Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.8k
Companies
511
Updated
08.16.2026
9.8k Questions 511 Companies08.16.2026
PLTCHK
"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"
_The_TaNk_
"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"
ChrisSenior SWE, LinkedIn
"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."
sleepy33
"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."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"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."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"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."
ShrutiData Engineer, Salesforce
"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."
midnightramen
"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."
BiancaFrontend Eng, Figma
"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."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"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."
Showing 20 results
Role
Medium
Machine Learning EngineerExplain Sampled-Softmax Correction and Classification Loss Choice
A recommendation model must choose one item from a very large catalog. Training approximates the full softmax by sampling negative items from a nonuni...
Machine Learning
0
0
10 people solved
Jul 24, 2026
Hard
Software EngineerBuild a Progressive Banking Ledger
Build a Progressive Banking Ledger The source reports the four feature stages but not exact ledger semantics. The APIs, event priorities, cashback tim...
Coding & Algorithms
3
0
49 people solved
Jul 8, 2026
Easy
Software EngineerValidate order book data across multiple databases
Assume your organization stores order book–related data in multiple databases (e.g., one for raw exchange messages, one for normalized orders, one for...
System Design
95
0
1170 people solved
Dec 15, 2025
Medium
Software EngineerImplement a Simple Memory Allocator
Design and implement a simplified memory allocator exposing malloc(size) and free(ptr) over a single fixed-size heap (a contiguous byte array). The al...
Software Engineering Fundamentals
36
0
375 people solved
May 29, 2026
Hard
Machine Learning EngineerNew GradExplain Core ML Interview Concepts
You are in a phone screen for an applied scientist / machine-learning engineer role and are asked to verbally explain a set of machine-learning fundam...
Machine Learning
236
0
1932 people solved
Apr 27, 2026
Medium
Backend EngineerImplement a Synchronized First-Available Seat Allocator
Implement a Synchronized First-Available Seat Allocator Implement the core of a concurrent ticket-booking service with N seats numbered 1 through N. S...
Software Engineering Fundamentals
2
0
16 people solved
Jul 15, 2026
Medium
Software EngineerCount Completed Jobs in a Serial Multi-Worker Pipeline
Count Completed Jobs in a Serial Multi-Worker Pipeline An automation pipeline contains stages that execute in order. Each stage is represented as [num...
Coding & Algorithms
6
0
56 people solved
Jul 13, 2026
Medium
Software EngineerDesign an Enterprise Remote Browser Isolation System
Design an Enterprise Remote Browser Isolation System Design a system that runs browsing sessions on isolated virtual nodes and streams the result to e...
System Design
0
0
9 people solved
Jul 26, 2026
Medium
Software EngineerSearch a Rotated Sorted Array in One Binary-Search Pass
Search a Rotated Sorted Array in One Binary-Search Pass Problem Implement searchRotated(values, target) -> index. values was formed by taking a strict...
Coding & Algorithms
0
0
9 people solved
Jul 26, 2026
Hard
Software EngineerSolve Timed Logical and Quantitative Reasoning Cases
Solve Timed Logical and Quantitative Reasoning Cases Work through the seven short assessment cases below. For each reasoning case, use only the stated...
Software Engineering Fundamentals
0
0
9 people solved
Jul 26, 2026
Medium
Software EngineerSenior+Design a CI/CD Task Scheduler
Design a CI/CD Task Scheduler Design the scheduling core of a continuous-integration and continuous-delivery system. A pipeline is a directed acyclic ...
System Design
9
0
65 people solved
Jun 11, 2026
Medium
Software EngineerDesign a Human Workflow Distribution System
Design a workflow system that distributes tasks to human workers and tracks progress until completion. The system should assign work, prevent duplicat...
System Design
7
0
106 people solved
Jul 2, 2026
Medium
Software EngineerExplain Hash Map Collisions and Operation Complexity
Explain Hash Map Collisions and Operation Complexity Explain how a hash map stores and retrieves key-value pairs. Then focus on collisions: what does ...
Software Engineering Fundamentals
0
0
6 people solved
Aug 2, 2026
Medium
Software EngineerAnswer Exact Island-Size Existence Queries
Implement island_size_queries(grid, queries) for a rectangular binary grid. Cells containing 1 are land, cells containing 0 are water, and land cells ...
Coding & Algorithms
0
0
4 people solved
Aug 8, 2026
Medium
Software EngineerSenior+Build a Custom CompletableFuture: Async Primitive and Parallel Array Processing
You are asked to design and implement, from scratch, a simplified asynchronous "future / promise" abstraction in the spirit of Java's CompletableFutur...
Software Engineering Fundamentals
22
0
157 people solved
Jun 29, 2026
Medium
Frontend EngineerBuild a Chainable Rectangle Manipulation API
Build a Chainable Rectangle Manipulation API You are given a page containing a 3-by-3 grid of rectangle elements and a JavaScript class whose methods ...
Software Engineering Fundamentals
1
0
14 people solved
Jul 18, 2026
Hard
Data ScientistSenior+Connect Probability, Experiment Sizing, and Bootstrap Inference
Connect Probability, Experiment Sizing, and Bootstrap Inference A product team wants a precise statistical readout for a billboard-style intervention....
Statistics & Math
6
0
40 people solved
Jun 2, 2026
Medium
Software EngineerModel and Solve a Rectangular Jigsaw Puzzle
Model and Solve a Rectangular Jigsaw Puzzle Design an object-oriented model for a rectangular jigsaw puzzle and outline an algorithm to solve it. Use ...
Software Engineering Fundamentals
12
0
94 people solved
Jul 2, 2026
Medium
Machine Learning EngineerRank Newly Launched Ads Under Cold Start
Rank Newly Launched Ads Under Cold Start Design a ranking model dedicated to ads launched within the last seven days, where direct performance history...
ML System Design
10
0
77 people solved
Jul 2, 2026
Medium
Software EngineerNew GradCount Grid Paths Without Three Consecutive Moves
Count Paths Without Three Consecutive Moves A frog starts at (0, 0) and must reach (right_steps, up_steps). Every move is exactly one unit right (R) o...
Coding & Algorithms
2
0
24 people solved
Jul 28, 2026