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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
PLTCHK testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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."

PLTCHK testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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
Meta logo
Meta
Medium
Software Engineer

Implement BFS-based maze solver

Maze Printing and BFS Solver You are given a 2D grid representing a maze. Each cell of the grid is one of: - '#' – wall (cannot be passed) - '.' – emp...

Coding & AlgorithmsGrids & MatricesDebugging
39
0
380 people solved
Dec 7, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Find a Celebrity from a Knows Matrix

Problem Among n people, a celebrity knows nobody else and is known by everybody else. Determine the celebrity's index, or return -1 if no celebrity ex...

Coding & Algorithms
1
0
30 people solved
Feb 22, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design a URL shortening platform

Design a Scalable URL Shortening Platform Context Build a Bitly-like URL shortener that maps long URLs to short codes and performs HTTP redirection re...

System DesignSystem Design FundamentalsAPI Design
19
0
209 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Medium
Machine Learning Engineer

Implement cluster status tracker

Implement a cluster status tracker. Design a class with methods: update(nodeId, status, timestamp) to record node status updates that may arrive out o...

Coding & AlgorithmsData Structure Design
24
0
336 people solved
Jul 27, 2025
Waymo logo
Waymo
Medium
Software Engineer Locked

Find Shortest Knight Path

This question evaluates a candidate's ability to model grid-based movement as a graph and apply shortest-path traversal techniques, testing algorithmi...

Coding & Algorithms
9
0
68 people solved
Feb 20, 2026
Netflix logo
Netflix
Hard
Software Engineer

Design demand-side ads relational tables

You are designing the core relational data model for a demand-side advertising system. Create a normalized schema (tables + key columns + relationship...

Software Engineering FundamentalsSystem Design Fundamentals
45
0
368 people solved
Mar 9, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Design short-video retrieval with sparse text

You are designing the candidate-generation (retrieval) and recommendation system for a short-video app. Constraints and setting: - Users can search wi...

ML System Design
13
0
101 people solved
Feb 3, 2026
Google logo
Google
Medium
Software Engineer Locked

Simulate meeting-room bookings and return busiest room

This question evaluates a candidate's competence in scheduling and resource-allocation algorithms, focusing on simulation of interval-based bookings, ...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
18
1
190 people solved
Mar 1, 2026
Apple logo
Apple
Medium
Software Engineer

Optimize QA Benchmarks and Shared HPC Usage

A Software QA workflow runs benchmarks on shared high-performance computing (HPC) resources. How would you reduce resource usage and shorten turnaroun...

Software Engineering FundamentalsTesting & QualityJob Scheduling & Workflows
0
0
14 people solved
Mar 27, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Compute exclusive times and call stack from logs

Design an algorithm that, given a single-threaded program's execution log, computes per-function exclusive durations and reconstructs the active call ...

Coding & AlgorithmsStacks & Queues
23
0
273 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Machine Learning Engineer

Return all root-to-leaf tree paths

Given the root of a binary tree, return all root-to-leaf paths. - A leaf is a node with no children. - A path should be represented as a string with n...

Coding & AlgorithmsTreesBacktracking & Recursion
16
0
123 people solved
Dec 15, 2025
Medium
Software EngineerNew Grad Locked

Solve a Set of Probability and Quantitative Reasoning Problems

Work through fourteen quantitative interview problems covering probability, counting, expectation, algebra, logical constraints, and rate reasoning. E...

Statistics & Math
4
0
63 people solved
Jul 28, 2026
Ge logo
Ge
Medium
Software Engineer

Count visible people to the right

Problem You are given an array heights of length n, where heights[i] is the height of the i-th person standing in a line from left to right. For each ...

Coding & Algorithms
6
0
50 people solved
Feb 11, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Maximum Subarray Sum with a Length Cap

Compute the maximum sum of a nonempty contiguous subarray whose length cannot exceed a given cap. The prompt fixes negative-only behavior, integer-wid...

Coding & Algorithms
6
0
68 people solved
Sep 5, 2026
Bloomberg logo
Bloomberg
Medium
Software EngineerSenior+ Locked

Solve Grid Path and Unique Substring

This question evaluates algorithmic problem solving skills in grid traversal and stateful string processing, specifically testing understanding of pat...

Coding & AlgorithmsBacktracking & RecursionTwo Pointers & Sliding Window
29
0
212 people solved
Jan 29, 2026
Google logo
Google
Medium
Software Engineer

Count Spellings Using Chemical Element Symbols

Count Spellings Using Chemical Element Symbols Problem Given a list of valid chemical element symbols and a target word, count how many distinct ways ...

Coding & Algorithms
2
2
50 people solved
Apr 19, 2026
Zoox logo
Zoox
Medium
Data Scientist

Compute posterior for biased coin after 3H1T

You are given a coin known to be biased: one face lands with probability 2/3 and the other with probability 1/3, but you do not know whether Heads is ...

Statistics & MathBayesian Statistics
20
0
395 people solved
Oct 13, 2025
Upstart logo
Upstart
Easy
Data Scientist Locked

Identify binomial model and compute moments

This question evaluates understanding of probability distributions and independence by identifying the binomial model and computing its probability ma...

Statistics & MathProbability
13
0
147 people solved
Oct 13, 2025
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design a high-concurrency LLM inference service

This question evaluates a candidate's ability to design a high-concurrency LLM inference platform, assessing competencies in GPU utilization and memor...

ML System DesignLLM Inference & Serving
66
0
539 people solved
Feb 11, 2026
Citadel logo
Citadel
Easy
Software Engineer Locked

Implement LRU/LFU cache with custom eviction

This question evaluates proficiency in cache design and data-structure implementation, focusing on eviction policies (LRU, LFU), metadata tracking for...

Coding & AlgorithmsData Structure Design
30
0
289 people solved
Feb 11, 2026
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