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."
Validate word abbreviation and reconcile two abbreviations
Validate word abbreviation and reconcile two abbreviations Implement a function isValidAbbreviation(word: string, abbr: string) that returns true if a...
Explain core ML fundamentals
Explain core ML fundamentals Machine Learning Fundamentals: Regularization, Losses, PCA, and Random Forests Assume standard supervised learning with l...
Demonstrate Bias for Action
Demonstrate Bias for Action Behavioral Prompt: Acting With Incomplete Data (Bias for Action) Describe a time you moved a project forward despite havin...
Merge overlapping intervals
Merge overlapping intervals Given a list of half-open numeric intervals [start, end), merge all overlapping or contiguous intervals and return a list ...
Find first unique character
Find first unique character Given a lowercase/uppercase alphanumeric string s, return the index of the first character that appears exactly once; if n...
Annotating and forecasting a long‑tail distribution
Annotating and Forecasting a Long-tail Distribution You are analyzing daily share counts across many pages on a social platform. The cross-sectional d...
Expected round of first selection in repeated sampling
Random Perk Selection: Expected First Round There are 1,000 employees. Each round, 10 distinct employees are selected at random for a perk. No one can...
Expected meetings in Room 1 after random assignment
Expected Meetings in Room 1 Conditional on Being Non-empty There are N rooms and k meetings. Each meeting independently chooses a room uniformly at ra...
Quality and frequency control for push notifications
Push Notifications: Quality, Overload Mitigation, and Per-user Caps You are a data scientist working on push notifications for a consumer app. Pushes ...
Evaluate the Success of Instagram Checkout
Evaluating Instagram Checkout Instagram Checkout allows users to discover products, add to cart, pay, and manage post-purchase flow without leaving In...
Impact of parents joining Facebook on teen engagement
Parental Presence and Teen Engagement on Facebook Facebook's teen audience overlaps increasingly with parents, who may friend their children, comment ...
Consider Key Factors Before Launching New Credit Card
New Credit Card Launch: Factors to Assess A retail bank is considering launching a new general-purpose consumer credit card. You are asked to outline ...
Describe Leading Without Authority in Data Management
Behavioral Interview: Leading Without Authority in Data Management You will be assessed on cultural fit and how you operate in ambiguous, messy data e...
Identify Users with Specific Page Visit Sequence
page_visits +------------+---------+---------+----------+ | date | user_id | page_id | ts | +------------+---------+---------+----------+ ...
Design Efficient Multi-Level Access Control System
Scenario Multi-level access control lists (country → city) must be queried quickly. Question Design and implement a permission system where each geogr...
Implement Data Structure for Top-K Elements in Streams
Scenario Analytics feature that must constantly report the K largest numbers seen so far. Question Implement a data structure that ingests a stream of...
Assess Customer Value with Varied Contract Terms and Costs
Subscription Network Service: Customer Value and Contract Terms A subscription network-service provider wants to assess unit economics and portfolio i...
Identify and Flag Bot Traffic in Online Forum
PVE +----------+-----------+ | memberId | timestamp | +----------+-----------+ | 101 | 169100123 | | 102 | 169100225 | | 101 | 16910030...
Calculate Weekly, Monthly Watch Hours for Paid Users
video_view_logs +---------+----------+----------------+------------+------------+ | user_id | video_id | watched_seconds| watch_date | device_type| +-...
Identify First Daily Order for Each Merchant
Orders +----------+-------------+---------+------------+ | order_id | merchant_id | amount | order_date | +----------+-------------+---------+-------...