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
Software EngineerImplement matrix transpose and KV store
The phone screen for a Linux-oriented software engineering role included multiple coding tasks: 1. Transpose an n x n matrix Given a square matri...
Coding & Algorithms
4
0
42 people solved
Feb 9, 2026
Medium
Software EngineerInternSolve mixed coding tasks from interviews
Solve the following interview-style coding problems (you may choose any programming language unless specified). Provide correct logic and handle edge ...
Coding & Algorithms
11
0
115 people solved
Feb 9, 2026
Hard
Machine Learning EngineerInsert parentheses to minimize expression value
You are given a string expression of the form A+B, where A and B are non-empty strings of digits (no digit is '0'). You must insert exactly one pair o...
Coding & Algorithms
6
1
115 people solved
Feb 9, 2026
Medium
Machine Learning Engineer LockedImplement K-means clustering from scratch
This question evaluates competency in clustering algorithms, numerical computation, and practical algorithm implementation, focusing on core K-means c...
Coding & Algorithms
3
0
50 people solved
Feb 9, 2026
Medium
Software Engineer LockedSolve small string and API tasks
This question evaluates proficiency in string algorithms (bracket validation and longest non-repeating substring) and practical API skills including H...
Coding & Algorithms
10
0
136 people solved
Feb 9, 2026
Easy
Data EngineerSenior+Differentiate pandas objects and SQL filters
Python (pandas) 1. What is the difference between a pandas Series and a pandas DataFrame? - Discuss structure (1D vs 2D), indexing, column labels, ...
Data Manipulation (SQL/Python)
2
1
41 people solved
Feb 8, 2026
Medium
Data ScientistEstimate Volatility from Gaussian and Brownian Samples
You are given two statistical estimation problems. 1. Let X_1, ..., X_100 be independent samples from N(0, sigma^2), where the mean is known to be 0 a...
Machine Learning
1
0
19 people solved
Feb 8, 2026
Medium
Software EngineerImplement ASCII canvas and solve two data problems
Solve the following coding tasks. 1) ASCII Canvas / Printer Implement a small drawing engine for a fixed-size canvas of width = 10 and height = 6. - E...
Coding & Algorithms
5
1
61 people solved
Feb 8, 2026
Medium
Machine Learning Engineer LockedCompute sum over consecutive-step subarrays
This question evaluates proficiency in array processing, detection of consecutive-step arithmetic sequences, and accumulation of subarray sums with at...
Coding & Algorithms
10
1
84 people solved
Feb 8, 2026
Medium
Site Reliability EngineerDetermine Complete Interval Coverage
You need to process a stream of real-valued points on a one-dimensional target segment from 0 to 50. Each time a point x arrives, it contaminates the ...
Coding & Algorithms
8
0
74 people solved
Feb 7, 2026
Medium
Software EngineerFill rooms with nearest-gate distance
You are given an m×n grid representing a building floor plan: - -1 = wall/blocked cell - 0 = gate - A large positive number (e.g., INF = 2^31-1) = emp...
Coding & Algorithms
6
0
58 people solved
Feb 7, 2026
Easy
Data Scientist LockedHow to experiment on ETA reduction
This question evaluates a data scientist's competence in causal inference, A/B test design, metric selection, and diagnosing observational confounding...
Analytics & Experimentation
16
0
203 people solved
Feb 6, 2026
Medium
Software EngineerImplement a Cache Snapshot Printer
Implement an LRU-style cache and a snapshot-printing feature. The cache stores key-value pairs and has a fixed capacity. It should support normal cach...
Coding & Algorithms
2
0
23 people solved
Feb 6, 2026
Hard
Software EngineerCalculate Daily Driver Pay
You are given a one-day event log for a delivery driver. Each input record is a JSON event with fields such as order_id, event_type, timestamp, and ba...
Coding & Algorithms
6
0
76 people solved
Feb 6, 2026
Easy
Software EngineerFind the nth prime number
Given an integer n (1-indexed), return the n-th prime number (e.g., n=1 -> 2, n=2 -> 3, n=3 -> 5). Design an algorithm that is efficient for moderatel...
Coding & Algorithms
5
0
104 people solved
Feb 6, 2026
Medium
Software EngineerCompute ways to climb n steps
Implement a function that returns the number of distinct ways to reach the top of a staircase with n steps if you can climb either 1 or 2 steps at a t...
Coding & Algorithms
4
0
29 people solved
Feb 6, 2026
Easy
Software EngineerImplement Batched Undo/Redo Layer
You are implementing a simplified document layer for a design tool. The layer stores properties as a map<string, string>. Implement a class that suppo...
Coding & Algorithms
7
0
57 people solved
Feb 4, 2026
Medium
Software EngineerFind the second most frequent tag
You are given a list of strings in the following repeating order: [id1, name1, tag1, id2, name2, tag2, ...] So every 3 consecutive elements describe o...
Coding & Algorithms
14
0
113 people solved
Feb 4, 2026
Medium
Software EngineerImplement a multithreaded task executor with semaphores
Design and implement a thread-safe TaskExecutor that limits concurrent work using a semaphore-like mechanism. You are given an interface similar to: -...
Coding & Algorithms
11
0
119 people solved
Feb 4, 2026
Easy
Data ScientistCompute multi-account user distribution and unread pct
You are working on a product where a user can have multiple accounts, and each account can receive notifications. Tables Assume the following schemas:...
Data Manipulation (SQL/Python)
4
0
36 people solved
Feb 3, 2026