[Sep 25, 2022] Achive your Success with Latest MongoDB C100DBA Exam [Q66-Q90]

Achive your Success with Latest MongoDB C100DBA Exam [Sep 25, 2022]

The C100DBA Exam Test For Brief Preparation 

What Else Can I Do to Prepare for this Exam?

There are several sources of information to help you prepare for this exam, including books, training videos, or blogs. Here are some suggestions: MongoDB C100DBA exam is available in English. As twenty percent of MongoDB customers are from the United States, the certification exams are given in English only. You can consult with your customer service to find out what language version is available at any given time. Valid and error-free MongoDB C100DBA exam questions are given by the company on its site. To get this information you have to request it through the Contact Us page. Command line tools for this kind of work are provided by the company MongoDB to its users. The test base consists of 3-4 objectives, out of which only some are being tested in each exam cycle. Each objective is made up of questions that are directly linked to concepts tested in the previous exams.

The sources for these questions vary all over, including textbooks, online resources, courses, or any other resources that might help you in preparing for these exams. Error messages are generated in this way. Command line tools for this kind of work are provided by the company MongoDB to its users. There is no set time period in which the C100DBA exam is to be held. It can be held at any time, depending on the number of applicants and the percentage of questions asked in the exam. MongoDB C100DBA Dumps certifies that you will be well versed in working with different data types and the basics of the database, including code syntax, database creation, database usage by applications, security setup, data importation for MongoDB. And since you can take up to 4 exams within a year, there is no need to worry about trying to prepare for the C100DBA test too early in your career, or before you have completed all your prerequisites. This test is usually given every 6 months, but when there are many applicants it could be given earlier than that. Expect between 60 and 85 questions in each exam cycle.

NO.66 Which of the following commands can cause the database to be locked?

 All of the above

 Inserting data

 Map-reduce

 Issuing a query

NO.67 The difference between $push and $addToSet is:

 $addToSet needs the fields to be already present while $push will work even if the field is not present

 $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

 $addToSet adds the item to the field only if the new item is of the same datatype

 There is no major difference between them. $addToSet is a deprecated version of $push.

NO.68 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?

 db.posts.createIndex({commerits.$.author”:-l});

 db.posts.createIndex({comments.$.author”: {$desc:l>});

 db.posts.createIndex({comments.author”:-l});

NO.69 In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)

 Skip and limit nullify each other. Hence returning the first five documents

 Limits the first five documents and then return them in reverse order

 Skips the first five documents and returns the sixth document five times

 Skips the first five documents and returns the next five

NO.70 Which of the following is incorrect statement about find and findOne operations in MongoDB?

 findQ returns all the documents in a collection while findOne() retrieves only the first one.

 find.limit(l) is not the same query as findOne()

 findOneQ returns the actual first document retrieved from a collection

 findQ and findOneQ returns cursors to the collection documents

NO.71 Which command is used to determine storage capacity of specific database?

 mongotop

 dbstats

 mongostat

 constats

NO.72 What is the first task that a secondary would perform on being prompted by another secondary for an election?

 Start the election process for primary

 Vote for the first secondary so that it would become the next primary

 Vote for itself and then call for election

 Connect to primary to confirm its availability

NO.73 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?

 db.population.aggregate( [{ $group: { _id: { state: “$state”, city: “$city” },pop: { $pop: 1 } } }] )

 db.population.aggregate( [{ $group: { _id: { city: “$city” },pop: { $sum: “$pop” } } }] )Multi Document Transaction is not supported by MongoDB

 db.population.aggregate( [{ $group: { _id: { state: Estate”, city: “$city” },pop: { $sum: “$pop” } } }] )

 db.population.aggregate( [{ $group: { _id: { state: Estate”, city: “$city” },pop: { $sum: 1 > > >] )

NO.74 Which of the following is true about sharding?

 Creating a sharded key automatically creates an index on the collection using that key

 We cannot change a shard key directly/automatically once it is set up

 A sharded environment does not support sorting functionality since the documents lie on various mongod instances

 Sharding is enabled at the database level

NO.75 Which of the following is correct about MongoDB?

 MongoDB supports geospatial indexes

 MongoDB supports some of the SQL functions

 MongoDB uses JSON format to represent documents

 MongoDB supports collection joins

NO.76 What is the maximum size of a MongoDB document

 16 MB

 12 MB

 2 MB

 There is no maximum size. It depends on the RAM.

