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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Nuro logo
Nuro
Medium
Software Engineer Locked

Generate Weighted Random Keys With Add And Remove

Review a weighted random key-generation coding prompt that introduces add, generate, and remove operations. The interview topic is useful for discussi...

Coding & Algorithms
8
0
82 people solved
Jul 2, 2026
Roblox logo
Roblox
Medium
Software Engineer Locked

Select Maximum Call Stacks Across Threads

Design queries that identify the most frequently sampled call stack overall and per thread under deterministic tie rules. Discuss precise stack identi...

Software Engineering FundamentalsData Structure DesignTrees
30
0
216 people solved
Jul 18, 2026
Meta logo
Meta
Medium
Software Engineer

Solve grid path and robot navigation

Part A — Shortest path in a grid with obstacles: Given an m×n grid of 0/1 cells (0 = open, 1 = obstacle), start at (0, 0) and end at (m−1,n− 1). You m...

Coding & Algorithms
15
0
105 people solved
Sep 6, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Implement map serialization and deserialization

You are given an in-memory map (dictionary) from strings to strings. Implement two functions: - string serialize(map<string, string> m) - map<string, ...

Coding & AlgorithmsParsing & Interpreters
89
0
698 people solved
Dec 1, 2025
Palantir logo
Palantir
Hard
Software Engineer

Design a scalable interview question bank

Design a scalable interview question bank System Design: Scalable Interview Question Bank Platform Context Design a multi-tenant SaaS platform for org...

System DesignSystem Design FundamentalsSearch & Feed Systems
99
0
779 people solved
Jul 26, 2025
Airbnb logo
Airbnb
Medium
Data Scientist Locked

Present Recent Analytics Work for a Recruiter

Learn how to present recent analytics work so a recruiter can accurately share it with a hiring team. Structure the answer around the decision, data g...

Behavioral & Leadership
2
0
44 people solved
Jul 8, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Debug round-robin, DashMap, and simple cache

You are given a service that routes requests to a list of nodes, each marked as either available or unavailable. The pickNode() function is intended t...

Coding & AlgorithmsDebuggingData Structure Design
113
0
869 people solved
Aug 7, 2025
Voleon logo
Voleon
Medium
Quantitative Researcher

Explain a Sorting Algorithm Such as Merge Sort: Mechanics, Correctness, Complexity

This is the first of three questions in a 60-minute technical screen for a quantitative role: explain a sorting algorithm of your choice. Merge sort i...

Software Engineering FundamentalsSorting
4
0
31 people solved
Oct 31, 2025
Optiver logo
Optiver
Medium
Software EngineerIntern

Implement a News Publishing System with Topic Subscriptions and Delivery Limits

You are building the core delivery engine for a news publishing service. The service continuously receives news items, stores them, and — whenever a p...

Coding & AlgorithmsData Structure DesignStacks & Queues
12
2
180 people solved
Nov 25, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Detect duplicate files efficiently

You are given access to a very large file system containing file paths and read access to file contents. Design an algorithm to identify groups of fil...

Coding & AlgorithmsFile & Media Storage
60
1
1067 people solved
Sep 6, 2025
Sig logo
Sig
Easy
Data Scientist

Compute Conditional Age Probability Among Cyclists

Compute Conditional Age Probability Among Cyclists One thousand survey participants reported a preferred exercise method. Results are grouped by age: ...

Statistics & Math
1
0
12 people solved
Aug 16, 2026
Citadel logo
Citadel
Medium
Software Engineer

Find earliest common meeting slot

Given K participants' calendars, each a list of busy intervals [start, end) within a working window [workStart, workEnd], and a meeting duration d min...

Coding & AlgorithmsIntervals & Scheduling
32
0
251 people solved
Sep 6, 2025
Stripe logo
Stripe
Medium
Software Engineer Locked

Process multi-currency payments with fees

This question evaluates a software engineer's competency in precise integer arithmetic and rounding semantics, multi-currency FX conversion with basis...

Coding & Algorithms
9
1
101 people solved
Nov 2, 2025
Airbnb logo
Airbnb
Hard
Software Engineer

Find best downhill ski run from a start

You are given an R x C grid of integers representing elevations. A skier starts at a given cell (sr, sc). From a cell, the skier may move up/down/left...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
29
2
406 people solved
Jan 19, 2026
Jain Global logo
Jain Global
Medium
Data Engineer Locked

Design and Debug a Point-in-Time Backtest Data Pipeline

Practice diagnosing a point-in-time financial backtest pipeline, from identifier resolution and vendor backfills to stale data, outliers, and look-ahe...

System Design
4
0
41 people solved
Jul 26, 2026
Waymo logo
Waymo
Medium
Frontend EngineerSenior+ Locked

Build a Debounced Autocomplete Search Bar

Build a debounced autocomplete search bar that remains correct under rapid typing, deletion, focus changes, selection, and out-of-order network respon...

Software Engineering Fundamentals
5
0
72 people solved
May 11, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Design an In-Memory Pub-Sub Model

Design an object-oriented, in-memory publish-subscribe model. Requirements: - A publisher can publish a message to a topic. - A subscriber can subscri...

Software Engineering FundamentalsLow-Level Design (OOP)Concurrency
17
0
303 people solved
Apr 10, 2026
Revolut logo
Revolut
Hard
Data Analyst

Find high-value crypto users and top CTR

You are given three tables. Assume all timestamps are stored in UTC. - users(user_id BIGINT PRIMARY KEY, create_date TIMESTAMP): one row per user acco...

Data Manipulation (SQL/Python)SQL
25
0
213 people solved
Feb 23, 2026
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Schedule Fixed-Order Tasks with a Cooldown

Find the minimum calendar days needed to execute tasks in their fixed input order when repeated task IDs require a specified number of complete cooldo...

Coding & Algorithms
10
0
87 people solved
May 12, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Find earliest supporting dependency version

Question Given a list of dependency versions (e.g. [103.003.02, 103.003.03, 203.003.02]) and a black-box API isSupported(v), design an algorithm to fi...

Coding & AlgorithmsBinary Search
86
0
651 people solved
Aug 4, 2025
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