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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Uber logo
Uber
Medium
Software Engineer Locked

Design an Iterative Path Tree and Clarify File Lookup Semantics

Design a component-based tree for unique absolute paths and traverse it with an explicit stack. The discussion covers repeated directory names, long p...

Software Engineering Fundamentals
3
0
35 people solved
Sep 4, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer Locked

Simulate Infection Spread on a Grid

This question evaluates the ability to implement and reason about discrete-time, grid-based simulations with multi-state cells and neighbor-dependent ...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
19
0
213 people solved
May 11, 2026
Amazon logo
Amazon
Medium
Applied ScientistSenior+ Locked

Mean and Variance Through Maximum Likelihood

Derive the normal-distribution maximum-likelihood estimators for mean and variance and understand why MLE variance differs from the unbiased sample va...

Statistics & Math
2
0
29 people solved
Aug 15, 2026
Databricks logo
Databricks
Hard
Software EngineerNew Grad

Find path in implicit Fibonacci tree

You are given a special family of binary trees called Fibonacci trees. The k‑th order Fibonacci tree T(k) is defined recursively: - T(1) is a single n...

Coding & AlgorithmsTrees
176
1
1333 people solved
Dec 10, 2025
Jain Global logo
Jain Global
Easy
Data Scientist

Python Internals: How dict Works, When Not to Use It, and NumPy Arrays vs Lists

After a resume discussion, a 30-minute first-round screen for a systematic trading team moved to quick Python fundamentals questions. Answer each part...

Software Engineering FundamentalsProgramming LanguagesMemory Management
1
0
10 people solved
Sep 4, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Reason About Alien Dictionary Ordering

Understand Alien Dictionary graph construction, prefix invalidity, cycle detection, and why source-permitted multiple orders need semantic validation.

Software Engineering Fundamentals
2
0
33 people solved
Aug 29, 2026
Elevenlabs logo
Elevenlabs
Medium
Software Engineer

Cheapest Shirt Color Sequence With No Color Repeated on Consecutive Days

A store runs a sale on blue, green and red shirts for the next n days. On day i, a blue shirt costs blue_costs[i], a green shirt costs green_costs[i],...

Coding & AlgorithmsDynamic Programming
1
0
8 people solved
Sep 1, 2026
Microsoft logo
Microsoft
Easy
Software Engineer

Implement interval room counter and token manager

You are given two coding questions. 1) Minimum number of rooms for time intervals You are given a list of meetings, where each meeting is an interval ...

Coding & AlgorithmsIntervals & SchedulingData Structure Design
208
3
2490 people solved
Feb 12, 2026
Airbnb logo
Airbnb
Easy
Software Engineer Locked

Implement a Removable Nested-List Iterator

Implement an iterator over mutable nested integer lists with repeatable lookahead and a legal once-per-item removal operation. Preserve traversal orde...

Coding & AlgorithmsData Structure Design
30
0
301 people solved
Jul 14, 2026
Anthropic logo
Anthropic
Medium
Software Engineer AI Locked

Maximum-Length Unique-Character Subset

This question evaluates a candidate's ability to combine bitmasking with backtracking or subset enumeration to maximize a constraint over combinations...

Coding & Algorithms
12
0
119 people solved
Jun 23, 2026
Capital One logo
Capital One
Medium
Software Engineer

Find the First Array Element Smaller Than Both of Its Neighbors

Given an array of integers, find the first element, scanning from left to right, whose two adjacent neighbors are both strictly larger than it. Functi...

Coding & AlgorithmsArrays & Strings
1
0
15 people solved
Aug 4, 2026
Onepay logo
Onepay
Medium
Software Engineer

Debug and Extend a Device Registry: Status Validation, Active Counts, Bulk Updates

You are handed a small existing Python module that manages a registry of devices, together with its tests. The exercise has several small steps that b...

Software Engineering FundamentalsDebuggingCode Quality & Maintainability
0
0
5 people solved
Sep 17, 2026
Baseten logo
Baseten
Hard
Software Engineer Locked

Parallelize Blocking API Calls with a Thread Pool

Replace sequential blocking API calls with a bounded thread pool while preserving each result's input association and return order. Define worker limi...

Software Engineering FundamentalsConcurrency
23
0
170 people solved
Jul 26, 2026
OpenAI logo
OpenAI
Medium
iOS EngineerSenior+ Locked

Design A ChatGPT-Style Assistant Product

Study a ChatGPT-style assistant product system design covering conversations, streaming responses, context assembly, model calls, safety checks, and m...

System DesignMobile Architecture & PerformanceLLM Applications
24
0
173 people solved
Jul 3, 2026
Capital One logo
Capital One
Medium
Data Scientist Locked

Evaluate Growth and Pricing for a Grocery Delivery Startup

Work through a grocery delivery data science mini-case covering marketplace growth, unit economics, profit calculation, and regional pricing strategy....

Analytics & ExperimentationBusiness Case AnalysisGrowth & Monetization
48
0
329 people solved
Jul 12, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Solve Subset Sum And Return All Matching Subsets

Practice subset-sum interview variants, from an O(target) dynamic programming existence check to returning all matching subsets. The prompt emphasizes...

Coding & Algorithms
17
0
117 people solved
Jul 6, 2026
Airbnb logo
Airbnb
Medium
Data Engineer

Calculate the Median House Price in Each City

Compute the median house price for each city using PostgreSQL. A city may have an odd or even number of price observations. Input Table house_prices |...

Data Manipulation (SQL/Python)SQL
2
0
20 people solved
Sep 4, 2026
Oracle logo
Oracle
Medium
Software Engineer

Handle On-Call Incidents

Handle On-Call Incidents Explain your on-call responsibilities and walk through how you handle an incident from alert to mitigation, communication, re...

Behavioral & Leadership
5
0
40 people solved
Aug 18, 2026
Sig logo
Sig
Easy
Data Scientist

Count Grid Paths with No Three Equal Moves

Count Grid Paths with No Three Equal Moves A frog moves from (0, 0) to (5, 5). Every step is either one unit right or one unit up. The frog refuses to...

Statistics & Math
4
0
31 people solved
Aug 16, 2026
Fluidstack logo
Fluidstack
Easy
Software Engineer Locked

Design a Fair GPU Training Job Platform

Design a fair platform for one-off GPU training jobs across a limited, heterogeneous fleet. Address job contracts, admission versus allocation, multi-...

System Design
14
0
113 people solved
Jul 21, 2026
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