NO.77 Which of the following commands will return all the posts with number of likes greater than 100 and less than
200, both inclusive?

 db.posts.find({ likes : { $gte : 100 , $lte : 200 } } );

 db.posts.find({ likes : { $gt : 100 , $lte : 200 } } );

 db.posts.find({ likes : { $gte : 100, $lt : 200 } } );

 db.posts.find({ likes : { $gt : 100, $lt : 200 > > );

NO.78 Which of the following statements are true about the $match pipeline operator? Check all that apply.

 You should use it early as possible in the pipeline

 It can be used as many time as needed.

 It has a sintax similar to findQ commands.

NO.79 Which of the following is supported by MongoDB?

 Transaction Management

 ACID Transactions

 Journaling

 Relationships between Collections (Primary Key Foreign Key)

NO.80 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.

 db.sample.update( { “_id” : 3 } , { “$set” : { “_id” : 7 , “c” : 4 > > )

 db.sample.update( { “_id” : 3 > , { “_id” : 7 , “c” : 4 > , { “justOne” : true > ) / This operation cannot be done with a single query.

 db.sample.update( { “_id” : 3 > , { “_id” : 7 , “c” : 4 , { “$unset” : [ “a” , “b” ] } } )

 db.sample.update( { “_id” : 3 > , { “_id” : 7 , “c” : 4 > )

NO.81 Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this important?

 To help in disaster recovery

 To protect agains network partitions

 To enable certain read preference settings

 To add greather redundancy

 For more efficient backup operations

NO.82 In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?

 Sharding

 Properly defined user roles

 Replication

 Put indexes on all of your documents

 The proper storage engine

NO.83 What is the output of the following program?

 60 s

 1s

 100 s

 100 ms

NO.84 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?

 db.inventory.find( { ratings: { $elemMatch: { $gte: 3, $lte: 6 } } } )

 db.inventory.find( { ratings: { $elemMatch: { $gt: 3, $lt: 6 }

 db.inventory.find( { ratings: { ratings.$: { $gt: 5, $lt: 9 } } } )

 db.inventory.find( { ratings: { ratings: { $gt: 5, $lt: 9 } } } )

NO.85 Mongodb does provide high availability via which option?

 Replication

 Indexing

 Sharding

 Journaling

NO.86 What is the defau size of a GridFS chunk?

 255 K

 1 MB

 16 MB

 2 MB

NO.87 If you have created a compound index on (A,B, C) which of the following access pattern will not be able to utilize the index?

 A, B, C

 A

 B, C

 A, B

NO.88 In a sharded cluster, from which node does one stop the balancer process before initiating backup?

 Any node

 replicaset primary node

 config server node

 mongos node

NO.89 Which mongodb tool is used to report details on number of database operations in MongoDB?

 mongorestore

 mongostat

 mongodump

 mongotop

NO.90 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.

 As an optimized sort query (scanAndOrder = false) using “mylndex” because we are sorting on an indexed field

 As an indexed query using “mylndex” because field “user.login” is indexed

 MongoDB will need to do a table/collection scan to find matching documents

 None of the above

 As a covered query using “mylndex” because we are filtering out “_id” and only returning “user.login”

 Loading …

What are Some Things to Remember When Taking this Exam?

A lot of people say that MongoDB C100DBA test questions are easier than other database testing exams, but you really have to understand MongoDB in order to pass. I highly recommend that everyone take time after passing the exam and read through all of the sections of the official documentation. I believe that reading through it will help reinforce all of the knowledge that you learned while preparing for the exam. The testing engine is another great resource that can be used to study for the exam. It’s a good idea to come up with a plan, which includes setting aside time to study before you begin your preparation phase. It’s recommended that you set aside at least five hours a week and take an average of six practice exams. MongoDB C100DBA Dumps can help you with this because you can see how people are attempting to answer the questions and how they’re phrasing and organizing their answers. Confronting the exam will be a lot easier if you do so with friends who understand MongoDB and have experience taking SQL exams. The amount of time you should spend studying for the exam really depends on how much time you have available and how well you know MongoDB. One thing I’ve learned is to always try and do the best I can do each time I attempt an exam or practice test because doing so will help expand my knowledge and skills in the field of MongoDB C100DBA exam certification. The engine is also a great resource to use when preparing for this exam because it will show you how the exam is structured and what you need to know in order to pass.

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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