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 EngineerDevelop test plan and TDD for word search
Design a Comprehensive Test Plan and TDD Workflow for Word-Search Functions Context and Assumptions We are testing two grid-based word search function...
Software Engineering Fundamentals
5
0
54 people solved
Sep 6, 2025
Hard
Software EngineerExplain SLI/SLO/SLA and design monitoring
SLI vs SLO vs SLA for a Web API; Error Budgets; Monitoring and Alerting Design Context: You are designing reliability goals and on-call policies for a...
Software Engineering Fundamentals
8
0
62 people solved
Sep 6, 2025
Hard
Software EngineerDesign viewing history and resume service
Design: Watched-Video and Resume Playback Service Context Design a backend service that records each user’s watched video list and lets them resume an...
System Design
13
0
94 people solved
Sep 6, 2025
Hard
Software EngineerDesign distributed transactions protocol
System Design: Distributed Transactions Across Multiple Services Context You must design a distributed transactions protocol to coordinate updates acr...
System Design
10
0
73 people solved
Sep 6, 2025
Medium
Software EngineerImplement and analyze number-pattern function
Implement a function print_number_lines(n) that prints n lines, where the i-th line contains the integers from 1 to i separated by spaces (e.g., n=3 p...
Coding & Algorithms
12
0
151 people solved
Sep 6, 2025
Hard
Software EngineerDesign an ML inference orchestration platform
System Design: ML Inference Orchestration Platform Context You are designing a multi-tenant platform that exposes several ML models as independent ser...
ML System Design
11
0
90 people solved
Sep 6, 2025
Medium
Software EngineerDescribe background and resume highlights
Behavioral Prompt: Resume Walkthrough, Project Deep Dives, Incident Ownership, Team Fit Context You are interviewing onsite for a Software Engineer ro...
Behavioral & Leadership
5
0
78 people solved
Sep 6, 2025
Hard
Software EngineerDesign a bank system with transfers
Single-Process BankSystem: APIs, Data Model, Algorithms, and Edge Cases Context and Assumptions You are asked to design and implement a single-process...
System Design
4
0
68 people solved
Sep 6, 2025
Medium
Software EngineerMaintain real-time top-K products from events
Design a data structure/class that ingests a stream of product events and returns the current top‑K products at any time. Events include {timestamp, p...
Coding & Algorithms
3
1
58 people solved
Sep 6, 2025
Medium
Software EngineerCross-reference logs to flag spam numbers
You are given two data sets: ( 1) a call log containing phone numbers observed in calls and ( 2) a list of user reports where each entry is a phone nu...
Coding & Algorithms
7
0
134 people solved
Sep 6, 2025
Medium
Software EngineerDesign rotating warehouse simulator with closures
Given an integer array cap[0..n-1] for warehouses 0..n-1 and a sequence of events, simulate package processing. Events: ( 1) "PACKAGE": process one pa...
Coding & Algorithms
20
0
151 people solved
Sep 6, 2025
Medium
Software EngineerImplement a Simple Banking Ledger
Design and implement a banking ledger for n accounts labeled 1..n with initial balances. Provide an API: deposit(id, amount) -> bool, withdraw(id, amo...
Coding & Algorithms
10
0
89 people solved
Sep 6, 2025
Hard
Software EngineerDesign an online ads serving system
System Design: Low-Latency Targeted Ad Serving (≤100 ms E2E) You are designing an online advertising serving system for web/app inventory with a stric...
System Design
35
0
290 people solved
Sep 6, 2025
Medium
Machine Learning EngineerImplement correct attention masking
Autoregressive Transformer: Correct Attention Masking with Padding Context: You are implementing decoder self-attention for an autoregressive Transfor...
Machine Learning
6
0
123 people solved
Sep 6, 2025
Medium
Machine Learning EngineerExplain motivation and role alignment
Behavioral: Motivation and Fit (HR Screen) Context: You are interviewing for a Machine Learning Engineer role during an HR screen. Answer the followin...
Behavioral & Leadership
8
0
77 people solved
Sep 6, 2025
Hard
Software EngineerScale the cache to a distributed system
Design: Scale a Single-Node LRU Cache to a Distributed Cache Assume you are upgrading a single-node, in-memory LRU cache to a distributed cache to sup...
System Design
8
0
95 people solved
Sep 6, 2025
Medium
Software EngineerSenior+Explain your memo, culture fit, and level justification
Behavioral Memo Walkthrough (Netflix HR Screen — Software Engineer) You are in the recruiter/HR screen for a Software Engineer role at Netflix that yo...
Behavioral & Leadership
22
0
185 people solved
Sep 6, 2025
Medium
Software EngineerVerify permutation in-place and implement fast power
1) Given an integer list A of length n, determine whether A is a permutation of [0, 1, ..., n-1]. Do it in-place with O( 1) extra space (no auxiliary ...
Coding & Algorithms
5
0
67 people solved
Sep 6, 2025
Hard
Software EngineerDesign a scalable food news feed
Question Design a news-feed feature for a food discovery app (DoorDash-style). The feed lists items showing title, author, short summary, and engageme...
System Design
12
0
106 people solved
Sep 6, 2025
Medium
Software EngineerImplement image carousel with comments and upvotes
Implement an image carousel that supports: 1) cycling forward/backward and autoplay with a configurable interval; 2) a per-image comment thread with c...
Coding & Algorithms
5
0
83 people solved
Sep 6, 2025