MongoDB LinkedIn Assessment Test Answers

MongoDB LinkedIn Assessment Test Answers 2023
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MongoDB LinkedIn Assessment Test Answers  : Are you Looking for  MongoDB LinkedIn Assessment Test Answers  Today in This article i will show You  MongoDB LinkedIn Assessment Test Answers 2023.

How to Pass LinkedIn Assessment Test with High Score

 MongoDB LinkedIn Assessment Test Answers  : A decent method for knowing whether you are ready for evaluation is by tapping on the ability you need to test in the appraisal test segment, and there will be a portrayal of the aptitudes that the test will survey. This way you can know whether there’s a piece of the product you really want to investigate or a piece of the programming language strategies you really want to brush over assuming you feel your insight is running somewhat corroded.

Know your industry

 MongoDB LinkedIn Assessment Test Answers  : The tests are accessible for checking a wide scope of abilities, from programming abilities to essential realistic planning abilities. You really should show your capability that is connected with the business you are focusing on. Assuming you are searching for a profession in finance, dominating in Adobe Photoshop won’t help you however much an identification announcing your solidarity in Microsoft Excel will. You additionally need to expand your capability as your experience develops, as selection representatives would expect an alumni with 3 years of work insight to show a more extensive scope of abilities than somebody recently out of school.

How to Take LinkedIn Assessment Test with Guaranteed Passing Score

 MongoDB LinkedIn Assessment Test Answers  : Step by step instructions to Pass LinkedIn Assessment Test: When you at long last focus on getting another line of work, it tends to be overwhelming. The possibility of leaving the past behind and entering the obscure, practically everything associated with the talking system, and on top, all things considered, maybe the pressure of a transition to another city. You stress over having sufficient opportunity to make a quality showing planning for interviews so you can adequately impart your range of abilities. Debilitating.

However, your abilities might have quite recently been given a bull horn. On September 17, LinkedIn sent off an intriguing new instrument on their foundation called “LinkedIn Skill Assessments.” It’s basically another way for you to approve your abilities and better stand apart from the group.

 MongoDB LinkedIn Assessment Test Answers : This is The way to Pass LinkedIn Assessment Test. You complete a thoroughly evolved web-based appraisal (planned by LinkedIn Learning and informed authorities) for an ability region you need to show capability in, similar to Adobe Photoshop for instance. Assuming you pass the evaluation, you’re given an identification that will be shown on your profile in LinkedIn Recruiter and LinkedIn Jobs.

This will assist employers with rapidly distinguishing who has the particular abilities they’re searching for and assist you with securing position postings pertinent to your recognized range of abilities. Indeed, LinkedIn says for the people who breeze through an evaluation assessment, they’re then, at that point, sent significant work postings the moment they’re posted. Assuming you don’t pass the evaluation, nobody will know.

LinkedIn says that up-and-comers who finished LinkedIn Skill Assessments are fundamentally almost certain (around 30%) to get recruited.

Why the LinkedIn Skill Assessments Tool May Help You Find a Job

 MongoDB LinkedIn Assessment Test Answers  : Expanding your odds of finding a new line of work by 33% is clearly a considerable lift. Candidates likewise get a method for affirming their capability in an ability. LinkedIn research shared as a feature of the apparatus declaration shows 68% of individuals need to check their ability in an expertise prior to going after a position, and 76 percent wish there was a way an ability could be confirmed so they could tolerate outing according to a likely boss.

The production of identifications gamifies abilities evaluation and gives a strong obvious signal of a task applicant’s capabilities. Think about this — assuming you were going after a position in money and there was an “dominate wizard” identification, how might you feel in the event that your companion, who you knew was applying to, had that identification on their profile, however you didn’t?

Selection representatives win as well. I have been in a recruiting job commonly and at least a few times have employed somebody professing to have specific abilities — which ended up being a leap of faith. Indeed, there are ability check tests you can get expected possibility to take however they’re costly, tedious, and hazard switching off competitors who are sublimely qualified and possess a great deal of the abilities they guarantee.

Obviously, LinkedIn wins incredibly too. The badging framework makes further commitment with their foundation (for example individuals will invest more energy on the stage, which is great for LinkedIn as far as building a propensity) and it could very well expand the worth according to the client for involving the stage for the pursuit of employment by and large.

Assuming you take an abilities evaluation yet don’t pass, LinkedIn then, at that point, offers you designated learning courses to assist you with looking over your abilities so you can pass that appraisal the following time and feel more certain and in charge of future work possibilities.

