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 EngineerAnswer four string/array/battery coding questions
You are given four independent coding questions. Problem A — Uppercase vs lowercase count difference Given a string s (ASCII), count how many characte...
Coding & Algorithms
4
0
46 people solved
Dec 16, 2025
Hard
Software EngineerImplement binary encode/decode with frequency tree
Problem Implement a binary encoding and decoding scheme for strings based on character frequencies (Huffman-like coding). You must implement two funct...
Coding & Algorithms
8
0
132 people solved
Dec 15, 2025
Easy
Software EngineerImplement an LRU cache
Problem: LRU Cache Design and implement a data structure that supports an LRU (Least Recently Used) cache with a fixed capacity. Requirements Implemen...
Coding & Algorithms
5
0
74 people solved
Dec 15, 2025
Easy
Software EngineerFind a special person using knows(a,b)
Problem You are given n people labeled 0 to n-1 at a party. You can call an API: - knows(a, b) -> bool: returns true if person a knows person b, other...
Coding & Algorithms
13
0
102 people solved
Dec 15, 2025
Medium
Machine Learning EngineerNew GradWrite a generator for substring pattern matches
Problem Write a generator that scans a string and emits a value whenever a substring matches a given pattern. Input - A string s - A string pattern (n...
Coding & Algorithms
6
0
125 people solved
Dec 15, 2025
Medium
Machine Learning EngineerNew GradImplement TF-IDF scoring for documents
Problem Implement a simplified TF–IDF scorer. You are given: - A list of documents docs, where each document is a string. - A query string q. Tokeniza...
Coding & Algorithms
7
0
71 people solved
Dec 15, 2025
Easy
Software EngineerMerge overlapping time intervals
Problem You are given a list of closed intervals intervals, where each interval is [start, end] and start <= end. Merge all intervals that overlap and...
Coding & Algorithms
2
0
34 people solved
Dec 15, 2025
Easy
Machine Learning EngineerImplement 2D convolution forward pass
Problem Implement the forward pass of a 2D convolution (conv2d) from scratch (no deep learning libraries). You are given: - Input tensor x with shape ...
Coding & Algorithms
27
0
222 people solved
Dec 15, 2025
Hard
Software EngineerImplement an LFU cache
Problem: LFU Cache Design and implement a Least Frequently Used (LFU) cache with a fixed capacity. The cache supports the following operations: - get(...
Coding & Algorithms
10
0
85 people solved
Dec 15, 2025
Medium
Software EngineerCompute Jaccard similarity between two strings
Jaccard Similarity of Two Strings Given two strings a and b, compute their Jaccard similarity based on token sets. Tokenization rules - Convert to low...
Coding & Algorithms
10
0
150 people solved
Dec 15, 2025
Medium
Software EngineerValidate near-palindrome and course prerequisite feasibility
Coding round (40 minutes): two problems You do not need to run code, but you should: - Explain your approach clearly. - Walk through the logic on exam...
Coding & Algorithms
2
0
30 people solved
Dec 15, 2025
Medium
Software EngineerCompute party hours per town and city gaps
You are given (1) a region table describing a hierarchy of locations and (2) a list of party attendance time intervals (all timestamps occur within a ...
Coding & Algorithms
39
0
273 people solved
Dec 15, 2025
Medium
Machine Learning EngineerImplement weighted random city and sparse dot product
Question 1: Weighted random city picker You are given a mapping from city → population (all populations are positive integers). Implement a random gen...
Coding & Algorithms
11
0
80 people solved
Dec 15, 2025
Medium
Machine Learning EngineerCompute minimal time to finish dependent tasks
Coding: Task Scheduling With Prerequisites (Parallel Allowed) You have n tasks labeled 1..n. Each task takes exactly 1 unit of time to complete. Some ...
Coding & Algorithms
11
0
140 people solved
Dec 15, 2025
Medium
Machine Learning EngineerSolve shipping capacity and expression insertion
Problem A: Minimum shipping capacity You are given an array weights where weights[i] is the weight of the i-th package. Packages must be shipped in or...
Coding & Algorithms
10
0
92 people solved
Dec 15, 2025
Medium
Software EngineerConvert 32-bit integer to hexadecimal
Problem Given a 32-bit signed integer num, return its hexadecimal representation as a string. Requirements - Use lowercase letters a-f. - Do not inclu...
Coding & Algorithms
1
0
25 people solved
Dec 15, 2025
Medium
Software EngineerReturn all root-to-leaf path sums
Problem You are given the root of a binary tree where each node contains an integer value (may be negative). Return an array/list containing the sum o...
Coding & Algorithms
2
0
40 people solved
Dec 15, 2025
Easy
Software EngineerAnswer common behavioral questions using STAR
Behavioral questions Answer the following behavioral interview questions. Use specific examples from your past experience and structure your responses...
Behavioral & Leadership
4
0
43 people solved
Dec 15, 2025
Medium
Software EngineerAssemble DNA payload strings from tagged fragments
You are given a list of DNA-like fragments. Each fragment is a tuple: - start_tag: string - end_tag: string - payload: string A valid DNA chain is for...
Coding & Algorithms
14
0
224 people solved
Dec 15, 2025
Medium
Software EngineerFind two numbers that sum to a target
Array sum lookup Given an integer array nums and an integer target, find two distinct indices i and j such that: - nums[i] + nums[j] == target - i != ...
Coding & Algorithms
7
0
66 people solved
Dec 14, 2025