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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
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Design Duplicate File Detection

This question evaluates system design and storage engineering skills, including scalable file-processing, efficient I/O and resource management, corre...

System DesignFile & Media StorageSystem Design Fundamentals
53
0
394 people solved
Apr 3, 2026
Pinterest logo
Pinterest
Medium
Data Scientist Locked

Implement weighted random choice

This question evaluates understanding of weighted random sampling, probability distributions, input validation, and algorithmic time and space complex...

Coding & AlgorithmsProbabilityArrays & Strings
20
0
132 people solved
Mar 10, 2026
Illumio logo
Illumio
Hard
Software EngineerSenior+ Locked

Design a Time-Series Database

Design a time-series database for sustained measurement ingest and range queries across labeled series. Explore partitioning, immutable storage, label...

System Design
1
0
27 people solved
Jul 9, 2026
Aurora logo
Aurora
Medium
Software Engineer

Evaluate an Arithmetic Expression

Evaluate an Arithmetic Expression Implement a function that evaluates a valid arithmetic expression containing non-negative integers, the binary opera...

Coding & Algorithms
3
0
49 people solved
Apr 15, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Infer an Alien Alphabet from Sorted Words

Infer a valid alien alphabet from words already sorted in that language. Build precedence constraints from adjacent words, reject invalid prefix order...

Coding & Algorithms
2
0
33 people solved
Aug 15, 2026
Google logo
Google
Medium
Data ScientistSenior+

When do you use mixed-effects models

You are modeling a user outcome (e.g., watch time or retention) across many countries and many users. Observations are nested (multiple days per user;...

Machine LearningRegression & Statistical Modeling
23
0
241 people solved
Nov 24, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Design menu DP and optimize for three items

You are given a restaurant menu with n single items and m combo offers. Each single item i has a price p[i] (in cents). Each combo j specifies nonnega...

Coding & AlgorithmsDynamic Programming
21
3
157 people solved
Sep 6, 2025
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer

Find first non-repeating character index

You are given two separate coding tasks. Task 1: First Unique Character Given a string s (lowercase/ASCII letters), return the index of the first char...

Coding & AlgorithmsArrays & Strings
8
0
133 people solved
Dec 15, 2025
Qualcomm logo
Qualcomm
Medium
Software EngineerNew Grad

How Would You Optimize a Program

You are given an existing program that produces correct results but is too slow in production. Describe a structured plan to optimize it. Your answer ...

System DesignDebuggingMemory Management
16
0
120 people solved
Apr 7, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Text-to-Video Generation Service

This question evaluates understanding of ML system design, distributed scheduling, durable asynchronous job pipelines, GPU resource orchestration, and...

ML System DesignGPU InfrastructureJob Scheduling & Workflows
16
0
176 people solved
May 22, 2026
Roblox logo
Roblox
Medium
Software Engineer

Detect shuffle-mode sequence

Question Given a playlist of distinct songs and two player modes—Random (each next song chosen independently and uniformly at random, with replacement...

Coding & Algorithms
120
0
289 people solved
Jul 29, 2025
C3 AI logo
C3 AI
Medium
Software EngineerNew Grad

Maximum-Sum Star with at Most K Arms

Given a simple undirected graph with an integer value on each node and an integer k, return the largest node-value sum of any nonempty star subgraph w...

Coding & AlgorithmsGraphsGreedy
1
0
22 people solved
Jan 23, 2026
Fluidstack logo
Fluidstack
Easy
Software Engineer Locked

Discuss a Complex Project, Motivation, Strengths, and Sustainable Work

Prepare supportable examples covering a complex cross-functional project, motivation, team questions, strengths, weaknesses, outside interests, and su...

Behavioral & Leadership
8
1
77 people solved
Jul 21, 2026
Harvey logo
Harvey
Medium
Software Engineer

Handle multi-source string matching and tagging

Question Given an LLM output string and a list of source strings, design an algorithm to count how many times each source appears in the output. Exten...

Coding & Algorithms
27
0
181 people solved
Jul 29, 2025
Google logo
Google
Hard
Software Engineer

Find safe travel intervals between planet influences

You are planning a space route along a one-dimensional line (the x-axis). You are given a list of planets. Each planet is represented by an integer pa...

Coding & AlgorithmsIntervals & SchedulingSorting
18
4
141 people solved
Nov 22, 2025
Google logo
Google
Medium
Software EngineerNew Grad

Track Island Counts as Land Is Added

Track Island Counts as Land Is Added Problem Implement trackIslandCounts(grid, additions) -> counts. grid is a rectangular array containing 0 for wate...

Coding & Algorithms
5
0
47 people solved
Dec 8, 2025
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
Axon logo
Axon
Medium
Software Engineer

How did you handle an ethical issue?

Describe a time when you encountered an ethical issue at work. What was the situation, why was it ethically sensitive, what options did you consider, ...

Behavioral & LeadershipEthics & Responsibility
25
0
190 people solved
Mar 16, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Compare Shop and Web Ad Performance Without Overclaiming

Learn how to compare Shop and Web ad performance using spend and conversion data without turning an observational result into a causal claim. The anal...

Analytics & Experimentation
5
0
52 people solved
May 22, 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
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