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
Hard
Software EngineerDesign document-tag classes with concurrency safety
Design document-tag classes with concurrency safety System Design: In‑Memory Document–Tag Manager (Single Node) Context You are designing an in-memory...
System Design
5
0
46 people solved
Jul 31, 2025
Hard
Machine Learning EngineerDesign query generation to maximize CTR
Design query generation to maximize CTR Design an end-to-end query-generation system that maximizes click-through rate (CTR) for a large-scale search/...
ML System Design
6
0
64 people solved
Jul 31, 2025
Medium
Software EngineerCompute delivery metrics and top-K queries
Compute delivery metrics and top-K queries You have restaurant menus and orders for a food delivery platform. Part 1: Given a user location and a set ...
Data Manipulation (SQL/Python)
10
0
100 people solved
Jul 31, 2025
Hard
Machine Learning EngineerExplain motivation and mission alignment
In a behavioral interview for a mission-driven tech company, you are asked two related questions: 1. Why do you want to join this company? 2. How do...
Behavioral & Leadership
34
0
260 people solved
Oct 20, 2025
Medium
Technical Program ManagerSenior+Make decisions with limited data
In an Amazon L6 Senior Program Manager interview, you may be asked questions about customer feedback, fast decisions with limited data, and deep dives...
Product / Decision Making
11
0
120 people solved
Sep 7, 2024
Medium
Technical Program ManagerSenior+Answer Amazon leadership behaviorals
In an Amazon L6 Senior Program Manager interview, candidates may be asked several Leadership Principles-style behavioral questions. Prepare senior-lev...
Behavioral & Leadership
13
0
131 people solved
Sep 7, 2024
Medium
Software EngineerIntern LockedReturn a valid task order
This question evaluates understanding of graph algorithms and dependency resolution, testing the ability to produce a valid ordering of tasks and reco...
Coding & Algorithms
3
0
42 people solved
Jan 21, 2026
Medium
Data ScientistAssess ranking change and design experiment
A multi-account product currently orders a user's accounts by most recent visit. The product team wants to change the ranking so that accounts with th...
Analytics & Experimentation
3
0
49 people solved
Jan 21, 2026
Medium
Machine Learning Engineer LockedDesign an ads ranking system with calibration
This question evaluates a candidate's ability to design scalable, low-latency online machine learning systems for ads ranking, covering competencies i...
ML System Design
11
0
165 people solved
Jan 21, 2026
Hard
Data Scientist LockedExplain Bootstrap and Prove Uniformity
This question evaluates mastery of statistical inference and probability theory, testing knowledge of resampling methods (bootstrap), interpretation o...
Statistics & Math
15
0
151 people solved
Dec 3, 2025
Medium
Data Scientist LockedImplement sampling and subarray algorithms
Solve uniform 2D square sampling and longest increasing contiguous subarray. The solution maps Uniform(0,1) to Uniform(-1,1), proves uniformity by ind...
Coding & Algorithms
9
0
89 people solved
Mar 9, 2025
Hard
Machine Learning EngineerDiscuss Transformer LLM Design
Discuss Transformer LLM Design System-Design-Oriented LLM Question Context: You are designing, fine-tuning, and operating a Transformer-based large la...
ML System Design
39
0
155 people solved
Jul 29, 2025
Medium
Software EngineerNavigate maze via HTTP API
Question Implement a program that repeatedly calls a provided HTTP API which returns the next URL in a maze; continue following the URLs until reachin...
Coding & Algorithms
14
0
58 people solved
Jul 29, 2025
Medium
Software EngineerDetect shuffle-mode sequence
Question Given a playlist of distinct songs and two player modes—Random (each next song chosen independently and uniformly at random, with replacement...
Coding & Algorithms
104
0
174 people solved
Jul 29, 2025
Medium
Software EngineerProcess auth requests with fraud rules
Question Implement a function that, given a list of Authorization Requests (timestamp_seconds, unique_id, amount, card_number, merchant), outputs a hu...
Coding & Algorithms
63
0
117 people solved
Jul 29, 2025
Medium
Software EngineerRemove elements to avoid k-prefix duplicates
Question Given two lists listA and listB and an integer k, delete elements from listB so that the first k elements of the new listB share no value wit...
Coding & Algorithms
27
1
68 people solved
Jul 29, 2025
Medium
Data Scientist LockedHow to test account ranking change
This question evaluates a data scientist's competency in causal inference, experimentation design, metrics selection, and observational analysis using...
Analytics & Experimentation
5
1
70 people solved
Mar 16, 2026
Medium
Software Engineer LockedDesign a RAG Ranking Pipeline
This question evaluates expertise in retrieval-augmented generation, information retrieval and ranking, indexing and offline data pipelines, model int...
ML System Design
17
0
145 people solved
Mar 16, 2026
Medium
Software EngineerFind the Best Connected Strength for Every Tree Node
Find the Best Connected Strength for Every Tree Node A tree contains n neurons. Each neuron is either strong or weak. Assign weight +1 to a strong neu...
Coding & Algorithms
1
0
16 people solved
May 20, 2026
Medium
Software EngineerMaximize a Product After a Shared XOR
Maximize a Product After a Shared XOR Given positive integers a and b and a bit width n, choose an integer x with 0 <= x < 2**n that maximizes: `text ...
Coding & Algorithms
1
0
12 people solved
May 20, 2026