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 EngineerSenior+ LockedDesign first-time Kubernetes deployment in new cloud
This question evaluates system design and cloud platform engineering skills focused on first‑time Kubernetes deployment, covering account bootstrappin...
System Design
8
0
134 people solved
Jan 6, 2026
Medium
Data ScientistInternDaily Temperatures by Town: Linear Models to Predict NYC Temperature
Daily Temperatures by Town: Linear Models to Predict NYC Temperature You are given a dataset of historical daily temperature readings for New York Cit...
Machine Learning
8
0
77 people solved
Sep 10, 2025
Hard
Software EngineerIdentify and mitigate deduplication program risks
System Design: Robust File Deduplication in the Real World Context You are designing a file deduplication tool that scans large directory trees on one...
System Design
28
0
200 people solved
Aug 14, 2025
Medium
Software EngineerSenior+Place Pieces on a Grid
Given integers n and m, and an ordered list figures where each element is one of "A", "B", "C", "D", or "E", construct an n x m integer matrix grid. T...
Coding & Algorithms
6
0
66 people solved
Feb 8, 2026
Medium
Machine Learning Engineer AI LockedBuild Friend Recommendations
This question evaluates proficiency with graph data structures, set operations, uniform random sampling, counting mutual connections, and deterministi...
Coding & Algorithms
5
0
48 people solved
Feb 8, 2026
Medium
Software Engineer LockedImplement encryption and constant-time random set
This question evaluates understanding of symmetric shared-secret string transformation and the design of a randomized set supporting expected O(1) ope...
Coding & Algorithms
12
0
136 people solved
Feb 8, 2026
Easy
Data ScientistBuild a Next-Word Predictor
Implement a simple next-word model over tokenized training sentences. You need to write two functions: 1. train(sentences): receives a list of tokeniz...
Coding & Algorithms
9
1
84 people solved
Feb 8, 2026
Medium
Software Engineer LockedDesign and implement an LRU cache
This question evaluates knowledge of data structures, algorithmic design, API design, and memory/resource management required to implement an efficien...
Coding & Algorithms
8
0
115 people solved
Feb 8, 2026
Medium
Software Engineer LockedDesign an Instagram Stories feature
This question evaluates backend system design competencies including distributed systems, scalability, data modeling, API design, media storage/transc...
System Design
6
0
80 people solved
Feb 8, 2026
Medium
Software EngineerSenior+Settle Group Expenses with Transfers
You are given a list of group expense transactions from a trip. Each transaction contains: - payer: the person who paid the full amount. - amount: the...
Coding & Algorithms
3
0
21 people solved
Jan 5, 2026
Medium
Software EngineerDesign a text editor with undo/redo
Design and implement a text document editor that maintains a single string of content and supports undo/redo of edits. Model each edit using the Comma...
Coding & Algorithms
67
0
600 people solved
Aug 13, 2025
Hard
Software EngineerDesign and explain your project architecture
Question Pick one of your recent projects and walk an interviewer through its architecture end-to-end. Sketch a high-level diagram, then go deep on th...
System Design
7
0
116 people solved
Aug 13, 2025
Medium
Machine Learning EngineerExplain tokenization and Transformer variants
Tokenization and Transformer Architecture Deep Dive You are asked to explain common tokenization approaches and modern Transformer design choices used...
Machine Learning
9
0
122 people solved
Aug 13, 2025
Hard
Machine Learning EngineerNew GradImplement Optimal Bucket Batching
You are given an array lengths of K document lengths and an integer G representing the number of available GPUs. A batch is assigned to one GPU, and e...
Coding & Algorithms
2
0
35 people solved
Apr 27, 2026
Easy
Software Engineer LockedDesign a Real-Time Monitoring System
This question evaluates a candidate's system design and distributed-systems competencies, focusing on scalable time-series ingestion, storage, query, ...
System Design
4
0
58 people solved
Jan 4, 2026
Medium
Data ScientistDesign Siri-vs-GPT query routing
You are a Data Scientist at Apple designing a feature that decides whether a user's natural-language query should be routed to Siri or to a GPT-based ...
Machine Learning
12
0
152 people solved
Jan 4, 2026
Easy
Software Engineer LockedCompute minimum meeting rooms on circular day
This question evaluates a candidate's ability to reason about interval scheduling, circular time wrap-around, and resource allocation for overlapping ...
Coding & Algorithms
9
0
75 people solved
Jan 4, 2026
Hard
Data Scientist LockedDesign a Causal Upgrade Experiment
This question evaluates competency in causal inference and experimental design, focusing on handling selection bias, defining intent-to-treat and trea...
Analytics & Experimentation
17
0
124 people solved
Dec 3, 2025
Medium
Data ScientistMinimum Common Pairwise Correlation Among Seven Identically Distributed Random Variables
Suppose $X_1, X_2, \ldots, X_7$ are seven random variables defined on the same probability space. Each has mean $0$ and variance $1$, and they are ide...
Machine Learning
3
0
35 people solved
Jul 17, 2025
Medium
Software EngineerDesign a Scalable Job Scheduler
Design a job scheduler for a small startup, then explain how you would evolve it to support roughly 100x more scheduled tasks. The system should: - Al...
System Design
24
0
226 people solved
Mar 16, 2026