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."
Compute minutes since last train departure
This question evaluates time arithmetic and handling of cyclic day-wrap boundary conditions along with parsing and comparison of timestamp lists, refl...
Maximize sum without choosing adjacent elements
This question evaluates a candidate's understanding of array-based optimization and dynamic programming concepts for computing a maximum sum under non...
Validate parentheses and find k-th largest
This pair of problems evaluates mastery of fundamental data structures and algorithmic techniques: Problem A tests understanding of stack-based parsin...
Reconstruct route from unordered travel tickets
This question evaluates understanding of directed graph concepts and sequence reconstruction, assessing the ability to reason about ordered relationsh...
Infer user intent from typing in real time
This question evaluates machine learning system design competency in streaming, low-latency intent inference from typing and UI context, covering priv...
Add two integer strings using digit-adder
This question evaluates proficiency in string-based arithmetic, digit-wise addition, carry propagation, and management of arbitrarily large non-negati...
Build message schema parser with size/type queries
This question evaluates parsing of a simple message schema, construction of mappings from field names to primitive types and byte sizes, and computati...
Compute total time to finish all courses
This question evaluates competency in graph algorithms and scheduling, including dependency resolution, cycle detection, and aggregation of task durat...
Measure platform success and drive adoption
This question evaluates a candidate's competency in platform leadership, operational metrics, organizational scaling, and driving cross-team adoption ...
Minimize travel time with optional meeting point
This question evaluates a candidate's understanding of graph shortest-path computation and meeting-point optimization, testing skills in handling weig...
Minimize reduction cost and validate equal-sum pairs
This two-part question evaluates array manipulation and algorithmic problem-solving skills: the first task focuses on optimizing cumulative operation ...
Find where to cut cake into equal areas
This question evaluates geometric area computation, handling of piecewise-constant profiles formed by adjacent rectangles, and attention to numerical ...
Find viewing direction that sees most points
This question evaluates computational geometry skills, angular normalization and counting within a sector, and the ability to design algorithms that s...
Resolve user roles across account hierarchy
This question evaluates understanding of hierarchical data structures, role-based access control semantics, and set/map operations for computing effec...
Calculate transaction fees from CSV records
This question evaluates parsing and processing of structured transaction data, implementing multi-dimension fee computation rules (provider-, transact...
Compute balances, rejections, and platform reserve
This question evaluates transactional state management, time-ordered stream processing, balance reconciliation, handling of rejected transactions, and...
Find global GPU idle intervals
This question evaluates competency in interval reasoning, managing overlapping time ranges across distributed resources, designing online data structu...
Answer range queries for alternating parity subarrays
This question evaluates understanding of array manipulation, parity properties, efficient range-query processing, and preprocessing techniques for han...
Answer four array/time/grid query questions
This set of four problems evaluates array manipulation and comparison, time parsing and minute-difference calculation, linear path enumeration with ex...
Find longest increasing contiguous subarray
This question evaluates proficiency in array processing and algorithmic optimization, focusing on recognition of contiguous subarray properties and ha...