Machine Learning Engineer + Data Scientist + Software Engineer Interview Questions
Practice the exact questions companies are asking right now.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Design multi-region banking data synchronization
System design: Global bank with multi-region data consistency A digital bank operates in multiple geographic regions (e.g., EU, US, APAC). Users can l...
Design a Slack-Like Messaging System
This question evaluates a candidate's ability to architect a real-time team messaging platform, testing competencies in distributed systems, data mode...
Find and Count Maximum-Score Grid Paths
Find the maximum-scoring path from a fixed top-row cell to the last row of a grid using diagonal, downward, and limited two-row jump moves. Return the...
Design a Cloud File Storage and Sync Service (Google Drive)
This question asks for the end-to-end design of a cloud file storage and sync service, evaluating a candidate's grasp of distributed systems fundament...
Design a REST API Abstraction Layer
Design a REST API Abstraction Layer (Internal Service-Client SDK) A company runs many application servers that call internal REST services. Today, eve...
Validate a Third-Party Identity Payload
Validate a Third-Party Identity Payload A third-party service returns a JSON payload with a fixed documented structure. The first subject contains a V...
Navigate Conflict, Compromise, and a Revealed Weakness
Navigate Conflict, Compromise, and a Revealed Weakness Prepare a coherent behavioral answer set about how you work with other engineers and with your ...
Design a Pre-Trade Risk Check for an Electronic Order Path
Design a Pre-Trade Risk Check for an Electronic Order Path Design a pre-trade risk-checking service for an electronic trading path. A strategy submits...
Trace Virtual Address Translation Through TLBs, Page Tables, and Caches
Trace Virtual Address Translation Through TLBs, Page Tables, and Caches Explain how a CPU translates a virtual address to a physical address in a page...
Describe Using AI at Work
This question evaluates AI literacy, communication of technical impact, ethical judgment about safeguards, and the ability to quantify business or eng...
Analyze the Fairness of an Incremental Shuffle
Consider the following function, where random() returns an independent value uniformly distributed in [0, 1) on every call: `javascript function shuff...
Mine Novel Images from Unlabeled Data
Design a machine learning system that mines novel or interesting images from a massive, unlabeled image corpus. The corpus is far too large for exhaus...
Investigate a 7% Monthly Active Riders Drop and a 20% Wait-Time Increase
This question evaluates a data scientist's ability to diagnose simultaneous metric regressions in a marketplace product using structured root-cause an...
Evaluate a New Ads-Ranking Algorithm
Evaluate a New Ads-Ranking Algorithm An ads team has developed a new ranking algorithm that chooses which ad to show for each eligible opportunity. En...
Explain Your Motivation, Fit, and Company Understanding
Prepare concise answers for a recruiter screen for a senior forward-deployed engineering role. Your answers must be specific to your real experience a...
Predict bike demand and avoid overfitting
You are given historical data for a city bike-sharing system. Available fields include station_id, hourly timestamp, number of bike pickups and return...
Design a Personalized Content Recommendation Engine
This question evaluates a candidate's ability to design a large-scale personalized recommendation system, covering problem framing, candidate retrieva...
Design a Food Delivery Cart
This question evaluates competency in designing stateful, user-facing subsystems including data modeling, API design, session persistence, caching, co...
Discuss Complex Systems and Failure Examples
This question evaluates technical depth in designing and operating complex distributed and security-adjacent cloud systems, leadership and ownership d...
Analyze User Ride Activity with SQL
Use the following tables to answer four SQL analysis tasks. `text rides(ride_id, ride_date, ride_rating, user_id) users(user_id, city) ` Constraints &...