(PDF) MongoDB Certified DBA Associate C100DBA Exam and Certification Test Engine
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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.
The C100DBA certification exam is a comprehensive test that covers a broad range of topics related to MongoDB database administration. C100DBA exam consists of 60 multiple-choice questions that must be completed within 90 minutes. The passing score for the exam is 65%.
Objectives for MongoDB C100DBA Exam
The following are some of the objectives for the MongoDB C100DBA certification exam.
- Administering MongoDB software.
- How to create, use, modify, and delete databases.
- How to administer indexes, collections, replication configuration settings, and replica sets in a replica set group.
- Operations management operations using administration tools such as Mongo shell or console client, or using access control lists (ACL).
- How to use backup and restore client tools, or MongoDB Cloud Manager.
- How to configure security for both shared and dedicated administrator users in MongoDB Cloud Manager.
Free update and bug fixes for 90 days and unlimited technical support by email and/or telephone. Exam preparation for this exam requires knowledge of the concepts covered in the MongoDB C100DBA Exam Study Guide. So, you are encouraged to download the MongoDB C100DBA Exam Study Guide here. MongoDB C100DBA Dumps is the latest and the most useful exam dumps for the MongoDB C100DBA certification exam. Valid answer for this exam, candidates must take into account the subject, the available answer options, and how they fit with the intention of the statement. Remember that for this exam you must know everything about MongoDB using MongoDB's official documentation.
It is strongly advised to go through all chapters in MongoDB C100DBA Exam Study Guide before taking the exam. Make sure you have a piece of good knowledge of what is discussed in each chapter. The more you practice taking multiple-choice exams, the easier it will be for you to pass this exam with flying colors. I would advise before taking this examination to first take some online multiple-choice exams so that you are familiarized with the format of these exams.
NEW QUESTION # 25
Which of the following about Capped Collections is correct?
- A. High-throughput operations that insert and retrieve documents based on insertion order
- B. Fixed Size
- C. If the allocated space for a capped collection exceeds, it stops inserting new documents
- D. Only "Fixed Size" and "High-throughput operations that insert and retrieve documents based on insertion order"
Answer: D
NEW QUESTION # 26
Which of the tags in a replica set configuration specify the operations to be read from the node with the least network latency?
- A. secondaryPreferred
- B. netLatency
- C. nearest
- D. primaryPreferred
Answer: C
NEW QUESTION # 27
What does the following aggregate query perform?
- A. 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
- B. Fetches the posts with likes between 100 and 200 and sets their _id as null
- C. Groups the posts by number of likes (101, 102, 103.) by adding 1 every time
- D. Calculates the number of posts with likes between 100 and 200
Answer: D
NEW QUESTION # 28
The following aggregation option is used to specify the specific fields that needs to be passed to the next stage of the aggregation pipeline:
- A. $aggregate
- B. $group
- C. $project
- D. $match
Answer: C
NEW QUESTION # 29
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. None of the above
- B. 0
- C. 1
- D. 2
Answer: C
NEW QUESTION # 30
MongoDB is a schema-less design.
- A. False
- B. True
Answer: B
NEW QUESTION # 31
What is the use of mongodump and mongorestore tools?
- A. backup mongodb deployment
- B. performance tune mongodb deployment
- C. replicate mongodb deployments
- D. audit mongodb deployment
Answer: A
NEW QUESTION # 32
The difference between $push and $addToSet is:
- A. $addToSet adds the item to the field only if the new item is of the same datatype
- B. $addToSet adds the item to the field only if it does not exist already; while $push pushes the item to the field irrespective of whether it was present or not
- C. There is no major difference between them. $addToSet is a deprecated version of $push.
- D. $addToSet needs the fields to be already present while $push will work even if the field is not present
Answer: B
NEW QUESTION # 33
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: C
NEW QUESTION # 34
Which of the following operator can be used to limit the number of documents in an array field of a document after an update is performed?
- A. $removeFromSet
- B. None of the above
- C. $arrayLimit
- D. $push along with $each, $sort and $slice
Answer: D
NEW QUESTION # 35
Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?
