Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
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
Software Engineer LockedCount Candies from Unlockable Boxes
This question evaluates a candidate's understanding of graph traversal, state management, and object-oriented design to determine reachability and res...
Coding & Algorithms
1
1
32 people solved
May 27, 2026
Easy
Data Engineer LockedSolve SQL and PySpark Data Tasks
This question evaluates proficiency in SQL query design and PySpark DataFrame manipulation, covering aggregation, filtering, joins, time and numeric f...
Coding & Algorithms
1
0
18 people solved
May 27, 2026
Medium
Software Engineer LockedImplement a Composable Event Recommendation Engine
This question evaluates a candidate's skills in software design and implementation for recommendation systems, focusing on modular object-oriented arc...
Coding & Algorithms
6
0
83 people solved
Jan 21, 2026
Medium
Software EngineerSenior+ LockedDesign multi-tenant ingestion and processing platform
This question evaluates a candidate's ability to architect scalable, multi-tenant data ingestion and processing platforms, assessing competencies in t...
System Design
19
0
166 people solved
Jan 6, 2026
Medium
Software EngineerExplain container image flow in CI/CD
Scenario Walk through what happens in a typical CI/CD pipeline that builds and deploys a containerized service. Questions 1. During CI, how is a conta...
Software Engineering Fundamentals
31
0
198 people solved
Jan 6, 2026
Easy
Data ScientistCompute probability match lasts 5 games
Two players play independent games of table tennis. - Player A wins each game with probability \(p\) (constant across games). - They play a best-of-5 ...
Statistics & Math
20
0
230 people solved
Nov 11, 2025
Medium
Machine Learning Engineer LockedHow do you choose a model?
This question evaluates skills in model selection, task and business-objective definition, data-property analysis, production constraint reasoning, ba...
Machine Learning
11
0
102 people solved
Mar 10, 2026
Medium
Data ScientistSenior+Can bootstrap help reduce variance
An interviewer asks: “Can bootstrap help reduce variance?” Answer this question precisely. Distinguish between: 1) Using the bootstrap to estimate var...
Statistics & Math
16
0
192 people solved
Nov 24, 2025
Medium
Software Engineer LockedValidate Sorted Order Under a Custom Alphabet
This question evaluates a candidate's ability to apply custom ordering rules and string comparison logic, a common variant of array and string validat...
Coding & Algorithms
2
0
19 people solved
Jun 20, 2026
Medium
Software Engineer LockedIn-Memory File System: Create, Track Duplicates, and List
This question evaluates a software engineer's ability to design and implement an in-memory file system, testing data structure selection, path parsing...
Coding & Algorithms
3
0
13 people solved
Jun 20, 2026
Hard
Software EngineerMerge Overlapping Collinear Segments
You are given a list of 2D geometric segments: vector<vector<pair<double, double>>> segments Each inner list represents one segment and contains at le...
Coding & Algorithms
8
0
89 people solved
Apr 15, 2026
Medium
Software EngineerCompute top-N posts in a workspace
Design a feature that returns the top-N posts (e.g., Confluence pages/blog posts) in a workspace. Requirements: - Define what “top” means (e.g., views...
System Design
7
0
71 people solved
Jan 5, 2026
Medium
Software EngineerImplement BFS-based maze solver
Maze Printing and BFS Solver You are given a 2D grid representing a maze. Each cell of the grid is one of: - '#' – wall (cannot be passed) - '.' – emp...
Coding & Algorithms
34
0
331 people solved
Dec 7, 2025
Hard
Software EngineerDesign Points-from-Transactions Service
Design a Scalable Loyalty Points Service (USD → Points at 1 USD = 1.5 Points) You are designing a service that awards loyalty points for purchase tran...
System Design
68
0
494 people solved
Aug 14, 2025
Hard
Data ScientistDesign a leak-free time-split model
Predict 30-Day Purchase Probability at a Snapshot (Technical Screen) Assume you have user, event, and order data with two timestamps per row: - event_...
Machine Learning
4
0
61 people solved
Oct 13, 2025
Hard
Data ScientistDesign robust A/B test with interference and seasonality
Experiment Design: Redesigned Onboarding with Network Effects and Weekly Seasonality Background You are launching a redesigned onboarding flow for a c...
Analytics & Experimentation
11
0
103 people solved
Oct 13, 2025
Hard
Software EngineerHandle cache-update conflicts in distributed services
Design: Cache–Database Consistency with Concurrent Writers Context You operate a high-throughput service using a cache (e.g., Redis) in front of a rel...
System Design
27
0
404 people solved
Sep 6, 2025
Hard
Machine Learning EngineerImplement a trie-based tokenizer
Design and Implement a Trie-Based Subword Tokenizer for LLM Pretraining Context You are building a subword tokenizer for a large-scale LLM pretraining...
ML System Design
41
1
321 people solved
Sep 6, 2025
Medium
Software EngineerExplain AI coding assistant usage strategy
Responsible Use of AI Coding Assistants in a Live Coding Interview Context In a live technical screen where AI coding assistants are allowed, you are ...
Behavioral & Leadership
43
0
346 people solved
Sep 6, 2025
Hard
Data Scientist LockedAnalyze Profile Traffic Drop
This question evaluates a data scientist's competency in product-metrics analysis, instrumentation validation, segmentation and attribution, and causa...
Analytics & Experimentation
2
0
48 people solved
Jan 19, 2026