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
Medium
Software EngineerImplement a rate-limited hit counter
You are designing a hit counter that records the number of hits received in the past 5 minutes. Implement a class HitCounter with the following method...
Coding & Algorithms
20
0
328 people solved
Dec 8, 2025
Medium
Software EngineerFind common active intervals across cameras
You are now processing data from multiple security cameras. You are given: - An integer N, the number of cameras. - A threshold value T (a real number...
Coding & Algorithms
7
1
79 people solved
Dec 8, 2025
Medium
Software EngineerCompute median of two sorted arrays
You are given two sorted arrays of integers nums1 and nums2. - nums1 has length m, nums2 has length n. - Both arrays are sorted in non-decreasing orde...
Coding & Algorithms
11
0
214 people solved
Dec 8, 2025
Medium
Machine Learning EngineerFind shortest path in a grid with obstacles
You are given a 2D grid of size m x n representing a maze. Each cell in the grid is either empty (0) or blocked (1). You are also given two coordinate...
Coding & Algorithms
5
0
66 people solved
Dec 8, 2025
Medium
Software EngineerDescribe an ambiguous project you handled
Describe a time when you worked on a project with a lot of ambiguity (unclear requirements, unknown constraints, or shifting priorities). Explain: - W...
Behavioral & Leadership
2
0
48 people solved
Dec 8, 2025
Medium
Software EngineerMerge overlapping intervals
You are given a list of closed intervals on the number line, where each interval is represented as a pair of integers [start, end] with start <= end. ...
Coding & Algorithms
4
0
48 people solved
Dec 8, 2025
Medium
Software EngineerFind first CIDR block covering IP
You are given: - A single IPv4 address as a string, e.g. "192.168.1.5". - A list of CIDR blocks (IPv4), each as a string in the form "a.b.c.d/x", wher...
Coding & Algorithms
12
0
88 people solved
Dec 8, 2025
Medium
Software EngineerPaginate forward and backward through results
You are asked to extend a basic pagination system to support forward and backward navigation, similar to a cursor-based API. You are given: - A zero-i...
Coding & Algorithms
20
0
174 people solved
Dec 8, 2025
Medium
Software EngineerFind LCA in a N-ary tree via DFS
You are given the root of a rooted N-ary tree (each node can have zero or more children) and two distinct nodes p and q that belong to the tree. Desig...
Coding & Algorithms
15
0
124 people solved
Dec 8, 2025
Medium
Software EngineerCompute clock hand angle with seconds and milliseconds
You are given a time in the format "HH:MM", representing a 24-hour clock time with hours and minutes. Extend this to potentially include seconds and m...
Coding & Algorithms
10
0
161 people solved
Dec 8, 2025
Medium
Software EngineerInternCompare JavaScript == and === operators
In JavaScript, what is the difference between the == and === operators? Explain: 1. How each operator compares two values. 2. What type coercion is an...
Software Engineering Fundamentals
2
0
32 people solved
Dec 8, 2025
Medium
Software EngineerInternExplain the MVC architectural pattern
Explain the Model–View–Controller (MVC) architectural pattern. Include in your answer: 1. What each component is responsible for: - Model - View...
Software Engineering Fundamentals
6
0
46 people solved
Dec 8, 2025
Hard
Machine Learning EngineerDesign data structure similar to LRU cache
You are asked to design and implement a data structure that behaves similarly to an LRU (Least Recently Used) cache, but with a small variation: - The...
Coding & Algorithms
5
1
58 people solved
Dec 8, 2025
Medium
Software EngineerNew GradTrack Island Counts as Land Is Added
Track Island Counts as Land Is Added Problem Implement trackIslandCounts(grid, additions) -> counts. grid is a rectangular array containing 0 for wate...
Coding & Algorithms
0
0
9 people solved
Dec 8, 2025
Medium
Software EngineerNew GradReturn Unique Three-Sum Value Triples
Return Unique Three-Sum Value Triples Problem Implement threeSumTarget(nums, target) -> triples. Return every distinct value triple [a, b, c] for whic...
Coding & Algorithms
1
0
15 people solved
Dec 8, 2025
Medium
Software EngineerNew GradReturn the Lexicographically Smallest Two-Sum Index Pair
Return the Lexicographically Smallest Two-Sum Index Pair Problem Implement twoSumSmallestPair(nums, target) -> pair. Return the lexicographically smal...
Coding & Algorithms
2
0
14 people solved
Dec 8, 2025
Medium
Data ScientistSenior+ LockedImplement bootstrap mean and variance
This question evaluates a candidate's ability to implement bootstrap resampling and compute statistical estimates for the sampling distribution of the...
Coding & Algorithms
4
0
66 people solved
Dec 8, 2025
Easy
Data ScientistDesign and evaluate a new group call feature
Product / DS Case: Group Calls for Messenger Groups Messenger has Groups but does not currently support group calls. You are evaluating whether to bui...
Analytics & Experimentation
11
0
94 people solved
Dec 8, 2025
Easy
Data ScientistCompute percent of active users with 50+ calls
Problem You work on a Messenger-like app. You want to measure how many active users in Great Britain (GB) today have been heavy callers recently. Tabl...
Data Manipulation (SQL/Python)
8
1
110 people solved
Dec 8, 2025
Medium
Software EngineerDesign system to detect privacy-leak records
You are given a very large database that contains user data (both structured fields and unstructured text such as logs, messages, and documents). The ...
ML System Design
4
0
50 people solved
Dec 8, 2025