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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
Google logo
Google
Medium
Software EngineerIntern Locked

Maximize sum without choosing adjacent elements

This question evaluates a candidate's understanding of array-based optimization and dynamic programming concepts for computing a maximum sum under non...

Coding & AlgorithmsDynamic Programming
13
0
120 people solved
Jan 6, 2026
Apple logo
Apple
Medium
Software Engineer

Describe common RTL lint warnings and errors

You are writing RTL (e.g., Verilog/SystemVerilog) and run a lint tool on your code. The tool reports items such as: - "Treat as black box" - Combinati...

Software Engineering FundamentalsDebuggingProgramming Languages
9
0
166 people solved
Dec 8, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Find and Fix the Root Cause of a Problem

Describe how you found and fixed a problem's root cause by tracing symptoms through competing hypotheses and evidence to the causal chain, recovery pr...

Behavioral & Leadership
1
0
22 people solved
Aug 16, 2026
Uber logo
Uber
Hard
Software Engineer

Check if each prefix forms 1..k permutation

You are given an integer array arr of length n that is a permutation of the numbers 1..n (each number appears exactly once), but in arbitrary order. F...

Coding & AlgorithmsArrays & Strings
27
0
276 people solved
Feb 11, 2026
Garner Health logo
Garner Health
Medium
Software EngineerSenior+ Locked

Design a Concurrent Appointment Booking System

Design a concurrent appointment service for searching provider availability, booking, cancellation, and rescheduling. Prevent double booking under rac...

System Design
4
0
33 people solved
May 24, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Deep-dive a project architecture

Question Pick one of your recent, non-trivial projects and conduct a deep, end-to-end technical review. This is an open-ended architecture deep-dive: ...

System DesignProject Deep DiveSystem Design Fundamentals
30
0
424 people solved
Jul 31, 2025
Pinterest logo
Pinterest
Hard
Data Scientist Locked

Design and Interpret a Video Pin Experiment

Design and interpret an experiment intended to increase video Pin creation while protecting content quality. Evaluate randomization, metric definition...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
11
0
95 people solved
May 17, 2026
Walmart Labs logo
Walmart Labs
Medium
Software Engineer

Design a multi-carrier parcel delivery system

Design a system for shipping customer parcels that supports multiple delivery partners/carriers (e.g., UPS, USPS, FedEx). Your system should enable an...

System DesignSystem Design FundamentalsAPI Design
31
0
241 people solved
Mar 1, 2026
Meta logo
Meta
Medium
Software Engineer

Find kth largest element in array

Question Given an unsorted array of integers nums and an integer k, return the k-th largest element in the array. The 1st largest element is the maxim...

Coding & Algorithms
7
0
107 people solved
Dec 8, 2025
Robinhood logo
Robinhood
Easy
Software Engineer

Design in-memory payment and friendship system

Design and implement an in-memory payment system with simple social features. The system processes a sequence of requests that can: 1. Register a user...

Coding & AlgorithmsLow-Level Design (OOP)
20
0
253 people solved
Dec 8, 2025
Netflix logo
Netflix
Medium
Data ScientistIntern

Estimate ATE of personalization on streaming

You are given a user-level dataset from an online experiment that randomized personalization (treatment) vs no personalization (control). Assume one r...

Analytics & ExperimentationExperiment Analysis & ReadoutHypothesis Testing
28
0
334 people solved
Mar 5, 2026
Netflix logo
Netflix
Medium
Software Engineer

Find longest unique show window

Given an array of show names (strings) representing a user's viewing history, return the start and end indices of a longest contiguous subarray that c...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
12
0
186 people solved
Aug 1, 2025
DoorDash logo
DoorDash
Hard
Software Engineer

Debug a cache incident end-to-end

Incident Scenario: Elevated Latency and Surge in Cache Misses You are paged for elevated tail latency and a spike in cache misses in a microservice th...

Software Engineering FundamentalsDebuggingCaching
31
0
294 people solved
Sep 6, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Design highly available blob storage service

Design a large-scale, highly available blob storage service similar to Amazon S3. The service should allow clients to store, retrieve, and delete arbi...

System DesignFile & Media StorageFault Tolerance & Failover
37
0
293 people solved
Sep 10, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Implement an IPv4 Range Iterator

This question evaluates implementing iterative data structures and range-handling algorithms alongside numeric representation of IPv4 addresses and bi...

Coding & AlgorithmsData Structure DesignIntervals & Scheduling
6
0
102 people solved
Jan 29, 2026
Reddit logo
Reddit
Easy
Data Scientist

Prioritize competing engineering requests

Scenario You are a Data Scientist/Analytics partner supporting multiple engineering teams. Two (or more) teams simultaneously ask you to prioritize th...

Behavioral & Leadership
5
0
94 people solved
Dec 11, 2025
Uber logo
Uber
Medium
Data Scientist

Design Pricing Model Experiment

You work as a data scientist for a ride-hailing marketplace. The company wants to launch a new pricing model that may change the price shown to riders...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
8
1
133 people solved
Mar 28, 2026
Meta logo
Meta
Easy
Data Scientist

Describe a challenging project and work-style conflicts

Question This is the Meta Data Scientist onsite behavioral & leadership round. The anchor prompt is to describe your most challenging recent project e...

Behavioral & LeadershipProject Deep DiveCommunication & Stakeholders
21
0
136 people solved
Dec 6, 2025
Roblox logo
Roblox
Easy
Machine Learning Engineer

Find the Most Frequent Log Call

You are given a sequence of application log entries. Each entry contains the name of a function or API call made by the system. Write a function that ...

Coding & AlgorithmsArrays & Strings
19
0
155 people solved
Feb 1, 2026
LinkedIn logo
LinkedIn
Easy
Data Scientist

Analyze member video posting behavior by country

Question You are given two tables describing LinkedIn members and the videos they upload. Write SQL (and optionally Python where noted) to answer the ...

Data Manipulation (SQL/Python)SQL
12
3
171 people solved
Feb 1, 2026
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