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
Easy
Data ScientistExplain forward contracts and options
In a finance-focused technical interview, you are asked to explain two basic derivative instruments: 1. What is a forward contract? 2. What is an opti...
Software Engineering Fundamentals
5
0
42 people solved
Oct 21, 2025
Medium
Software Engineer LockedCount Regions in a Binary Grid
This question evaluates understanding of grid-as-graph representations, identification of connected components, and competency in algorithmic problem-...
Coding & Algorithms
1
0
19 people solved
Oct 20, 2025
Easy
Data ScientistInternFind kth missing integer and redundant operations
You are given two independent coding tasks. Task 1: K-th missing number You are given an integer array nums (not necessarily sorted) containing distin...
Coding & Algorithms
8
0
56 people solved
Oct 20, 2025
Hard
Software EngineerImplement transaction network queries
Problem You are building a small in-memory library to track pairwise customer transactions and answer connectivity questions about who has transacted ...
Coding & Algorithms
5
0
60 people solved
Oct 19, 2025
Easy
Software EngineerFind first and last index of target
You are given an integer array nums sorted in non-decreasing order and an integer target. Return a pair [left, right] where: - left is the index of th...
Coding & Algorithms
7
0
64 people solved
Oct 19, 2025
Easy
Data ScientistImplement monotonic-array linear interpolation
Question Implement a function interpolate(array_x, array_y, x) that returns the linearly interpolated y-value for a query x-value, given paired data p...
Coding & Algorithms
2
0
58 people solved
Oct 18, 2025
Medium
Software EngineerPrint directory tree with indentation
You are given a root directory of a filesystem represented as a tree. Each node is either a directory (can have children) or a file (no children). Pri...
Coding & Algorithms
15
0
114 people solved
Oct 18, 2025
Medium
Software EngineerTrack article votes and last three flips
Problem Design an in-memory data structure for voting on articles. Users can vote on an article with either: - Thumbs up - Thumbs down - No vote (user...
Coding & Algorithms
28
0
229 people solved
Oct 17, 2025
Easy
Software EngineerCompute max coins with 3-step token moves
You are given a one-dimensional board with n positions represented by a string s of length n: - . = empty cell - T = token - C = coin You may move tok...
Coding & Algorithms
22
0
152 people solved
Oct 16, 2025
Medium
Data Scientist[Analytical Reasoning] Comparing Two Newsfeed Ad Insertion Methods
Compare two ad-insertion methods for a 100-post newsfeed. Both methods have the same average ad load. - Method A: each post is independently replaced ...
Analytics & Experimentation
18
0
78 people solved
Apr 7, 2025
Medium
Machine Learning Engineer LockedCompute moving and weighted averages from a stream
This question evaluates a candidate's understanding of streaming algorithms, sliding-window statistics, and resource-constrained data structure design...
Coding & Algorithms
3
0
37 people solved
Oct 15, 2025
Medium
Machine Learning Engineer LockedAssign bookings to minimum tennis courts
This question evaluates interval scheduling and resource-allocation competencies, testing algorithmic and data-structure knowledge for handling time-i...
Coding & Algorithms
3
0
35 people solved
Oct 15, 2025
Medium
Software EngineerValidate a bracket string
Given a string s containing only the characters '(', ')', '{', '}', '[', and ']', determine whether the input string is valid. A string is valid if: 1...
Coding & Algorithms
5
0
39 people solved
Oct 14, 2025
Medium
Data ScientistCompute posterior fake probability using Bayes' rule
A platform runs an automated detector to flag fake accounts. - Prior probability an account is fake: \(P(F)=0.02\). - True positive rate (sensitivity)...
Statistics & Math
10
0
74 people solved
Oct 14, 2025
Easy
Data ScientistAnswer ambiguity and PM disagreement behavioral questions
Behavioral questions 1) Describe a time you worked on a problem with high ambiguity (unclear goals, incomplete data, shifting requirements). What did ...
Behavioral & Leadership
5
0
54 people solved
Oct 14, 2025
Easy
Data Scientist LockedDiagnose metric anomalies and evaluate new algorithm
This question evaluates competency in analytics-driven incident investigation, experiment design, metric instrumentation, and product-metric interpret...
Analytics & Experimentation
5
0
51 people solved
Oct 14, 2025
Medium
Software EngineerBuild a time-based key-value store
Problem Design a data structure that stores multiple values for the same key at different timestamps, and can retrieve the most recent value as of a g...
Coding & Algorithms
7
0
70 people solved
Oct 14, 2025
Medium
Data ScientistSolve queue switch and coin change puzzles
This entry contains two separate interview-style quantitative/algorithmic questions. --- 1. Queue switching decision problem You are standing in a sin...
Coding & Algorithms
17
0
150 people solved
Oct 14, 2025
Medium
Data ScientistWrite SQL to analyze shop visibility
You are given two tables. Use standard SQL (window functions allowed). Assume "today" is 2025-09-01 and that “currently visible” means a shop’s last s...
Data Manipulation (SQL/Python)
1
0
3 people solved
Oct 13, 2025
Medium
Data Scientist LockedCompute and interpret quantile loss vs RMSE
This question evaluates competency in probabilistic forecasting evaluation, including understanding of quantile (pinball) loss versus point-error metr...
Statistics & Math
10
0
77 people solved
Oct 13, 2025