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
Backend EngineerDesign a Therapy Matching Marketplace
Design the backend for a marketplace that matches patients with therapists. The platform should support: - Patients searching for therapists by specia...
System Design
3
0
55 people solved
Jan 13, 2026
Medium
Machine Learning Engineer LockedExplain leakage, missing data, and common losses
This question evaluates a candidate's understanding of data leakage, strategies for handling missing data, and the differences between loss functions ...
Machine Learning
11
0
116 people solved
Jan 13, 2026
Medium
Machine Learning Engineer LockedImplement K-means clustering from scratch
This question evaluates a candidate's understanding of clustering algorithms and practical implementation skills in unsupervised machine learning, inc...
Coding & Algorithms
8
0
122 people solved
Jan 13, 2026
Medium
Data EngineerCompare Data Infrastructure Storage Choices
You are designing data infrastructure for an autonomous-driving company. Discuss the following storage and processing concepts and trade-offs: 1. In P...
Software Engineering Fundamentals
2
0
26 people solved
Apr 11, 2026
Easy
Software EngineerCount Trips From Vehicle Logs
You are given a text log of vehicle events on a road system. Each log record contains: - license_plate: a string identifying a vehicle - event_type: o...
Coding & Algorithms
4
0
22 people solved
Apr 11, 2026
Medium
Software EngineerNew GradImplement Due Broadcast Sender
You are building a notification system. You are given: - A mapping from company_id to a list of subscriber IDs. - A list of broadcast logs. Each log c...
Coding & Algorithms
2
0
31 people solved
Apr 11, 2026
Medium
Data ScientistDescribe Learning, Conflict, and Mistakes
You are interviewing for a Data Scientist role. Answer the following behavioral questions using specific examples from work, research, or internships:...
Behavioral & Leadership
3
0
69 people solved
Apr 11, 2026
Medium
Data Scientist LockedExplain Feature, Model, and Validation Choices
This question evaluates a candidate's competency in end-to-end machine learning project execution, including data processing workflows, feature creati...
Machine Learning
5
0
68 people solved
Apr 11, 2026
Hard
Software Engineer LockedImplement a Leaky Bucket Limiter
This question evaluates understanding of rate-limiting algorithms (leaky bucket), concurrent programming, time-based state management, and thread-safe...
Coding & Algorithms
4
0
37 people solved
Feb 23, 2026
Easy
Data EngineerSolve Two String Problems
You are asked to solve the following two coding problems: 1. Unique Morse Code Transformations You are given an array of lowercase English words, word...
Coding & Algorithms
20
0
153 people solved
Feb 23, 2026
Medium
Software EngineerImplement a uniq-like function
Implement a function similar to the Unix uniq utility. You are given a sequence of strings representing lines of text in the order they appear in a fi...
Coding & Algorithms
39
1
265 people solved
Feb 23, 2026
Hard
Machine Learning EngineerValidate Nested Configuration Objects
You are given a set of custom descriptor objects that define the expected schema of a configuration object. Implement a validator that checks whether ...
Coding & Algorithms
2
0
44 people solved
Jan 12, 2026
Easy
Data ScientistSenior+Describe a challenging project
You are interviewing for an L5 Data Scientist role. Answer the following behavioral questions in a way that demonstrates Deliver Results: 1. Tell me a...
Behavioral & Leadership
7
0
69 people solved
Jan 12, 2026
Medium
Machine Learning EngineerSenior+Design a collaborative spreadsheet backend
Design a web-based spreadsheet service similar to Google Sheets, with emphasis on backend architecture and data models. Focus areas: - Multiple users ...
System Design
7
0
71 people solved
Jan 12, 2026
Medium
Software EngineerSenior+Answer Staff-level leadership scenarios using STAR
Behavioral prompts (Staff/L6) Provide structured answers (e.g., STAR) for scenarios like: 1. Most important technical decision you drove: how you deci...
Behavioral & Leadership
7
0
79 people solved
Jan 12, 2026
Easy
Software Engineer LockedAdd One to Digit Array
This question evaluates proficiency in array manipulation and elementary arithmetic on digit sequences, specifically carrying operations and edge-case...
Coding & Algorithms
1
2
22 people solved
Jun 5, 2026
Hard
Software Engineer LockedImplement Datacenter Router Commands
This question evaluates proficiency in stateful command processing, input validation, geospatial computation (Haversine distance), deterministic sorti...
Coding & Algorithms
2
0
17 people solved
Jun 5, 2026
Medium
Machine Learning EngineerBuild a baseline classification model from messy data
In a live notebook (e.g., Jupyter), you are given a messy, real-world tabular dataset for a binary classification problem. Data characteristics - Targ...
Machine Learning
13
0
133 people solved
Dec 4, 2025
Easy
Software EngineerImplement Chat Event Counter
Design an in-memory counter for chat activity. You need to implement a class with the following two methods: `text processEvent(userId: string, chatId...
Coding & Algorithms
2
0
26 people solved
Apr 10, 2026
Medium
Data ScientistSenior+Design a Maps Address Search Bar
Design the search experience for a map application's address bar, similar to the search box in Google Maps. The system should handle multiple user int...
Analytics & Experimentation
5
0
58 people solved
Apr 10, 2026