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
Hard
Machine Learning EngineerDesign a search query autocomplete system
Question Design a search autocomplete system that suggests completions as the user types. Requirements - Sub-100ms latency per keystroke. - Suggestion...
System Design
23
0
259 people solved
Dec 15, 2025
Easy
Data ScientistSolve SQL and Python OA tasks
Complete the following two online-assessment tasks. Task A — SQL You are given two tables: customer - customer_id INT - customer_name VARCHAR - purcha...
Data Manipulation (SQL/Python)
4
0
60 people solved
Feb 16, 2026
Medium
Data Scientist LockedCalculate CTR and ad revenue
This question evaluates proficiency in data manipulation and analytics, specifically metric calculation (CTR) and multi-currency revenue aggregation, ...
Data Manipulation (SQL/Python)
7
1
79 people solved
Jan 25, 2026
Easy
Software Engineer LockedSolve meeting and tree problems
This question evaluates skills in interval manipulation and boolean-based merging, along with binary-tree traversal and side-view extraction for strin...
Coding & Algorithms
1
0
28 people solved
Apr 5, 2026
Easy
Software Engineer LockedFind Unique Target-Sum Pairs
This question evaluates array-processing skills, correctness in handling duplicate values, and the ability to identify unique value pairs whose sums m...
Coding & Algorithms
3
0
26 people solved
May 2, 2026
Medium
Software Engineer LockedDetermine Whether a Word Exists in a Graph
This question evaluates proficiency in graph algorithms and backtracking techniques, including traversal strategies, cycle avoidance, and state manage...
Coding & Algorithms
6
2
40 people solved
May 2, 2026
Easy
Software EngineerSenior+Design an online auction system
Design a scalable online auction service. Users can: - Create an auction (item info, start/end time, reserve price optional). - Place bids while the a...
System Design
13
0
179 people solved
Mar 11, 2026
Easy
Software EngineerDesign a shopping cart with coupons and tax
Design an object-oriented shopping cart module for an e-commerce system. Requirements: - A cart can add items and update item quantities. - The cart s...
Software Engineering Fundamentals
11
0
112 people solved
Mar 11, 2026
Medium
Data ScientistInternFive Pumpkins Weighed in Every Pair: Find the Total Weight
You have 5 pumpkins. You weigh them two at a time, in every possible pairing, and the scale readings for the ten pairs are: $$21,\ 22,\ 23,\ 24,\ 25,\...
Software Engineering Fundamentals
3
0
42 people solved
Aug 28, 2025
Medium
Data ScientistExplain Ensemble Learning and Its Main Families
Explain Ensemble Learning and Its Main Families Explain why combining multiple models can improve predictions. Compare bagging, random forests, boosti...
Machine Learning
0
0
9 people solved
Dec 14, 2025
Medium
Software EngineerSynchronize Shared Data Across Two Lists
Build a small mobile app with two list screens that fetch and display data. Some items may appear in both lists. Each item has at least: - id - title ...
Software Engineering Fundamentals
6
0
62 people solved
Jan 24, 2026
Medium
Software Engineer AI LockedFind Top Errors in Time Window
This question evaluates the ability to parse JSON logs, apply time-window filtering with inclusive/exclusive boundaries, aggregate error frequencies, ...
Coding & Algorithms
1
1
24 people solved
Jun 1, 2026
Medium
Software EngineerSenior+ LockedMinimize Travel Assignment Cost
This question evaluates algorithmic problem-solving in combinatorial optimization and dynamic programming, testing competency with cost-minimization, ...
Coding & Algorithms
1
0
15 people solved
Jun 1, 2026
Medium
Machine Learning EngineerImplement common neural network layers in PyTorch
Implement the following neural-network building blocks from scratch in PyTorch (using only basic tensor ops such as matmul, sum, mean, var, exp, max, ...
Coding & Algorithms
4
0
74 people solved
Mar 10, 2026
Medium
Data ScientistDiagnose Low CTR in an Advertising Campaign Funnel
Diagnose Low CTR in an Advertising Campaign Funnel An analysis has flagged several ad campaigns because their click-through rate (CTR) is below the av...
Analytics & Experimentation
2
0
21 people solved
Apr 4, 2026
Medium
Data ScientistCampaign Efficiency Metrics and Below-Average CTR
Campaign Efficiency Metrics and Below-Average CTR You are given an ad_campaigns table with one row per campaign: | Column | Type | Meaning | | --- | -...
Data Manipulation (SQL/Python)
1
0
22 people solved
Apr 4, 2026
Medium
Software EngineerDesign large video upload for a YouTube-like app
System Design Prompt Design the video upload subsystem for a YouTube-like product that supports large video files. Core user flow 1. User selects a la...
System Design
6
0
103 people solved
Dec 13, 2025
Hard
Machine Learning EngineerDesign an ads system to improve CTR
Design an ML system to increase the click-through rate (CTR) of ads shown in the personalized feed of an online social media platform. You run the ran...
ML System Design
17
0
153 people solved
Dec 13, 2025
Hard
Software Engineer LockedImplement an iOS scrollable grid with navigation
This question evaluates a candidate's proficiency with iOS UI layout and interaction, including grid layout and maintaining square cells, state manage...
Software Engineering Fundamentals
4
0
64 people solved
Jan 2, 2026
Easy
Data Scientist LockedMerge two sorted lists
This question evaluates a candidate's competency in array manipulation and merging algorithms, emphasizing understanding of ordered data and time comp...
Coding & Algorithms
4
0
72 people solved
Feb 13, 2026