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 a crash-resilient LRU cache
Implement an LRU-based memoization helper with behavior similar to a standard Python LRU cache. You are given an interface like this: `python class LR...
Coding & Algorithms
722
4
5132 people solved
Mar 13, 2026
Easy
Software EngineerExplain motivation for QA and career goals
Questions Answer the following as if speaking to a hiring manager: 1. Where do you want to develop your career in the next 2–5 years, and why? 2. Why ...
Behavioral & Leadership
16
0
112 people solved
Feb 12, 2026
Hard
Software Engineer LockedDesign a Core Dump Collection and Analysis System
Prepare for a Amazon system design interview about design a core dump collection and analysis system. This question focuses on requirements, architect...
System Design
3
0
44 people solved
Jun 4, 2026
Medium
Software Engineer LockedImplement a Distributed Rate Limiter
This question evaluates a candidate's ability to design and implement a distributed rate-limiting mechanism, testing knowledge of distributed systems,...
Coding & Algorithms
12
0
89 people solved
May 25, 2026
Easy
Software Engineer LockedSolve the N-Queens problem
This question evaluates a candidate's competence in backtracking, constraint satisfaction, combinatorial search, recursion, and state representation. ...
Coding & Algorithms
9
0
89 people solved
Feb 11, 2026
Medium
Software EngineerNew GradDetermine Whether P's Position Is Unique
You are given an R x C rectangular grid and a set of named entities. Each entity must be placed in exactly one distinct cell. You are also given a col...
Coding & Algorithms
5
0
78 people solved
Jan 22, 2026
Medium
Software EngineerCompare C++ new, malloc, and Placement new
Compare C++ new, malloc, and Placement new Explain what happens when a C++ new expression is evaluated, how it differs from malloc, what placement new...
Software Engineering Fundamentals
1
0
16 people solved
May 15, 2026
Hard
Software EngineerFind maximum value in huge text file
You are given the path to a very large text file on disk. The file has the following properties: - Each line contains exactly one signed 64-bit intege...
Coding & Algorithms
33
0
235 people solved
Dec 8, 2025
Medium
Machine Learning EngineerImplement greedy and beam decoding
Implement Greedy and Beam Search Decoders over Next-Token Probabilities Context You are given a directed token graph represented as a Python dictionar...
Machine Learning
69
0
576 people solved
Sep 6, 2025
Hard
Software EngineerDesign a job scheduler
Design a Scalable Distributed Job Scheduler Context Design a multi-tenant, horizontally scalable job scheduler for backend services. The system must p...
System Design
33
0
346 people solved
Sep 6, 2025
Medium
Data Scientist LockedMaximize Points by Buying Cost-Multiplier Cards
This question evaluates a candidate's ability to reason about optimal ordering and subset selection under a multiplicative-then-subtractive scoring ru...
Coding & Algorithms
1
0
13 people solved
Jun 25, 2026
Hard
Data ScientistIntern LockedWhy use the t-statistic?
This question evaluates understanding of the t-statistic as a standardized test measure connecting effect size, variance, and sample size, and probes ...
Statistics & Math
11
0
104 people solved
Apr 2, 2026
Medium
Software Engineer LockedAnswer Leadership Scenario Questions
This question evaluates leadership, judgment, stakeholder communication, product trade-off decision-making, and ownership skills within a software eng...
Behavioral & Leadership
2
0
41 people solved
Jun 3, 2026
Easy
Software EngineerExplain Out-of-Bounds Bugs and Infinite Loops
You are given a C or C++ code snippet that behaves incorrectly. The root cause is an out-of-bounds memory access, such as reading or writing past the ...
Software Engineering Fundamentals
15
0
110 people solved
Mar 25, 2026
Medium
Software EngineerSort Matrix Diagonals By Their Values
Given an n x n matrix of lowercase letters, consider every diagonal that runs from bottom-left to top-right. There are 2n - 1 such diagonals. Assign e...
Coding & Algorithms
3
1
24 people solved
Jul 7, 2026
Medium
Software EngineerDesign a Twitter-like service
Design a simplified Twitter-like system that supports: - Users can post short messages (tweets). - Users can follow/unfollow other users. - Home timel...
System Design
20
0
203 people solved
Jan 7, 2026
Medium
Data EngineerChoose Between Batch and Streaming for a Data Pipeline
Prompt The interview report mentioned detailed questions about the candidate's batch- and stream-processing experience, but it did not preserve an exa...
System Design
6
0
50 people solved
May 5, 2026
Easy
Data Scientist LockedDesign robber detection from surveillance video
This question evaluates applied machine learning and computer vision system-design skills, including precise task definition, data and labeling strate...
Machine Learning
69
0
747 people solved
Feb 22, 2026
Medium
Software EngineerHow do you debug slowness and bugs?
The interviewer asked two practical engineering questions: 1. A web application's frontend is loading very slowly. Describe how you would diagnose the...
Software Engineering Fundamentals
2
0
31 people solved
Apr 9, 2026
Medium
Software EngineerDesign sequence decoding with greedy and beam search
Design sequence decoding with greedy and beam search Next-Token Decoding: Greedy and Beam Search Context You are given a probabilistic next-token dict...
Machine Learning
91
0
770 people solved
Aug 8, 2025