Latest [Jun 23, 2024] 100% Passing Guarantee - Brilliant C100DBA Exam Questions PDF
C100DBA Certification – Valid Exam Dumps Questions Study Guide! (Updated 130 Questions)
NEW QUESTION # 19
Which of the following are valid json documents? Select all that apply.
- A. { }
- B. {"name":"Fred Flintstone";"occupation":"Miner";"wife":"Wilma"}
- C. {"city":"New York", "population", 7999034, boros:{"queens", "manhattan", "staten island", "the bronx", u "brooklyn"}}
- D. {"a":l, "b":{"b":l, "c":"foo", "d":"bar", "e":[l,2,4]}}
Answer: A,D
NEW QUESTION # 20
'$set' sets the value of
- A. Code block
- B. None of the above
- C. Key
- D. Name/value pair
Answer: C
NEW QUESTION # 21
What is the defau size of a GridFS chunk?
- A. 255 K
- B. 1 MB
- C. 2 MB
- D. 16 MB
Answer: A
NEW QUESTION # 22
Which of the following collections stores authentication credentials in MongoDB?
- A. test.users
- B. users.users
- C. system.users
- D. local.users
Answer: C
NEW QUESTION # 23
You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?
- A. No document will be inserted; an error will be raised
- B. A document with an _id assigned to be an Objectld
- C. A document that matches the collection's existing schema, but with null fields
- D. A document will be inserted with the same _id as the last document inserted
- E. An empty document
Answer: B
NEW QUESTION # 24
Which of the following commands will return all the posts with number of likes greater than 100 and less than
200, both inclusive?
- A. db.posts.find({ likes : { $gte : 100 , $lte : 200 } } );
- B. db.posts.find({ likes : { $gt : 100, $lt : 200 > > );
- C. db.posts.find({ likes : { $gte : 100, $lt : 200 } } );
- D. db.posts.find({ likes : { $gt : 100 , $lte : 200 } } );
Answer: A
NEW QUESTION # 25
Which command can be used to rebuild the indexes on a collection in MongoDB?
- A. db.collection.reIndex({author:l})
- B. db.collection.relndexQ
- C. db.collection.createIndex({author:l}).reIndex()
- D. db.collection.createlndex({relndex:l})
Answer: B
NEW QUESTION # 26
What tool would you use if you want to save a gif file in mongo?
Answer:
Explanation:
mongofile
NEW QUESTION # 27
Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc. Which of the following query retrieves ONLY the key named post_text from the first document retrieved?
- A. db.posts.finOne({},{_id:0, post_text:1})
- B. db.posts.find({},{_id:Of post_text:1})
- C. db.posts.finOne{},{post_text:l})
- D. db.posts.findOne({post_text: 1})
Answer: A
NEW QUESTION # 28
Consider the following example document:
{
"_id": Objectld("5360c0a0a655a60674680bbe"),
"user"
"login": "irOn"
"description": "Made of steel"
"date": ISODate("2014-04-30T09:16:45.836Z"),
}
>
and index creation command:
db.users.createlndex( { "user.login": 1, "user.date": -1 }, "mylndex" )
When performing the following query:
db.users.find( { "user.login": /Air.*/ }, { "user":1, "_id":0 } ).sort( { "user.date":1 } )
which of the following statements correctly describe how MongoDB will handle the query? Check all that apply.
- A. As an indexed query using "mylndex" because field "user.login" is indexed
- B. As a covered query using "mylndex" because we are filtering out "_id" and only returning "user.login"
- C. None of the above
- D. MongoDB will need to do a table/collection scan to find matching documents
- E. As an optimized sort query (scanAndOrder = false) using "mylndex" because we are sorting on an indexed field
Answer: A
NEW QUESTION # 29
Which is the default mode in which the explain() command runs?