On the opposite side of the coin, a ton of truly qualified individuals won’t take the abilities evaluation and get an identification. So without the identification, despite the fact that they’re qualified, they’ll be in a difficult spot (versus the people who set aside the effort to pass the appraisal and get an identification). In this manner, it may cause individuals to feel compelled to get the identification, which makes it a more elaborate interaction to involve LinkedIn as a task stage. I can see that switching off some likely clients. Also some portion of me contemplates whether the appraisals will be made somewhat excessively hard — consequently setting off the acquisition of a course to help as a general rule. I additionally keep thinking about whether individuals will feel constrained to “identification gather” presently, eventually watering down the effect of the appraisal checks.

We’ll perceive how much and how quick the expertise appraisal and confirmation apparatus takes off for LinkedIn. In any case, one thing is for sure, it’s an intriguing new choice for breaking out of the messiness.

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 MongoDB LinkedIn Assessment Test Answers 2022

Q1. Which command adds members to the replica set from MongoDB shell?

 

  •  rs.add(“<hostname>”)
  •  replicaSetAdd(“<hostname>”)
  •  rs.insert(“<hostname>”)
  •  replica.add(“<hostname>”)

 

Q2. Which MongoDB shell command should you use to back up a database?

 

  •  restore
  •  backup
  •  mongobackup
  •  mongodump

 

Q3. Which shell query displays all citizens with an age greater than or equal to 21?

  •  db.citizens.select(‘WHERE age >= 21’)
  •  db.citizens.where(‘age >= 21’)
  •  db.citizens.find(‘WHERE age >= 21’)
  •  db.citizens.find({age: {$gte: 21}})

 

Q4. What does a MongoDB collection consist of?

 

  •  data
  •  documents
  •  fields
  •  rows

 

Q5. Given an ObjectId in _id, how do you get the time it was created?

 

  •  getDateTime(_id)
  •  _id.createDate()
  •  _id.getTimestamp()
  •  _id.getDateTime()

 

Q6. Given a cursor named myCursor, which command returns a boolean value?

 

  •  myCursor.hasNext()
  •  myCursor.sort()
  •  myCursor.next()
  •  myCursor.find()

 

Q7. Which command returns a specific document in the user’s collection?

 

  •  db.users.find({_id: 1})
  •  db.users.seek({_id: 1})
  •  db.users.query({_id: 1})
  •  db.query.users({_id: 1})

 

Q8. To import a JSON array into Mongo, what flags are needed with MongoDBimport?

 

–type jsonArray

–json

–type json

-jsonArray

 

Q9. Choose the shell command that connects to a MongoDB database.

 

  •  mongo
  •  mongod
  •  mongoconnect
  •  dbconnect

 

Q10. In the MongoDB shell, how can you tell if an index was used with a query?

 

  •  db.customers.find({lastName: ‘smith’}).explain()
  •  db.customers.find({lastName: ‘smith’}).perf()
  •  db.customers.find({lastName: ‘smith’}).plan()
  •  db.customers.find({lastName: ‘smith’}).usedIndex()

 

Q11. Suppose your aggregation pipeline terminated with an exception referring to exceeded memory limit. What is the best way to resolve the issue?

 

  •  Set useMemory to twice amount indicated in exception.
  •  Switch a 64 bit instance of MongoDB.
  •  Increase the memory of the MongoDB server.
  •  Set allowDiskUse to true.

 

Q12. What is the recommended way to delete a user?

 

  •  db.deleteUser(“user”)
  •  db.removeUser(“user”) DEPRECATED
  •  db.remove(“user”)
  •  db.dropUser(“user”)

 

Q13. What the primary database in a replica set fails, when does failover begin?

 

  •  once the primary has been down for 10 minutes
  •  once the primary reboots
  •  immediately
  •  after the administrator reboots the primary

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Q14. What is the correct option to set up Kerberos when starting MongoDBd?

 

  •  –setParameter authenticationMechanisms=GSSAPI
  •  –setAuthentication=GSSAPI
  •  –setParam auth=K
  •  –setAuth method=Kerberos

 

Q15. What is the purpose of an arbiter in a replica set?

 

  •  It monitors replica set and sends email in case of failure
  •  It casts the tie-breaking vote in an election.
  •  It holds a backup copy of the database.
  •  It reboots the failed server.

 

Q16. You want to know how many types of items you have in each category. Which query does this?

 

  •  db.product.group({_id: “$category”, count: {$sum:1}})
  •  db.product.aggregate($sum: {_id: “$category”, count: {$group:1}})
  •  db.product.aggregate($group: {_id: “$category”, count: {$sum:1}})
  •  db.product.aggregate($count: {_id: “$category”, count: {$group:1}})

 

Q17. To restrict the number of records coming back from a query, which command should you use?

 

  •  take
  •  limit
  •  max
  •  skip

 

Q18. You have a collection named restaurants with the geographical information stored in the location property, how do you create a geospatial index on it?

