Practice data science & ML mock interviews with peers

Join thousands of data scientists and machine learning engineers practicing SQL interviews to land jobs. Practice real questions over video chat in a collaborative environment and get helpful feedback.

Join an upcoming session

Grab an open seat in a live peer mock interview. Filter by role to see what's coming up.

Or practice with AI immediately

Skip the wait — answer real interview questions with instant AI feedback, any time.

Asked at Airbnb

Tell me about a time you made a mistake.

Behavioral

Asked at Amazon

How do you consider the impact of your work on the world?

Behavioral

Asked at OpenAI

Design ChatGPT

System Design

Answered 40+ times this month

Maximum Subarray Sum

Data Structures & Algorithms

Asked at Youtube

Estimate the number of videos watched on YouTube per day.

Product Management

Asked at Amazon

Tell me about a time when you were dissatisfied with the status quo.

Behavioral

Asked at Meta

You're a PM at Meta. Why should Meta continue investing in Reels? What goals and metrics would you set?

Product Management

Answered 40+ times this month

Number of Paths

Data Structures & Algorithms

Asked at Meta

What goals would you set as PM for Facebook marketplaces?

Product Management

Asked at xAI

Design a rate limiter.

System Design

Asked at Patreon

Tell me about your past projects.

Behavioral

Asked at Google

How would you convince leadership to build a wristwatch for the elderly?

Product Management

Answered 40+ times this month

Flatten a Dictionary

Data Structures & Algorithms

Answered 50+ times this month

Find Largest Numbers

Data Structures & Algorithms

Asked at Amazon

Design Amazon's Kindle payment system.

System Design

Asked at Microsoft

Design a system to log messages in order

System Design

Who's using it

How everyone in tech prepares

Exponent Practice supports interview prep for everyone in tech. From product management to software engineering and data roles, there are thousands of practice questions to choose from.

How it works

How to schedule a practice session

Schedule a time: Join later today or pre-schedule an hour-long mock interview session that suits your availability, experience, and skills. Practice anytime that fits.
Get matched: Automatically match with data scientists and machine learning engineers preparing for the same interviews. Each match is picked just for you. Take turns role-playing as interviewer and interviewee.
Exchange feedback: Trade detailed notes with your partner using realistic rubrics after the session ends. Get honest, actionable feedback from your peer partner and our AI.

Why practice?

Gain confidence and get real results

Practice and receive feedback on both your technical and behavioral interviewing skills.

Match with serious, like-minded candidates who are actively improving their interview skills.

Deep dive into the most commonly asked interview questions in tech.

Testimonials

Join thousands of candidates using Exponent to practice and land their dream jobs.

Frequently asked questions

: Every day at pre-scheduled times, Exponent facilitates peer-to-peer mock interview sessions for tech roles.

Interviews are live one-on-one video calls hosted on our website, with a built-in shared code editor for technical interviews.

Exponent automatically matches you with peers based on your availability, practice needs, and interview objectives.

We manage the interview scheduling and supply potential questions. For technical questions, we'll also share hints, test cases, and the solution.

Each practice session is reciprocal: everyone takes turns as both the interviewee and interviewer.

Interviewing others is beneficial to you too! Being the interviewer provides insights into best interview practices.
: We support these roles and interview types:

Product Management: Product sense, estimation, product design, and analytical questions.
Data Structures & Algorithms: Coding questions that test fundamental CS concepts.
System Design: Design scalable systems and weigh trade-offs.
Behavioral: Work experience and culture-fit questions for all tech roles.
SQL: (Beta)
Data Science & ML: (Beta)
Frontend: (Beta)
: You can participate in an interview by joining at the last minute or scheduling it in advance.

To join last minute, return to this page ten minutes before the next scheduled session.

To schedule a peer-to-peer mock interview for later:

Click on "Schedule practice session" above.
Select an interview type: product management, behavioral, data structures & algorithms, or system design.
Choose a date, time, and difficulty level that first your schedule and prep needs.
Add the session to your calendar and receive automatic email reminders.
In the ten minutes before your start time, return to this page to begin your interview.
: This is our daily interview schedule. This is the time each mock interview session starts. Return to this page ten minutes before your scheduled time to join.

Product Management: 2 AM, 8 AM, 12 PM, and 6 PM Pacific Time.
Data Structures & Algorithms: Every two hours between 8 AM and midnight, local time.
System Design: 2 AM, 8 AM, 12 PM, and 6 PM Pacific Time.
Behavioral: 2 AM, 8 AM, 12 PM, and 6 PM Pacific Time.
SQL: 8 AM and 6 PM Pacific Time.
Data Science & ML: 6 AM and 4 PM Pacific Time.
Frontend: 6 AM and 4 PM Pacific Time.
: Yes, we will send you an email confirmation and reminders. You can add the session to your Google Calendar from the confirmation email or from the dashboard.
: Exponent's mock interview practice tool is free to use. Free users are allotted credits to practice every month. Members enjoy unlimited access.
: Pramp is now Exponent.

