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."
Define metrics for harmful-content severity
Context You are a Data Scientist on the integrity / harmful-content team for a large social media product. Leadership wants a way to track how bad pol...
Apply commands to transform a matrix
You are given an integer matrix A of size n × m and a list of string commands to apply in order. Implement the commands and return the final matrix. C...
Compute value of card guessing game
This question evaluates probabilistic reasoning, expected-value computation, sequential decision-making, and the ability to reason about optimal strat...
Implement a Timed Task Scheduler
Implement a runnable task scheduler. The scheduler should allow clients to add new tasks at any time. Each task has: - A callback or function to execu...
Write Queries for Pinterest Engagement Tasks
You are given several data-manipulation tasks based on Pinterest-style product data. Use UTC for all timestamp-to-date conversions unless stated other...
How would you build UberEats ranking?
This question evaluates machine learning and recommender-systems competencies for ranking in a food delivery marketplace, covering problem formulation...
How would you evaluate UberEats growth?
This question evaluates product analytics, experimentation design, and causal inference competencies in the context of a food-delivery marketplace, em...
Design a multi-tenant course purchase and delivery system
This question evaluates a candidate's skills in designing scalable multi-tenant architectures, covering data modeling for tenants, organizations, and ...
Maximize minimum value after k decrements
This question evaluates array-based optimization skills, resource-allocation reasoning under a fixed decrement budget, and algorithmic complexity anal...
Design a weapon-ad harmful content detection system
This question evaluates skills in end-to-end system design and applied machine learning for multi-modal harmful content detection, covering scalabilit...
Evaluate query ratios from equations
This question evaluates a candidate's skill in modeling variable ratios as relational structures, reasoning about transitive numeric relationships, an...
Solve string transform and min-move sorting
This two-part problem evaluates string manipulation and algorithmic problem-solving competencies, specifically rule-based text transformation and comp...
Solve matrix groups and recipe inventory
This pair of problems evaluates block-wise grid processing and aggregation for minimum-value selection alongside dependency-resolution and resource-al...
Compute unique-substring length and first unique index
This question evaluates proficiency in string processing and character-frequency reasoning by combining tasks that measure longest distinct-character ...
Find k-th smallest subarray sum
This question evaluates algorithmic problem-solving skills in array processing, specifically understanding of subarray sum properties, selection and r...
Bracket substrings matching any pattern
This question evaluates string manipulation and pattern-matching competency, including substring search, prioritization rules for leftmost and longest...
Solve linked list, grid BFS, and median queries
This multi-part question evaluates proficiency in in-place linked list manipulation, reasoning about shortest connections between connected components...
Solve sliding window, heap, DP, in-place tasks
This set evaluates proficiency with core algorithmic patterns—sliding-window techniques, heap-based top-k selection, dynamic programming for unbounded...
Merge collinear overlapping 2D segments
This question evaluates computational geometry skills, numerical robustness, and algorithmic implementation for merging collinear, overlapping 2D segm...
Scale Game of Life to huge matrices
This question evaluates a candidate's ability to design space-efficient, I/O-aware algorithms and streaming or external-memory techniques for processi...