Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.8k
Companies
511
Updated
08.16.2026
9.8k Questions 511 Companies08.16.2026
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
Easy
Software EngineerDesign an alert notification system
Design a multi-tenant alert notification system for operational incidents. Monitoring sources send events when checks fire or recover. Users can confi...
System Design
22
0
313 people solved
Jan 28, 2026
Medium
Software Engineer LockedDesign a Hosted Notebook Platform
This question evaluates system design skills around stateful compute orchestration, including control-plane versus data-plane separation, workspace li...
System Design
294
0
3158 people solved
Apr 12, 2026
Medium
Machine Learning EngineerJoin Tables and Rank Users
You are given two analytics tables: - users(user_id, country, signup_date) - listening_events(event_id, user_id, played_at, minutes_played) Because th...
Coding & Algorithms
11
0
109 people solved
Mar 4, 2026
Medium
Software EngineerDesign an online ticket marketplace
Design a Ticketmaster-like system for discovering events and buying tickets. Your design should cover: - Functional requirements (e.g., browse/search ...
System Design
14
0
136 people solved
Mar 4, 2026
Medium
Software EngineerImplement a multi-level digital recipe manager
Implement a RecipeManager class for a digital recipe manager. The task is progressive (Levels 1–4). You can assume a single-process in-memory implemen...
Coding & Algorithms
29
0
306 people solved
Mar 4, 2026
Medium
Software EngineerAnswer tough self-awareness and team questions
In a director-level behavioral interview, answer the following questions clearly and professionally: 1. What is something people have misunderstood ab...
Behavioral & Leadership
19
0
165 people solved
Feb 8, 2026
Medium
Software Engineer LockedSolve Four Online Assessment Coding Tasks
This set of four problems evaluates a candidate's proficiency in core algorithmic competencies including string parsing and bracket validation, bitwis...
Coding & Algorithms
1
0
25 people solved
May 11, 2026
Hard
Software Engineer LockedSimulate Transaction Lock Scheduling
This question evaluates understanding of concurrency control, lock scheduling, transaction state management, and queuing behavior in the Coding & Algo...
Coding & Algorithms
0
0
11 people solved
May 27, 2026
Easy
Data Engineer LockedSolve SQL and PySpark Data Tasks
This question evaluates proficiency in SQL query design and PySpark DataFrame manipulation, covering aggregation, filtering, joins, time and numeric f...
Coding & Algorithms
1
0
18 people solved
May 27, 2026
Hard
Machine Learning EngineerImplement a Stateful Search Autocomplete Session
Implement a Stateful Search Autocomplete Session Build an autocomplete engine from historical sentences and their usage counts. While a user types a s...
Coding & Algorithms
2
0
34 people solved
Jul 3, 2026
Medium
Software EngineerInternMinimum Delivery Cost Between Cities
Minimum Delivery Cost Between Cities Implement minimum_delivery_costs(delivery_charges, queries). There are n cities indexed from 0 to n - 1, and city...
Coding & Algorithms
15
1
124 people solved
Jul 3, 2026
Medium
Software EngineerBuild Prefix Lookup with a Trie
Build prefix lookup for repeated queries. Given words and query prefixes, return matching words for each query in lexicographic order. Implement: `pyt...
Coding & Algorithms
3
1
13 people solved
Jul 3, 2026
Medium
Software EngineerFix race condition in concurrent deposit
Concurrent bank account debugging (thread safety) You are given a simple BankAccount object that is used concurrently from multiple threads. Two depos...
Software Engineering Fundamentals
20
1
210 people solved
Dec 15, 2025
Medium
Software EngineerDesign an object store with deduplication
System Design Prompt Design a simplified cloud object storage service (similar to an object store) that allows users to upload and download files. The...
System Design
49
0
396 people solved
Dec 15, 2025
Hard
Site Reliability EngineerHow to triage slow service alerts
A production alert indicates that a web service is experiencing high latency or slow responses. As an SRE, describe how you would triage, investigate,...
Software Engineering Fundamentals
17
0
135 people solved
Jan 27, 2026
Medium
Software EngineerHow to Identify Best Battery Group
You have historical quality data for batteries that were randomly assigned to one of 5 groups. Each battery then goes through 3 different quality test...
Machine Learning
24
0
186 people solved
Oct 26, 2025
Medium
Software EngineerSenior+ LockedDesign restaurant shift scheduling
This question evaluates skills in data modeling, backend system architecture, API design, scalability engineering, and consistency management for a mu...
System Design
8
0
111 people solved
Mar 3, 2026
Medium
Software EngineerDesign a user behavior monitoring system
System Design: User Behavior Monitoring System You are asked to design a monitoring/analytics system that collects user behavior events from clients (...
System Design
30
1
309 people solved
Dec 4, 2025
Medium
Software EngineerCount Digit-Reversal Equivalent Pairs
Define flipdigits(x) as the integer produced by reversing the decimal digits of non-negative integer x and removing leading zeroes from the reversed r...
Coding & Algorithms
0
0
10 people solved
Jul 2, 2026
Medium
Software EngineerCalculate Completion Time for a Single-Server Reactor Queue
A laboratory has one molecular reactor. Each accepted sample takes exactly 5 minutes to process. Samples arrive throughout the day at integer timestam...
Coding & Algorithms
1
0
14 people solved
Jul 2, 2026