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
Software EngineerImplement dasher active-time calculator
Implement a function that, given a dasherId, a local pay-period interval [startLocalDateTime, endLocalDateTime), and a list of order events of the for...
Coding & Algorithms
35
0
341 people solved
Sep 6, 2025
Hard
Software EngineerDesign a resilient dasher payment system
Question Design an end-to-end payment system for DoorDash delivery drivers (Dashers) that computes payouts from order/delivery lifecycle events. The e...
System Design
93
0
805 people solved
Sep 6, 2025
Hard
Software EngineerDesign a production file storage service
System Design: Production-Grade File Storage Service Problem Design a production-grade file storage service with the following APIs, semantics, and co...
System Design
84
0
910 people solved
Sep 6, 2025
Hard
Machine Learning EngineerTrain a classifier and analyze dataset
End-to-End Binary Classifier Workflow (EDA → Modeling → Fairness → Report) You are given a labeled tabular dataset and asked to implement a reproducib...
Machine Learning
66
0
809 people solved
Sep 6, 2025
Medium
Software EngineerFind fair split of a two-color necklace
Given a circular necklace represented by a string s over {'a','b'}, you may cut the necklace at most twice (yielding three contiguous pieces). Can you...
Coding & Algorithms
14
0
176 people solved
Sep 6, 2025
Hard
Software EngineerDesign a flexible expense reimbursement system
System Design: Expense Reimbursement with Pluggable Rules and Group Constraints Context Design an enterprise expense reimbursement platform where admi...
System Design
40
0
377 people solved
Sep 6, 2025
Easy
Software EngineerDesign a Multimodal Training Data Pipeline
Design a backend system for collecting, filtering, and storing training data sent by many clients. Clients upload records that may include large media...
ML System Design
3
0
36 people solved
Apr 2, 2026
Easy
Software EngineerDesign a ChatGPT-like conversational assistant
Design a ChatGPT-like conversational assistant product. Assume you need to support: - Multi-turn chat with conversation history - Streaming responses ...
System Design
68
0
504 people solved
Feb 4, 2026
Medium
Software EngineerNew GradSolve tree and DP problems
This coding round contained two algorithm questions: 1. Deepest shared ancestor in a binary tree You are given the root of a binary tree and two ...
Coding & Algorithms
40
0
277 people solved
Oct 24, 2025
Hard
Software EngineerSenior+Design an Offline Multi-Device E-Book Reader
Design an Offline Multi-Device E-Book Reader Design an e-book reader service with APIs, database schema, and overall architecture. A user may read off...
System Design
1
0
22 people solved
Jan 1, 2026
Medium
Software EngineerDesign a Reliable Bank Payment System
Design a Reliable Bank Payment System Design a backend that accepts a customer's request to transfer money, tracks the payment through processing, and...
System Design
2
0
30 people solved
Apr 23, 2026
Medium
Software EngineerDefine a one-way function and its uses
What is a one-way function (also called a one-direction function) in cryptography? Define it precisely and explain common uses in real systems (e.g., ...
Software Engineering Fundamentals
9
0
122 people solved
Jan 17, 2026
Easy
Data ScientistMatch readings with latest same-city humidity
Problem You are given two time-sorted lists of sensor readings: - Temperature records: (time, city, reading) - Humidity records: (time, city, reading)...
Coding & Algorithms
15
1
173 people solved
Dec 15, 2025
Medium
Software EngineerGenerate all strings by expanding wildcards
Problem Given a string s consisting only of characters '0', '1', and '', replace every '' with either '0' or '1' and return all possible resulting bin...
Coding & Algorithms
19
1
158 people solved
Dec 15, 2025
Medium
Software Engineer LockedDesign a superhero incident dispatch system
This question evaluates system design and distributed systems competencies, including geospatial indexing, real-time location ingestion, low-latency m...
System Design
15
0
188 people solved
Feb 12, 2026
Medium
Machine Learning EngineerSenior+Model y from x and interpret distributions
Scenario You are given a dataset with one input feature x and a target y. The interviewer asks: “How would you model this?” Later, you are shown a plo...
Machine Learning
14
0
176 people solved
Feb 12, 2026
Medium
Software Engineer LockedImplement Task Management and Duplicate Detection
This question evaluates implementation and system-design skills across two problems: an in-memory task management service (CRUD operations, prioritize...
Coding & Algorithms
3
0
19 people solved
May 16, 2026
Medium
Frontend Engineer LockedBuild a React Parking Lot Manager
This question evaluates frontend engineering skills in React, including functional components and hooks, client-side state management, UI design, algo...
Software Engineering Fundamentals
23
0
188 people solved
May 4, 2026
Medium
Machine Learning EngineerInternExplain Python and Systems Fundamentals
Answer the following software engineering fundamentals questions: 1. A production system has become very slow. How would you detect the bottleneck, me...
Software Engineering Fundamentals
13
0
105 people solved
Mar 12, 2026
Hard
Machine Learning EngineerDesign an end-to-end training framework
Design an end-to-end training framework Design an End-to-End Time-Series Forecasting Framework (PyTorch) You are tasked with designing a production-gr...
ML System Design
35
0
345 people solved
Aug 1, 2025