- A. String, Null, Number and Object
- B. Number, Null, String and Object
- C. Null, Number, String and Object
- D. Null, Number, Object and String
Answer: C
NEW QUESTION # 36
The MongoDB explain() method does not support which of the following verbosity mode:
- A. allPlansExecution
- B. customExecutionStats
- C. queryPlanner
- D. executionStats
Answer: D
NEW QUESTION # 37
You perform the following query on the sayings collection, which has the index
{ quote : "text" }:
Assuming the documents below are in the collection, which ones will the following query return? Check all that apply.
db.sayings.find( { $text : { $search : "fact find" } } )
- A. { _id : 3, quote : "Nobody will ever catch me." }
- B. { _id : 1, quote : "That's a fact, Jack." }
- C. { _id : 2, quote : "Find out if that fact is correct." }
Answer: B,C
NEW QUESTION # 38
Consider that you have a collection called population which has fields state and city. Which of the following query will calculate the population grouped by state and city?
- A. db.population.aggregate( [{ $group: { _id: { state: Estate", city: "$city" },pop: { $sum: 1 > > >] )
- B. db.population.aggregate( [{ $group: { _id: { state: Estate", city: "$city" },pop: { $sum: "$pop" } } }] )
- C. db.population.aggregate( [{ $group: { _id: { state: "$state", city: "$city" },pop: { $pop: 1 } } }] )
- D. db.population.aggregate( [{ $group: { _id: { city: "$city" },pop: { $sum: "$pop" } } }] )Multi Document Transaction is not supported by MongoDB
Answer: B
NEW QUESTION # 39
Consider that our posts collection contains an array field called tags that contains tags that the user enters. {
Which of the following commands will find all the posts that have been tagged as tutorial.
- A. db.posts.find( { tags : ["tutorial"] } );
- B. db.posts.findInArray( { tags : "tutorial" > );
- C. db.posts.find( { tags : "tutorial" } );
- D. db.posts.find( { $array : {tags: "tutorial") > );
Answer: C
NEW QUESTION # 40
Which of the following command is used to get all the indexes on a collection?
- A. db.collection.getlndexesQ
- B. db.showIndexes()
- C. db.collection.showIndexes()
- D. db.collection.findlndexes()
Answer: A
NEW QUESTION # 41
Below is a sample document of "orders" collection
Answer:
Explanation:
$sort
NEW QUESTION # 42
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: 10 } } )
- B. db.posts.find( { post_timestamp: { $type: null } } )
- C. db.posts.find( { post_timestamp : { $type; 10 > > )
- D. db.posts.find( { post_timestamp: { $fieldtype: null } } )
Answer: B
NEW QUESTION # 43
Consider the following example document from the sample collection. All documents in this collection have the same schema.
Which of the following queries will replace this with the document.
- A. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 , { "$unset" : [ "a" , "b" ] } } )
- B. db.sample.update( { "_id" : 3 } , { "$set" : { "_id" : 7 , "c" : 4 > > )
- C. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > )
- D. db.sample.update( { "_id" : 3 > , { "_id" : 7 , "c" : 4 > , { "justOne" : true > ) / This operation cannot be done with a single query.
Answer: A
NEW QUESTION # 44
A collection and a document in MongoDB is equivalent to which of the SQL concepts respectively?
- A. Database and Table
- B. Table and Column
- C. Table and Row
- D. Column and Row
Answer: C
NEW QUESTION # 45
Which of the following commands can cause the database to be locked?
- A. Map-reduce
- B. All of the above
- C. Inserting data
- D. Issuing a query
Answer: B
NEW QUESTION # 46
Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.
- A. db.collection.find( {a : 232} )
- B. db.collection.update({b:456>, {$inc: {a:l> })
- C. db.collection.insert( { a:341})
Answer: B,C
NEW QUESTION # 47
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({^commerits.author";-!});
- B. db. posts.createIndex({^comments.author" :1});
- C. db.posts.createIndex({^comments.$.author":-l});
Answer: A
NEW QUESTION # 48
Update If Correct is an approach for which of the following concepts in MongoDB:
- A. Atomicity
- B. Performance Management
- C. Concurrency Control
- D. Transaction Management
Answer: C
NEW QUESTION # 49
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