- A. queryPlanner
- B. allPlansExecution
- C. customExecutionStats
- D. executionStats
Answer: A
NEW QUESTION # 30
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" :: 5, "a": 3, "c" :: 0, "b": 12}
- B. { ''\Jd" :9, "a": 17, "c": 1, "b": 1}
- C. {''_Jd" :7, "a": 8, "c" :1, "b" :7}
- D. {''__id" :3, "a": 4, "c" :0, "b" :14}
- E. {".Jd" :: 1, "a": 0, "c" :: 0, "b": 2}
- F. {".Jd" :: 2, "a": 2, "c" :: 0, "b": 1}
- G. {".Jd" :6, "a": 1, "c" :1, "b" :5}
- H. {".Jd" :: 4, "a": 5, "c" :: 0, "b": 17}
- I. { \Jd" :10,"a": 3, "c": 1, "b": 1}
- J. {".Jd" :: 8, "a": 11, "c": 1, "b": 0}
Answer: A,B,F,I,J
NEW QUESTION # 31
Aggregation Pipelines have a limit of:
- A. 2 MB document and 100 MB RAM
- B. 16 MB document and 100 MB RAM
- C. 2 MB document and no limit on RAM
- D. No limit on document and 100 MB RAM
Answer: B
NEW QUESTION # 32
What does the totalKeysExamined field returned by the explain method indicate?
- A. Number of index entries scanned
- B. Number of documents scanned
- C. Details the completed execution of the winning plan as a tree of stages
- D. Number of documents that match the query condition
Answer: A
NEW QUESTION # 33
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: { $elemMatch: { $gte: 3, $lte: 6 } } } )
- C. db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )
- D. db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )
Answer: D
NEW QUESTION # 34
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. primaryPreferred
- B. nearest
- C. primary
- D. secondaryPreferred
- E. Secondary
Answer: A
NEW QUESTION # 35
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 complete document since MongoDB does not support partial array retrieval
- B. Returns the document but with only one element in the variations array (corresponding to size L)
- C. 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)
- D. Returns the complete document but retrieves only the size field from the array
Answer: B
NEW QUESTION # 36
In a replicated cluster, which of the following node would only be used during an election?
- A. secondary
- B. primary
- C. hidden
- D. arbiter
Answer: D
NEW QUESTION # 37
......
What is MongoDB C100DBA Exam
The MongoDB C100 certification series is a set of certifications to what level a developer, System administrator, or technical support can administer MongoDB properly. This exam is the first in the MongoDB C100 certification series that test your skills in administering, installing, configuring, monitoring, securing, and troubleshooting MongoDB. Questions are made up of multiple-choice, fill-in-the-blank, or programming code. The exam is written by MongoDB engineers and consists of 135 questions and a 1 hour and 10 minutes time limit. PDF of the exam can be downloaded from the official MongoDB web page. The first step to preparing for the exam is to review all the materials that are available online. The study materials are available on the MongoDB website as well as on the MongoDB certification home page. Time Management It is absolutely necessary to make a timetable, as it is with any other certification exam.
Those who have been working with MongoDB before should already have an idea of what chapters they need to concentrate more on. Preparation for the exam is very important because the majority of questions are based on the knowledge gained so far when studying for MongoDB. It is very important to have a firm grasp of all concepts taught in previous courses, so reading previous materials is absolutely necessary. Answer Format The format of the exam is a mix of multiple-choice, fill-in-the-blank, and programming questions. The multiple-choice questions are based on MongoDB's official documentation and have been taken from the official MongoDB website. Based on this, the multiple-choice exam question will have a subject, a list of options for that subject, and a short answer. MongoDB C100DBA Dumps will be very helpful for passing the exam. However, the other question formats are not as clearly defined as the multiple-choice questions and maybe more challenging depending on what level of MongoDB you have mastered. In the fill-in-the-blank questions, the user is expected to complete a table or program based on MongoDB's official documentation. In the programming questions, the user is required to write down code from MongoDB's official documentation and a database query language. The programming question will have a set of libraries that needs to be integrated together.
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