / 0?
Answer:
Explanation:
Mongoperf
NEW QUESTION 34
Consider the following document from the products collection:
What does the following query using $elemMatch return? db.products.find( { product_code: "345678" }, { variations: { $elemMatch: { size: ^L^ } } } )
- A. Returns the document but with only one element in the variations array (corresponding to size L)
- B. Returns the complete document but retrieves only the size field from the array
- C. Returns the complete document since MongoDB does not support partial array retrieval
- D. Returns the complete document but retrieves only the size field from the array and also with only one element in the variations array (corresponding to size L)
Answer: A
NEW QUESTION 35
Given a collection posts as shown below having a document array comments, which of the following command will create an index on the comment author descending?
- A. db.posts.createIndex({^comments.$.author":-l});
- B. db. posts.createIndex({^comments.author" :1});
- C. db.posts.createIndex({^commerits.author";-!});
Answer: C
NEW QUESTION 36
Which of the following node is used during election in a replication cluster?
- A. primary
- B. secondary
- C. arbiter
- D. hidden
Answer: C
NEW QUESTION 37
You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?
- A. A document with an _id assigned to be an Objectld
- B. No document will be inserted; an error will be raised
- C. A document will be inserted with the same _id as the last document inserted
- D. An empty document
- E. A document that matches the collection's existing schema, but with null fields
Answer: A
NEW QUESTION 38
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.
- A. db.collection.insert( { a:341})
- B. db.collection.update({b:456>, {$inc: {a:l> })
- C. db.collection.find( {a : 232} )
Answer: A,B
NEW QUESTION 39
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What Needs to Be Done Before Confronting this Exam
The best-suited approach to preparing for this exam is through both multiple-choice and programming questions. So if you prepare by only taking the exams, you will find it easier to pass. However, since the MongoDB C100DBA exam really requires knowledge of MongoDB's official documentation, reading prior materials is absolutely necessary. If you are not very familiar with MongoDB or do not have much knowledge of it, then I would recommend that you spend time practicing taking multiple-choice exams online before attempting the actual exam. Real exam simulation on a website is the best way to pass the test because those websites have been made to test exactly what the actual exams will be like. By using these practice exams, you will have all of your questions answered and you can be better prepared for when it is your time to take the exam. Real exam simulation is highly recommended.
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