Get 25% off all test packages.

MongoDB Tests

    • 20 tests |
    • 285 questions

Master MongoDB: Elevate your database game for top-notch performance!

Prepare yourself for leading employers

Sample MongoDB Assessments question Test your knowledge!

What does it mean when a MongoDB query's explain output shows an 'IXSCAN' for a query on a collection with an appropriate index?

  • The query optimizer selected a collection scan over an index scan.
  • The query is utilizing an index to scan the documents.
  • The query bypassed MongoDB’s query planning mechanism entirely.
  • The index on the collection is missing, prompting a full collection scan.

Given a collection 'transactions' in MongoDB, which query will find all documents where the 'status' field is 'pending' and sort the results by the 'created_at' field in descending order?

  • db.transactions.find({ status: 'pending' }).sort({ created_at: -1 })
  • db.transactions.find({ status: 'pending' }, { sort: { created_at: -1 } })
  • db.transactions.find({}, { status: 'pending' }).sort('created_at', -1)
  • db.transactions.findAll({ status: 'pending' }).orderBy('created_at desc')
  • db.transactions.query({ status: 'pending' }).descending('created_at')

What is the result of calling the 'aggregate()' function with a pipeline that includes a '$group' stage on a MongoDB collection?

  • It returns the updated documents as they are being processed in the pipeline.
  • It generates a runtime error unless accompanied by a '$match' stage.
  • It transforms the collection into a set of aggregated results based on the specified criteria.
  • It creates a permanent grouping in the database that persists beyond the life of the query.
  • It duplicates the collection and applies the grouping to the duplicate only.

How would you ensure that every document inserted into a 'users' collection in MongoDB has a unique 'email' field?

  • db.users.addConstraint({ email: 1 }, { unique: true })
  • db.users.createIndex({ email: 1 }, { unique: true })
  • db.users.ensure({ email: { $unique: true } })
  • db.users.collection.setUnique('email')
  • db.users.duplicateCheck({ email: 'unique' })

When using MongoDB's 'findAndModify' method to update a document, what is the purpose of the 'new' option when set to true?

  • It creates a new document if no document matches the query.
  • It returns the modified document rather than the original document.
  • It forces the operation to create a new field in the document being modified.
  • It ignores any fields in the document that are not included in the modification.
  • It applies the changes to all documents matching the query, not just the first one.

Which MongoDB feature allows you to execute JavaScript functions on the database server?

  • Stored Procedures
  • Server-side Execution
  • MapReduce Functions
  • Database Triggers
  • Client-side Rendering

Start your success journey

Access one of our MongoDB tests for FREE.

Within two hours of practice I have improved my score from 50% correct to 88%.

Joseph used Practice Aptitude Tests to improve his numerical reasoning scores.

testimonial
Neuroworx

Hire better talent

At Neuroworx we help companies build perfect teams

Join picked Try Neuroworx today

MongoDB Assessments Tips

1Understand the Fundamentals

Ensure you have a solid grasp of MongoDB basics: database structures, collection methods, indexing, and more.

2Practice Makes Perfect

Regular practice is key. Dive into our free tests at Practice Aptitude Tests to mimic real exam conditions and enhance your proficiency.

3Focus on Performance

Learn how to optimize MongoDB performance. This can be a defining skill during assessments.

4Refresh Your Knowledge

Review MongoDB’s documentation regularly to stay updated with the latest features and best practices.

5Real-world Scenarios

Enrich your study regimen with practical scenarios. Understanding real-world applications can offer significant advantages during tests.

Improve your hiring chances by 76%

Prepare for your MongoDB Assessments

Immediate access. Cancel anytime.

Pro

Pay Annually
Pay Monthly
--- --- ---
  • 20 Aptitude packages
  • 59 Language packages
  • 110 Programming packages
  • 39 Admissions packages
  • 48 Personality packages
  • 315 Employer packages
  • 34 Publisher packages
  • 35 Industry packages
  • Dashboard performance tracking
  • Full solutions and explanations
  • Tips, tricks, guides and resources

Basic

---
  • Access to free tests
  • Basic performance tracking
  • Solutions & explanations
  • Tips and resources

MongoDB Assessments FAQs

What is covered in these tests?

The MongoDB tests focus on various technical aspects of working with MongoDB, such as database design, data modeling, CRUD operations, indexing, performance tuning, replication, sharding, and security practices.

How do I prepare for MongoDB tests?

To prepare for MongoDB tests, build a strong foundation in the fundamental concepts, engage with practical exercises, and explore as much hands-on experience with the database as possible.

Will these tests help me find a job?

Yes, these tests are designed to measure and showcase your MongoDB skills, which are highly sought after by employers in the technology sector.

How do employers use these tests?

Employers use these tests to gauge a candidate’s ability to perform essential tasks and solve problems using MongoDB, ensuring they are hiring individuals with the right technical skills.

Where can I practice free MongoDB test questions?

You can practice free MongoDB test questions at Practice Aptitude Tests, where a variety of questions are available to help you prepare and excel in your MongoDB knowledge.