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 balances, rejections, and platform reserve
This question evaluates transactional state management, time-ordered stream processing, balance reconciliation, handling of rejected transactions, and...
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...
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 shortest subarray with ≥k distinct integers
This question evaluates understanding of array algorithms, handling of distinct-element counting, and the ability to design time- and space-efficient ...
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...
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...
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...
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...
Implement solutions to several coding tasks
This multipart prompt evaluates algorithmic problem-solving and data-structure design skills across several areas: finding a minimum in a rotated sort...
Solve counting and frequency coding tasks
This question evaluates algorithmic skills in counting, frequency analysis, constraint-based pair counting, and stream-oriented tokenization and ranki...
Find shortest path in an OOP maze
This question evaluates graph traversal and shortest-path reasoning within an object-oriented codebase, focusing on state representation, neighbor exp...
Generate all subsets (handle duplicates)
This question evaluates understanding of power-set generation and handling of duplicate elements, measuring competency in combinatorics, enumeration t...
Compute shortest path in a 2D grid
Given an m x n grid where: - 0 represents an empty cell you can move through - 1 represents a blocked cell you cannot enter - movement is allowed in 4...
Compute Fibonacci Numbers
Write a function that returns the nth Fibonacci number. Definitions and requirements: - Use zero-based indexing: fib(0) = 0, fib(1) = 1. - For n >= 2,...
Write SQL for CTR and revenue
Write SQL for the following two tasks. Problem 1: CTR during peak vs. non-peak hours You are given three tables: - ads(ad_id BIGINT, advertiser_id BIG...
Check palindrome and find next larger palindrome
This question evaluates proficiency in string and numeric manipulation, specifically palindrome detection and generation of the next strictly larger n...
Compute shortest path in cyclic graph
This question evaluates understanding of graph algorithms and shortest-path computation in weighted directed graphs, including handling cycles, non-ne...
Count Enclosed Islands in a Grid
This question evaluates grid traversal and graph concepts such as connected-component detection, boundary-condition reasoning, and algorithmic time/sp...
Calculate Ultimate Loss by Policy Term
You work with insurance policy-term loss data. For a given policy term, its ultimate loss is defined as the sum of losses from the current term and al...