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 EngineerWalk Through Your Hardest Debugging Investigation
Question Walk me through the hardest production bug you have diagnosed. Explain the symptom, evidence you collected, hypotheses you formed and rejecte...
Behavioral & Leadership
0
0
2 people solved
Jun 3, 2026
Medium
Software EngineerSenior+ LockedFairly Distribute Money With Limits
This question tests practical algorithm design around greedy distribution with per-element constraints and iterative redistribution. It evaluates a ca...
Coding & Algorithms
0
0
10 people solved
Jun 3, 2026
Hard
Machine Learning Engineer LockedStreaming Entropy with Numerical Stability
This question tests a candidate's ability to implement numerically stable online algorithms for computing Shannon entropy over streaming data. It eval...
Coding & Algorithms
1
0
12 people solved
Jun 3, 2026
Medium
Software Engineer LockedReverse Nodes in K-Sized Groups
This question evaluates skills in manipulating singly linked lists, pointer reassignments, and performing in-place group transformations while meeting...
Coding & Algorithms
1
0
14 people solved
Jun 3, 2026
Hard
Data ScientistChoose Optimal Network Retry Threshold
You work on a mobile music streaming team responsible for improving playback reliability while minimizing battery drain. When the app is streaming aud...
Analytics & Experimentation
7
0
84 people solved
Mar 14, 2026
Medium
Data Scientist LockedExplain variance reduction in random forests
This question evaluates understanding of variance reduction in ensemble methods, the impact of inter-tree correlation on averaged predictors, and the ...
Machine Learning
13
0
88 people solved
Feb 19, 2026
Medium
Data Scientist LockedDerive mean and variance of x̄
This question evaluates understanding of expectation, variance, covariance structure, and how dependence between observations affects the precision of...
Statistics & Math
5
0
80 people solved
Feb 19, 2026
Medium
Software EngineerSenior+Traverse a Matrix in Spiral Order
Traverse a Matrix in Spiral Order Problem Given an m x n matrix, return all elements in clockwise spiral order. Begin at the top-left corner, move rig...
Coding & Algorithms
0
0
9 people solved
May 4, 2026
Medium
Data ScientistCompute the Product of an Array Except Self
The interview report preserved the input-output example but not every original restriction. The following is a self-contained version of the reported ...
Coding & Algorithms
9
2
62 people solved
May 4, 2026
Hard
Software EngineerNew Grad LockedSimulate In-Place Cellular State Updates
This question evaluates a candidate's ability to implement grid-based state transitions and manage in-place updates with strict space constraints, ass...
Coding & Algorithms
8
1
43 people solved
May 4, 2026
Hard
Software EngineerNew GradImplement and Defend a Generic C++ Stack
Implement and Defend a Generic C++ Stack Implement a dynamically growing generic stack in C++ and then defend its object-lifetime and call-semantics c...
Software Engineering Fundamentals
3
0
26 people solved
Oct 7, 2025
Medium
Software EngineerDebug missing output in Python async HTTP flow
You are given a Python program intended to call two HTTP APIs in order, process the returned JSON, and finally print the computed result. However, whe...
Software Engineering Fundamentals
11
0
91 people solved
Oct 24, 2025
Hard
Software EngineerDesign flight-price search service
Design flight-price search service System Design: Cheapest Flight Search Across Multiple Providers Context Design a backend system that searches multi...
System Design
19
0
185 people solved
Jul 17, 2025
Medium
Data ScientistNew Grad LockedImplement KNN from Scratch
This question evaluates a candidate's understanding and practical implementation skills for instance-based supervised learning, specifically the k-nea...
Coding & Algorithms
2
0
28 people solved
Apr 7, 2026
Medium
Data ScientistEvaluate Stripe Capital Lending Strategy
Stripe is considering expanding Stripe Capital, a lending product for existing merchants on the platform. Eligible merchants receive a pre-qualified w...
Analytics & Experimentation
9
0
91 people solved
Nov 29, 2025
Hard
Software EngineerDesign real-time driver heatmap system
System Design: Real-Time Driver Heatmap and Top-K Hottest Cells Context You are building a real-time driver heatmap for a ride-hailing platform that v...
System Design
88
0
956 people solved
Aug 1, 2025
Easy
Data ScientistDesign multimodal deployment under compute limits
You need to answer a set of questions related to multimodal model deployment and post-training optimization in an interview. Provide systematic explan...
Machine Learning
20
0
188 people solved
Feb 17, 2026
Easy
Machine Learning Engineer LockedDesign an ML job scheduler
This question evaluates competency in ML systems design, distributed resource scheduling, and cluster resource management for heterogeneous CPU and GP...
ML System Design
4
0
76 people solved
Jan 6, 2026
Easy
Machine Learning EngineerHow would you support ML stakeholders?
You are an ML infrastructure engineer working closely with a data scientist stakeholder. Discuss how you would handle the following situations in a pr...
Behavioral & Leadership
9
0
92 people solved
Jan 6, 2026
Medium
Software Engineer LockedDesign a distributed web crawler
This question evaluates the ability to design scalable, fault-tolerant distributed systems for web crawling, covering competencies such as URL dedupli...
System Design
84
0
588 people solved
Jan 6, 2026