 

  •  db.restaurants.CreateIndex({location: “2dsphere”})
  •  db.restaurants.geospatial({location: “2dsphere”})
  •  db.restaurants.CreateIndex(“2dsphere”:”location”)
  •  db.restaurants.CreateIndex({geospatial: “location”})

 

Q19. How do you find documents with a matching item in an embedded array?

 

  •  db.customers.findmatch ({“jobs”:”secretary”})
  •  db.customers.find ({“jobs:secretary”})
  •  db.customers.find ({“jobs”:[“secretary”]})
  •  db.customers.find ({“jobs”:”secretary”})

 

Q20. Which query bypasses the first 5 customers and returns the next 10?

 

  •  db.customers.find({}, {skip: 5, limit: 10})
  •  db.customers.find({}.page(5).take(10))
  •  db.customers.find({}).skip(5).take(10)
  •  db.customers.find({}).skip(5).limit(10)

 

Q21. How do you create a text index?

 

  •  db.customers.createIndex({firstName, lastName})
  •  db.customers.createTextIndex({firstName, lastName})
  •  db.customers.createIndex({firstName: “text”, lastName: “text”})
  •  db.customers.createText({firstName: 1, lastName: 1})

 

Q22. Assuming you have customers collection with a firstName and lastName field, which is the correct MongoDB shell command to create an index on lastName, then firstName both ascending?

  •  db.customers.createIndex(“lastName, firstName, ASC”)
  •  db.customers.addIndex({lastName:”ASC”, firstName: “ASC”})
  •  db.customers.newIndex({lastName:1, firstName:1})
  •  db.customers.createIndex({lastName:1, firstName: 1})

Q23. One of the documents in your collection has an _id based upon an older database design and you want to change it. You write an update command to find the document and replace the _id but the _id isn’t changed. How should you fix the issue?

 

  •  Set the replace option to true.
  •  Use the replaceOne() command instead.
  •  You can’t. Once set, the _id field cannot be changed.
  •  Use the updateOne() command instead.

 

Q24. A compound index allows you to ___ ?

 

  •  Calculate interest quickly.
  •  Accomplish nothing, since compound indexes aren’t allowed in Mongo.
  •  Use more than one field per index.
  •  Combine fields in different collations.

 

Q25. Why are ad-hoc queries useful?

 

  •  They do not have to use the same operators.
  •  You do not need to structure the database to support them.
  •  They autogenerate reports.
  •  They run faster than indexed queries.

 

Q26. How often do the members of a replica set send heartbeats to each other?

 

  •  every 2 minutes
  •  every 5 seconds
  •  every 2 seconds
  •  every 10 seconds

 

Q27. Which command returns all of the documents in the customers collection?

 

  •  db.customers.all();
  •  db.find().customers();
  •  db.customers.find();
  •  db.customers.show();

 

Q28. Given a cursor named myCursor, pointing to the customers collection, how to you get basic info about it?

 

  •  myCursor.stats()
  •  myCursor.dump()
  •  myCursor.info()
  •  myCursor.explain()

 

Q29. What is true about indexes?

 

  •  They speed up read access while slowing down writes.
  •  They secure the database from intruders.
  •  They speed up reads and writes.
  •  They speed up write access while slowing down reads.

 

Q30. What is the preferred format to store geospatial data in MongoDB?

 

  •  Latitude, longitude
  •  XML
  •  GeoJSON
  •  BSON

 

Q31. Which programming language is used to write MongoDB queries? (Alternative: In the MongoDB shell, what programming language is used to make queries?)

 

  •  Python
  •  JavaScript
  •  SQL
  •  TypeScript

 

Q32. You have two text fields in your document and you’d like both to be quickly searchable. What should you do?

 

  •  Create a text index on each field.
  •  MongoDB is not able to do this.
  •  Create a compound text index using both fields.
  •  Create a text index on one field and a single field index on the other.

 

Q33. To import a CSV file into MongoDB, which command should you issue?

 

  •  mongorestore
  •  mongoi
  •  upload
  •  mongoimport

 

Q34. In an MongoDB mapReduce command, the reduce function should ____.

 

  •  access the database
  •  be called only when the key has a single value
  •  access the database only to perform read operations
  •  not access the data

 

Q35. On a newly created collection, which field will have an index?

 

  •  the name field
  •  the ObjectId field
  •  the _id field
  •  no field will have an index

 

Q36. You have a collection of thousands of students. You’d like to return the second set of 20 documents from the sorted collection. What is the proper order in which to apply the operations?

 

  •  limit, skip, sort
  •  sort, limit, skip
  •  limit, sort, skip
  •  sort, skip, limit

 

Q37. You would like the stats() command to return kilobytes instead of bytes. Which command should you run?

