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 a simple API rate limiter
This question evaluates competency in designing scalable, low-latency API rate limiting, covering distributed-systems reasoning, storage and caching t...
Solve cache, grid path, and substring problems
This multipart question evaluates algorithmic problem-solving and data structure design skills, covering a capacity-bounded cache with eviction behavi...
Count subarrays with sum equals k
This question evaluates a candidate's competency in array algorithms and reasoning about contiguous subarray sums, including correct handling of negat...
Find minimum-latency path across dependent services
This question evaluates understanding of graph algorithms and shortest-path computation on weighted directed graphs, including handling cycles, multip...
Design a distributed rate limiter service
This question evaluates competency in distributed systems design, focusing on scalability, consistency, concurrency control, storage and sharding choi...
Detect stop tokens during streaming inference
This question evaluates streaming sequence-detection and pattern-matching skills, including online buffer management and correct handling of overlappi...
Implement a resumable data loader
This question evaluates a candidate's ability to design stateful, resumable data iteration with deterministic shuffling and compact serializable check...
Compute sums and maximum path in a tree
This question evaluates understanding and implementation of binary tree traversal, recursion, aggregation of node values, and computation of maximum s...
Compute iterative sliding-window sum reduction
This question evaluates algorithmic problem-solving and array-manipulation skills, focusing on sliding-window and iterative reduction concepts within ...
Design structure for insert and k-th largest
This question evaluates data-structure design and algorithmic efficiency for dynamic order-statistics over a multiset (duplicates allowed), focusing o...
Explain learning paradigms, loss, and embeddings
ML fundamentals (oral) Answer the following conceptual questions clearly and with examples: 1. What is supervised learning? What are typical inputs/la...
Solve array duplicates and two-type subarray
These problems evaluate proficiency with array manipulation, frequency and membership reasoning, and algorithmic analysis of time and space complexity...
Find minimum threshold enabling grid path
This question evaluates a candidate's understanding of grid pathfinding, reachability under constraints, and algorithmic optimization, focusing on ski...
Answer mixed behavioral and technical deep-dive questions
In a “behavioral” round that is mostly technical discussion, respond to prompts like: - What new skill did you learn recently? Why and how did you lea...
How would you articulate Uniswap’s impact?
You are interviewing for a software engineering role at a decentralized exchange (DEX) company like Uniswap. Answer the following open-ended questions...
Evaluate and safely deploy a CVR model online
You have built a new CVR (conversion rate) prediction model for an RTB bidding system at a DSP. Offline metrics improved (e.g., lower log loss and hig...
Find duplicate files and apply image operations
Part A — Find duplicate files by content You are given a list of directory records. Each record is a string describing a directory path followed by on...
Answer Cross-Functional Workplace Prompts
Prepare answers for the following behavioral and communication prompts for a software engineering interview: 1. Why are you interested in working for ...
Design an Attendance Payroll Service
Design the backend service for an employee attendance system. The service should support: - Employees clocking in and clocking out. - Computing each e...
Spell Out a Nonnegative Integer
Given a nonnegative integer, return its English words representation. Implement a function that handles numbers from 0 through 2,147,483,647 inclusive...