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+ AIImplement a balance tracker and interval merger
This screening contained two coding exercises. Part 1: Driver balance tracker You are building an in-memory ledger for a delivery platform. Each updat...
Coding & Algorithms
10
0
95 people solved
Mar 10, 2026
Medium
Machine Learning EngineerConnect-N on an Infinite Board with Gravity
You are asked to implement a variant of the classic Connect Four game, played on an unbounded board. Game Rules - The board consists of vertical colum...
Coding & Algorithms
2
0
22 people solved
Dec 26, 2025
Medium
Data ScientistCompute Markov steady state and expectations
Compute Markov steady state and expectations Probability and Game Theory: Three Sub-questions Context: The exact transition matrix P (for Q1) and the ...
Statistics & Math
8
0
81 people solved
Jul 28, 2025
Medium
Software Engineer LockedAnswer Repeated Lookup Queries Efficiently
Implement batched lookups over a sorted integer array, returning the first index of each queried value while preserving query order. Account for dupli...
Coding & Algorithms
2
0
16 people solved
Jun 12, 2026
Medium
Software Engineer LockedDesign a Book Purchase Broker
Design a system for brokering book purchase requests across partner bookstores with target price constraints and expiration windows. The question eval...
System Design
0
0
10 people solved
Jun 12, 2026
Medium
Machine Learning Engineer LockedSimulate Grid Infection
This question evaluates skills in multi-source breadth-first search, synchronous simulation updates, boundary handling, and off-by-one correctness wit...
Coding & Algorithms
21
0
137 people solved
Mar 9, 2026
Hard
Software EngineerCompute subtree sums with tree DFS
You are given an undirected tree with n nodes labeled 1..n and n-1 edges. The tree is rooted at node 1. Each node i has an integer value val[i]. Retur...
Coding & Algorithms
24
0
245 people solved
Mar 9, 2026
Medium
Software EngineerProduce a Deterministic Course Plan
Produce a Deterministic Course Plan There are num_courses courses numbered 0 through num_courses - 1. Each prerequisite pair is [course, prerequisite]...
Coding & Algorithms
1
0
17 people solved
Apr 21, 2026
Medium
Software EngineerBuild and Validate a Binary Tree from Parent-Child Pairs
Build and Validate a Binary Tree from Parent-Child Pairs You are given a single input string that is supposed to describe a binary tree as a sequence ...
Coding & Algorithms
1
0
18 people solved
Apr 21, 2026
Easy
Data ScientistStone Pile Doubling Game: Can One Pile Be Emptied?
You are given two piles of stones containing a and b stones respectively (both piles start non-empty). You repeatedly apply the following move: - Let ...
Coding & Algorithms
1
0
12 people solved
Jul 26, 2025
Hard
Software EngineerDesign concurrency-safe shared payment account API
Design concurrency-safe shared payment account API Prevent Double-Spending When Two Users Pay Simultaneously from the Same Account Context You are des...
System Design
8
0
125 people solved
Jul 26, 2025
Medium
Data ScientistDesign an ad recommendation and ranking system
You are building an ad recommendation/ranking system for a content feed (e.g., short-form videos). At each feed position, you may show either an organ...
Machine Learning
10
0
88 people solved
Oct 20, 2025
Easy
Data ScientistFind recommended friend pairs by shared listening
Problem (SQL) You work on a music app and want to recommend new friend connections based on listening similarity. Tables Assume the following schemas:...
Data Manipulation (SQL/Python)
11
1
109 people solved
Nov 20, 2025
Medium
Software EngineerDesign scalable job scheduler and query dashboard
Design a scalable, fault-tolerant job scheduling system. The system should allow clients to schedule background jobs (for example, sending emails or r...
System Design
11
0
116 people solved
Nov 20, 2025
Medium
Machine Learning EngineerExplain ML basics and recommender tuning
Explain the following machine learning topics clearly and discuss their practical trade-offs: - overfitting and common ways to prevent it, - bagging a...
Machine Learning
2
0
48 people solved
Jan 28, 2026
Medium
Software EngineerExplain your biggest project with trade-offs
Behavioral interview (Amazon-style). 1) Pick the biggest/most impactful project you worked on. Explain the problem, your role, the technical design, a...
Behavioral & Leadership
7
0
87 people solved
Jan 28, 2026
Hard
Data ScientistDefine metrics for harmful-content severity
Context You are a Data Scientist on the integrity / harmful-content team for a large social media product. Leadership wants a way to track how bad pol...
Analytics & Experimentation
7
0
68 people solved
Sep 19, 2025
Medium
Product AnalystSenior+Explain How Your Analytics Work Shapes Product Strategy
Prompt You are speaking with a recruiter for a senior product-growth analytics role. Answer: “What do you do in your current role?” The recruiter is t...
Behavioral & Leadership
0
0
17 people solved
Apr 20, 2026
Medium
Software Engineer LockedRepeatedly Remove Adjacent Equal Characters
This question evaluates a candidate's ability to use a stack-based approach to repeatedly cancel out adjacent equal elements in a string. It tests und...
Coding & Algorithms
0
0
5 people solved
Jun 11, 2026
Medium
Software Engineer LockedAlternate Odd and Even Numbers with Two Threads
This question evaluates a candidate's understanding of multithreading and synchronization primitives such as locks and condition variables. It tests t...
Coding & Algorithms
0
0
6 people solved
Jun 11, 2026