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
Hard
Software EngineerDesign an LLM Inference Serving System
Design an LLM Inference Serving System Design a production system that serves inference requests for one or more large language models. Cover the requ...
ML System Design
1
0
23 people solved
Jul 26, 2026
Medium
Software EngineerDesign a Read- and Write-Heavy Product Catalog Service
Design a Read- and Write-Heavy Product Catalog Service Design a service in which merchants create and update product listings while users browse and v...
System Design
1
0
21 people solved
Jul 28, 2026
Medium
Software EngineerDesign a Concurrent, Memory-Bounded Tally Service
Design a Concurrent, Memory-Bounded Tally Service Design and implement the core of a TallyService with two operations: - bump(timestamp): record one e...
Software Engineering Fundamentals
8
0
87 people solved
Jul 1, 2026
Medium
Software EngineerImplement a Time-Aware Task Management System
Implement a Time-Aware Task Management System Implement a task-management class. All priority and quota values are nonnegative integers. Timestamps an...
Software Engineering Fundamentals
1
0
18 people solved
Jul 29, 2026
Hard
Software EngineerSenior+Use a Fitted Line to Predict a Future Data Point
Use a Fitted Line to Predict a Future Data Point You receive observed points (x_i, y_i) and need to predict y for a future input x_future. Assume a pr...
Machine Learning
8
0
87 people solved
Jul 21, 2026
Medium
Software EngineerDesign Radius-Based Notifications from Mobile Locations
Design Radius-Based Notifications from Mobile Locations Design a system in which mobile applications periodically send their users' locations to a ser...
System Design
0
0
5 people solved
Aug 16, 2026
Medium
Software EngineerMerge Two Unsorted Arrays into the First Array
Merge Two Unsorted Arrays into the First Array You are given two unsorted integer arrays, a and b. The final len(b) positions of a are placeholders, s...
Coding & Algorithms
0
0
5 people solved
Aug 16, 2026
Medium
Data ScientistSenior+Interpret Model Metrics, Regularization, and Resampling Fundamentals
Interpret Model Metrics, Regularization, and Resampling Fundamentals A screening discussion covers an imbalanced classifier with a 3 percent base rate...
Statistics & Math
2
0
33 people solved
Jul 20, 2026
Medium
Software EngineerSenior+Add Sliding-Window Get and Put Activity Metrics to a Key-Value Store
Add Sliding-Window Get and Put Activity Metrics to a Key-Value Store Extend an in-memory key-value store with averageGet(window) and averagePut(window...
Software Engineering Fundamentals
2
0
17 people solved
Jul 30, 2026
Medium
Software EngineerMinimize Fuel Cost Across Cities
Minimize Fuel Cost Across Cities Problem Hackerland has g_nodes cities numbered from 1 through g_nodes and bidirectional roads. Road i connects g_from...
Coding & Algorithms
0
0
14 people solved
Aug 3, 2026
Medium
Machine Learning Engineer LockedImplement 1NN with NumPy
This question evaluates implementing a 1-nearest-neighbor classifier with NumPy, testing skills in vectorized numerical computation, distance metrics,...
Machine Learning
291
3
2752 people solved
May 19, 2026
Medium
Software EngineerNew GradSolve a Set of Probability and Quantitative Reasoning Problems
Solve the following quantitative reasoning problems. Show enough work to make each result auditable, state any interpretation you need, and keep exact...
Statistics & Math
3
0
48 people solved
Jul 28, 2026
Hard
Machine Learning EngineerPredict Next-Week Streaming Engagement at Event Scale
Predict Next-Week Streaming Engagement at Event Scale Design an ML system that predicts whether a streaming user will be active next week. Discuss lab...
ML System Design
1
0
16 people solved
Jul 31, 2026
Medium
Software EngineerMerge Overlapping Closed Intervals
Implement merge_intervals(intervals) for closed intervals. Return disjoint closed intervals that cover exactly the same points, sorted by start. Inter...
Coding & Algorithms
1
0
9 people solved
Aug 9, 2026
Hard
Backend EngineerResolve Dependent Addition Equations
Resolve Dependent Addition Equations Problem Implement resolveEquations(equations) -> output. Each input string defines one variable as a sum of nonne...
Coding & Algorithms
0
0
13 people solved
Aug 4, 2026
Medium
Software EngineerDesign an Evaluation Platform for a Design-Editing Agent
Design an Evaluation Platform for a Design-Editing Agent A design application includes an agent that edits a user's document from natural-language ins...
ML System Design
3
0
31 people solved
Jul 21, 2026
Hard
Software EngineerSenior+Build a Constant-Time Snapshot Set Iterator
Build a Constant-Time Snapshot Set Iterator Design SnapshotSet, a set of integers whose iterators observe an immutable logical snapshot without copyin...
Coding & Algorithms
8
0
93 people solved
Jul 7, 2026
Medium
Software EngineerDesign a Centralized Logging System
Design a Centralized Logging System Design a system that collects application logs from a large fleet of microservice instances and makes them durable...
System Design
34
0
396 people solved
Jun 30, 2026
Medium
Software EngineerDesign a Distributed Rate-Limiting Service
Design a Distributed Rate-Limiting Service Design a rate-limiting service that protects APIs across many application instances. It should support per-...
System Design
5
0
108 people solved
Jul 2, 2026
Medium
Software EngineerSum Multiples of Three, Five, or Seven
Sum Multiples of Three, Five, or Seven Implement sum_multiples(limit). Return the sum of all distinct positive integers strictly less than limit that ...
Coding & Algorithms
6
0
42 people solved
Jul 27, 2026