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."
Debug a Transformer bug in an unfamiliar repo
This question evaluates proficiency in debugging Transformer implementations, encompassing codebase navigation, tensor shape and broadcasting reasonin...
Design a token manager with lazy expiration
This question evaluates time-based data structure design and algorithmic reasoning for managing expiring items, focusing on hashing, timestamp orderin...
Write queries to compute salary and budget stats
You are given the following interview tasks. Write solutions in SQL and/or Python (pandas) as appropriate. Task 1 — Second highest salary You have a t...
Solve Two OA Algorithm Problems
The post describes two separate coding questions from an online assessment: 1. Greedy deletion by minimum value Given an integer array nums, repeate...
Design an Uber feature and analyze safety
You are interviewing for a Data Scientist summer internship at a ride-sharing marketplace. Part A: Product case Uber wants ideas for a new rider-facin...
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...
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...
Implement exponentiation and fill grid distances
This question evaluates algorithmic problem-solving skills in the Coding & Algorithms domain, specifically numeric algorithms for fast exponentiation ...
Find maximum-occurring character in a string
This question evaluates proficiency in string manipulation and frequency counting, including correct handling of tie-breaking by earliest first occurr...
Implement a Tic-Tac-Toe game API
This question evaluates implementation skills in data structures and algorithmic optimization, focusing on efficient state tracking and constant-time ...
Convert an IP range to minimal CIDRs
This question evaluates understanding of IPv4 address encoding, binary and bitwise operations, and optimal interval covering for expressing consecutiv...
Implement a Lazy Array
This question evaluates understanding of lazy evaluation and deferred computation, implementation of iterator/generator-like abstractions, and the abi...
Crawl Same-Domain Links
Implement a Python function that crawls a website starting from a seed URL and returns all unique pages reachable within the same domain. Assume a hel...
Implement an expiring counter class
This question evaluates a candidate's competency in implementing a sliding-window expiring counter, testing knowledge of streaming algorithms, data st...
Support updates and count target-sum pairs
This question evaluates data structures and algorithmic skills for dynamic pair counting, focusing on frequency management, efficient update handling,...
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...