 

  •  db.vehicle.stats(1024)
  •  db.vehicle.stats(“kilobytes”)
  •  db.vehicle.stats(true)
  •  db.vehicle.stats(“kb”)

 

Q38. You want to modify an existing index. What is the best way to do this?

 

  •  Use the reIndex() command to modify the index.
  •  Delete the original index and create a new index.
  •  Call the createIndex() command with the update option.
  •  Use the updateIndex() command.

 

Q39. You need to delete the index you created on the description field. Which command will accomplish this?

 

  •  db.vehicle.dropIndex(“description_text”)
  •  db.vehicle.dropIndex({“description”:”text”})
  •  db.vehicle.removeIndex({“description”:”text”})
  •  db.vehicle.removeIndex(“description_text”)

 

Q40. You would like to know how many different categories you have. Which query will best get the job done?

 

  •  db.vehicle.distinct(“category”)
  •  db.vehicle.unique(“category”)
  •  db.vehicle.distinct(“category”).count()
  •  db.vehicle.distinct(“category”).length

 

Q41. From the MongoDB shell, how do you create a new document in the customers collection?

  •  db.customers.add({name: “Bob”})
  •  db.customers.save({name: “Bob”})
  •  db.customers.create({name: “Bob”})
  •  db.customers.new({name: “Bob”})

 

Q42. Which field is required of all MongoDB documents?

 

  •  _id
  •  _name
  •  ObjectId
  •  mongoDB is schema-less so no field is required

 

Q43. A MongoDB instance has at least what three files?

 

  •  data, namespace, and journal
  •  namespace, journal, and log
  •  journal, data, and database
  •  data, log, and journal

 

Q44. You’d like a set of documents to be returned in last name, ascending order. Which query will accomplish this?

 

  •  db.persons.find().sort({lastName: -1}}
  •  db.persons.find().sort({lastName: 1}}
  •  db.persons.find().sort({lastName: ascending}}
  •  db.persons.find().sort({lastName: $asc}}

 

Q45. What is NOT a standard role in MongoDB?

 

  •  restore
  •  read/write
  •  dbadmin
  •  delete collections

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Q46. Which MongoDB shell command deletes a single document?

 

  •  db.customers.delete({_id: 1});
  •  db.customers.drop({_id: 1});
  •  db.drop.customers({_id: 1});
  •  db.customers.remove({_id: 1});

 

Q47. Using the MongoDB shell, how do you remove the customer collection and its indexes?

 

  •  db.customers.remove({}).indexes();
  •  db.customers.remove({});
  •  db.customers.drop();
  •  db.customers.delete();

 

Q48. By default, applications direct their read operations to which member of the replica set?

 

  •  primary
  •  arbiter
  •  secondary
  •  backup

 

Q49. You need to get the names of all the indexes on your current collection. What is the best way to accomplish this?

 

  •  db.people.getName();
  •  db.people.reIndex({names: 1});
  •  db.people.getIndexKeys();
  •  db.people.getIndexes();

 

Q50. You are going to do a series of updates to multiple records. You find setting the multi option of the update() command too tiresome. What should you do instead?

 

  •  Use the replaceMany() command instead
  •  Use the updateMulti() command instead
  •  Use the updateMany() command instead
  •  Set the global multi option to True

 

Q51. To cleanly shut down MongoDB, what command should you use from the MongoDB shell?

 

  •  quit()
  •  exit()
  •  db.shutdownServer()
  •  db.shutdown()

 

Q52. Given a customer collection which includes fields for gender and city, which aggregate pipeline shows the number of female customers in each city? (Alternative: How can you view the execution performance statistics for a query?)

 

  •  db.members.aggregate([ {$match: {gender: “Female”}}, {$group: {_id: {city: “$city”}, number: {$sum: 1}}}, {$sort :{number: -1}}])
  •  db.members.find({$match: {gender: “Female”}}, {$group: {\_id: {city: “$city”}, number: {$sum: 1}}}.$sort ({number: -1})
  •  db.members.find([ {$match: {gender: “Female”}}, {$group: {_id: {city: “$city”}, number: {$sum: 1}}}, {$sort :{number: -1}}])
  •  db.members.aggregate([ {$match: {gender: “Female”}}, {$sort :{number: -1}}])

 

Q53. When no parameters are passed to explain(), what mode does it run in?

 

  •  wireTiger mode
  •  executionStats mode
  •  queryPlanner mode
  •  allPlansExecution mode

 

Q54. What is the correct query to find all of the people who have a home phone number defined?

 

  •  db.person.find({exists: ‘homePhone’});
  •  db.person.exists({homePhone: true});
  •  db.person.find({homePhone: {$exists: true}});
  •  db.person.has(‘homePhone’);

 

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