You can schedule the same types of mock interviews on Exponent as you could on Pramp, however you'll need an Exponent account.

If you have a Pramp account, click here to link your Exponent account.
: We'd love to hear your suggestions on how we can improve Exponent Practice. Reach out to us with comments, concerns, or ideas at [email protected].
: For Behavioral, Product Management, System Design, and Data Science & ML interviews, you'll receive an automatic transcript of your interview, and Exponent's AI will grade your interview according to realistic hiring rubrics that have been developed with best practices in mind. Your interview feedback will include a score for each attribute and a recommendation on how to improve your scores.

You'll be able to view this feedback alongside your peer feedback soon after your session is complete, and we'll send an email notification when it is ready.

Note: This feature is in early access and is currently only available for Exponent members. To unlock feedback and transcripts, you'll need to upgrade to a paid membership.

You have the option to opt-out from AI feedback at any time by updating your account settings.

Matching

: In most cases, we automatically match you with a suitable partner based on experience level and interview history.

If you get along well, you can use the Intro feature on your dashboard to exchange information with a previous partner. Stay in touch and continue practicing together!

If you want to practice with someone you know, you can use the Practice with a Friend feature.
: Our matching algorithm considers several factors to pair you with a suitable peer for practice, including your schedule and availability, current role, experience level, and interviewing history.
: Life happens!

If you're unable to attend your interview, please log in to your account and either cancel or reschedule it prior to the session start time.

You will have your interview credit returned to your account.

Interviewing

: Each interview involves you and your partner interviewing each other for approximately 30 minutes each, making the entire session about an hour long.

You will be connected via a video call. For Data Structures & Algorithms, SQL, and Frontend interviews, you will solve your question using a collaborative code editor. For all other interview types, suggested questions will be offered before and during the session.

Interviewer and interviewee roles are randomly assigned at the start of the interview, and you switch halfway through.

While interviews typically last an hour, you will have access to the video call for up to two hours. The interview will automatically end after this period.
: It depends on the interview type you select.

For Data Structures & Algorithms, SQL, and Frontend interviews, your peer will be preassigned a coding question to ask you.

For all other interview types, suggested questions will be offered before and during the session. These questions come from our database, which includes real-world questions seen by candidates in recent interviews.
: It depends on the interview type you select.

For Data Structures & Algorithms, SQL, and Frontend interviews, you will be preassigned a coding question to ask your partner. Usually, you are assigned a question you've already seen on Exponent Practice, so that you are already familiar with the problem. We strongly suggest practicing the question before your interview.

For all other interview types, suggested questions will be offered before and during the session. These questions come from our database, which includes real-world questions seen by candidates in recent interviews. You are also welcome to bring your own question or ask your partner what they would like to practice!
: We prioritize your privacy.

Only your public display name will be shared with your partner. (Your public display name can be updated on your Account page.)

During and after the interview, you can choose to exchange information with your practice partner. Doing so is a great way to stay in touch and continue practicing together!

We recommend leaving video on, but you also have the option to conduct the interview with audio only.
: Return to this page up to ten minutes before your scheduled start time. When the waiting room is open, an option to join will appear.

We'll also send you an email reminders ten minutes before your interview.
: The Data Structures & Algorithms, SQL, and Frontend mock interview types include a built-in collaborative code editor.

Data Structures & Algorithms interviews support popular programming languages like Python, JavaScript, Java, Go, C++, C, C#, Ruby, and Swift. SQL interviews support PostgreSQL and SQLite. Frontend interviews are in JavaScript.

Troubleshooting

: Our video chat uses a peer-to-peer video connection, which directly connects peers.

This means most issues typically result from browser support, permissions, or an unstable internet connection.

Ensure your browser has permission to access your camera and microphone. Ensure your browser has given Exponent permission to access your camera and microphone. Confirm that your browser supports WebRTC.

Troubleshooting Tips

Try refreshing the page, but avoid clicking "End Session."
Ensure your browser has permission to access your camera and microphone.
Ensure your browser has given the Exponent website permission to access your camera and microphone.
Run a test to check your browser's WebRTC support.
If you have multiple cameras or microphones installed, your browser or operating system may be using the wrong one. Check and adjust if needed.
Close all browser windows and restart your browser application.
If another app or browser is using the camera, quit the application or restart your computer.
If your connection is slow, consider using a wired connection instead of WiFi.

If the above suggestions don't resolve your issue, please email us at [email protected]
: Yes, you can disable your video during calls. However, we recommend leaving it on to receive feedback on your soft skills!
: We require recent versions of Chrome, Safari, Firefox or Edge. Other browsers may work, but we don't officially support them.
: We don't support mock interviewing on mobile devices. Many features in our mock interview tool are designed for desktop use.

Practice data science & ML mock interviews with peers

Join an upcoming session

Or practice with AI immediately

Who's using it

How it works

Why practice?

Testimonials

Frequently asked questions

Matching

Interviewing

Troubleshooting

Follow Us