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
Medium
Backend EngineerFind Bugs in an LRU Cache
Find Bugs in an LRU Cache The Java class below is intended to implement a least-recently-used cache. A successful get and every put should make the ke...
Software Engineering Fundamentals
9
0
79 people solved
Jul 4, 2026
Medium
Software EngineerSenior+Explain Your Most Meaningful Project Contribution
Explain Your Most Meaningful Project Contribution Tell the interviewer about a project you are most proud of. Explain why it mattered, what you person...
Behavioral & Leadership
0
0
3 people solved
Aug 6, 2026
Hard
Software EngineerSenior+Design a Write-Ahead Log Writer with Batch Writes
Design a Write-Ahead Log Writer with Batch Writes Design the low-level behavior of a write-ahead log writer that accepts records from concurrent calle...
Software Engineering Fundamentals
4
0
37 people solved
May 10, 2026
Easy
Software EngineerSenior+Design APIs for a Voting System
Design APIs for a Voting System Design the APIs and core data model for a voting system. Begin by clarifying the type of vote: identified or anonymous...
System Design
3
0
40 people solved
May 3, 2026
Medium
Data Scientist LockedExplain How L1 and L2 Regularization Change Linear-Model Coefficients
Review a machine learning interview question comparing ordinary least squares with L1 and L2 regularization. The prompt focuses on coefficient behavio...
Machine Learning
5
0
69 people solved
Jun 12, 2026
Medium
Software Engineer LockedExplain GPU Memory And Matrix Transpose Optimization
Study GPU software engineering fundamentals through concepts like warps, registers, shared memory, coalescing, cache behavior, tiling, and matrix tran...
Software Engineering Fundamentals
9
0
64 people solved
Jun 22, 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 EngineerFind Shared Motion Periods Across Camera Streams
Find Shared Motion Periods Across Camera Streams A camera emits readings (timestamp, intensity) sorted by strictly increasing timestamp. Intensity is ...
Coding & Algorithms
1
0
19 people solved
Jul 12, 2026
Medium
Software EngineerDefend a Redis Choice and Explain Database Index Trade-offs
Defend a Redis Choice and Explain Database Index Trade-offs During a project deep dive, an interviewer asks why your system used Redis and whether the...
Software Engineering Fundamentals
2
0
39 people solved
Jul 12, 2026
Medium
Software EngineerExplain and Harden Two Shell Commands
Explain and Harden Two Shell Commands Explain the behavior, operator semantics, and failure risks of these shell commands: `sh ps aux | grep foo | gre...
Software Engineering Fundamentals
4
0
47 people solved
Jul 12, 2026
Hard
Software EngineerProcess Delimited Product, Promotion, and Shelf Records
Process Delimited Product, Promotion, and Shelf Records You are given product records such as a100|apple|6|123, where the fields are SKU, name, quanti...
Software Engineering Fundamentals
1
0
15 people solved
Jun 30, 2026
Medium
Software EngineerSenior+Design a "Future Best-Sellers" Prediction and Recommendation System
Design a "Future Best-Sellers" Prediction and Recommendation System An e-commerce platform wants a new feature on its category pages. A user selects a...
ML System Design
8
0
76 people solved
Jun 30, 2026
Medium
Machine Learning Engineer LockedFilter Bad Human Annotations
This question evaluates expertise in data quality and annotation filtering for machine learning, including annotator reliability modeling, noisy-label...
Machine Learning
127
0
1406 people solved
Apr 3, 2026
Hard
Software EngineerExplain C++ Inline, Segfaults, Virtual Memory, and std::string Internals
Answer a C++ systems interview covering inline functions and inline variables, segmentation faults, MMU address translation, TLB and page tables, page...
Software Engineering Fundamentals
4
0
73 people solved
Jul 2, 2026
Medium
Software EngineerDesign a Bank Account OOP Simulation with Transfers, Payments, and Merges
Design an object-oriented banking simulation. Accounts can be created, balances can be queried, money can be transferred, payments can be recorded, an...
Software Engineering Fundamentals
6
0
95 people solved
Jul 2, 2026
Easy
Software EngineerDesign an IP Address Filtering Service
Design an IP Address Filtering Service Design a service that decides whether network requests should be allowed or denied based on source or destinati...
System Design
6
0
49 people solved
Apr 14, 2026
Medium
Machine Learning Engineer LockedExplain Top-k and Top-p Decoding
This question evaluates understanding of autoregressive decoding strategies in probabilistic language models, assessing competency in reasoning about ...
Machine Learning
8
0
81 people solved
May 23, 2026
Medium
Software Engineer LockedDesign a Direct Messaging System for an E-commerce Marketplace
This question evaluates a candidate's ability to design a real-time messaging system, covering distributed systems concepts like durability, ordering ...
System Design
9
0
99 people solved
Jun 11, 2026
Easy
Software EngineerDesign a Recipe and Inventory Ordering Service
Design a Recipe and Inventory Ordering Service Scenario Design an object-oriented service with recipes, supplies, and orders. A recipe has a unique na...
Software Engineering Fundamentals
5
0
54 people solved
Apr 4, 2026
Medium
Software EngineerBuild Nested Comments from Parent References
Build Nested Comments from Parent References You receive a flat collection of comment records. Each record has a unique comment ID, a parentId field, ...
Software Engineering Fundamentals
0
0
4 people solved
Aug 1, 2026