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."
Estimate Two Conditional Win Probabilities by Simulation
Estimate Two Conditional Win Probabilities by Simulation You are given a game with three closed doors, labeled 0, 1, and 2. Behind exactly one door is...
Count Interior Islands After Flooding
You are given an m x n binary grid representing land and water. - 1 = land - 0 = water An island is a maximal group of land cells connected 4-directio...
Parse a protobuf-like schema and answer queries
This question evaluates proficiency in parsing grammar-like schemas, scope-based name resolution for nested types, symbol-table construction, and desi...
Build User Journey Path Summary
Implement a function build_summary(logs) -> str that summarizes user journeys as a trie-like path tree. You are given a list of action logs. Each log ...
Solve jump maximization and palindromic path queries
This pair of problems evaluates algorithmic problem-solving skills: the first assesses array-based path optimization and stateful score maximization u...
Find Highest Product Segment
Given an integer array nums, find the maximum product obtainable from any non-empty contiguous segment. A contiguous segment must contain adjacent ele...
Count numbers with same popcount up to all-ones bound
This question evaluates skill in bit manipulation and combinatorial counting over binary representations in the Coding & Algorithms domain, specifical...
Solve theatre seating and ticker extraction
Implement the following two coding tasks. 1. Allocate groups in a movie theater You are given an integer n representing the number of rows in a movie ...
Find shortest subarray with at least k distinct
This question evaluates proficiency in array manipulation, frequency counting, and efficient tracking of distinct values within contiguous subarrays, ...
Count three-digit numbers with distinct digits
This question evaluates a candidate's understanding of digit manipulation, basic combinatorics, and implementation of value-range constraints in codin...
Solve three interview coding problems
This interview report described three coding tasks: 1. Generate a run-length spoken sequence Start with s1 = "1". To build the next term, read th...
Compute top-N items from log stream
This question evaluates the ability to aggregate frequencies and compute top-N results from logs, covering competencies in frequency counting, top-k a...
Find minimum total range-increment to sort
This question evaluates algorithmic problem-solving skills in array manipulation and optimization, focusing on reasoning about range-increment operati...
Design NL-to-SQL performance optimization assistant
This question evaluates a candidate's ability to design a secure, reliable, and cost-conscious natural-language-to-SQL performance diagnostic system t...
Validate a JSON-like string
This question evaluates parsing and string-processing skills, focusing on structural validation of JSON-like text including matching and nesting of br...
Design a logger that returns top-K messages
This question evaluates skills in designing in-memory data structures and algorithms for frequency counting and interval querying, including extractin...
Solve grid shortest-path and tree DP
This question pair evaluates proficiency in fundamental algorithmic techniques: finding shortest paths in a grid via breadth-first search and applying...
Compute balances, rejections, and platform reserve
This question evaluates transactional state management, time-ordered stream processing, balance reconciliation, handling of rejected transactions, and...
Implement an in-memory file system
This question evaluates a candidate's ability to design and implement in-memory file system data structures and APIs, covering hierarchical directory ...
Format text into fixed-width justified lines
This question evaluates string manipulation, greedy packing, and precise space-distribution skills, assessing competency in algorithmic implementation...