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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
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Explain how browser authentication works with JWTs

This question evaluates understanding of browser-based authentication with JWTs, covering token storage trade-offs, how tokens are sent with requests,...

Software Engineering Fundamentals
9
0
70 people solved
Feb 11, 2026
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design recommendation and weapon-ad detection systems

This question evaluates proficiency in end-to-end ML system design, covering scalable recommendation systems and safety-focused ad classification with...

ML System Design
10
0
95 people solved
Dec 9, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Ad Insertion Statistics for Two Methods

Ad Insertion Statistics for Two Feed Strategies You are comparing two ways of inserting ads into a 100-post feed. - Option A: Each post independently ...

Statistics & MathProbability
75
0
98 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Data Scientist

Design A/B Test for New Amazon Recommendation Module

Design A/B Test for New Amazon Recommendation Module A/B Test Design: Home Page Recommendation Module Scenario Amazon plans to introduce a new product...

Analytics & Experimentation
107
0
345 people solved
Aug 4, 2025
Zest AI logo
Zest AI
Hard
Data Scientist

Diagnose overfitting from error curves

You are evaluating a supervised machine learning model. You are shown a plot where the x-axis is training epoch or model complexity and the y-axis is ...

Machine Learning
4
0
46 people solved
Apr 5, 2026
Uber logo
Uber
Medium
Software Engineer

Design Stock Price Alerts

Design a stock price alert system that allows users to create alerts for securities and receive notifications when the market price crosses a specifie...

System DesignReal-Time Systems
13
0
236 people solved
Dec 28, 2025
Point72 logo
Point72
Medium
Quantitative Researcher

Encode Categorical Variables Across Model Families

Encode Categorical Variables Across Model Families A nominal feature has K categories. Explain how many dummy variables you would use in a linear regr...

Machine Learning
1
0
20 people solved
Jun 7, 2025
TikTok logo
TikTok
Medium
Software Engineer Locked

Solve common interview coding problems

This set evaluates algorithmic problem-solving, data structure selection, and time/space complexity analysis across common patterns such as maximum su...

Coding & AlgorithmsDynamic ProgrammingParsing & Interpreters
15
0
122 people solved
Feb 11, 2026
Apple logo
Apple
Medium
Data Scientist

Differentiate P-value and Confidence Interval in Statistics

Differentiate P-value and Confidence Interval in Statistics Statistics Knowledge Check (Onsite Data Scientist) Task Explain core inferential statistic...

Statistics & MathHypothesis Testing
10
0
118 people solved
Aug 4, 2025
Google logo
Google
Medium
Software Engineer

Handle Teammate Who Feels Pressured

An interviewer asks: suppose one of your teammates is often underperforming and tells others that your pace and work style make them feel pressured. H...

Behavioral & LeadershipConflict & CollaborationMentoring & Team Growth
10
0
141 people solved
Feb 22, 2026
Zillow logo
Zillow
Medium
Machine Learning Engineer

Implement k-th largest in a number stream

You are designing a small library to monitor statistics over a stream of integers. Implement a data structure that, given an integer k and an initial ...

Coding & Algorithms
4
0
45 people solved
Sep 24, 2025
TikTok logo
TikTok
Hard
Software Engineer

Explain Kafka architecture and reliability semantics

Explain Kafka architecture and reliability semantics Kafka Architecture and End-to-End Semantics You are asked to explain Kafka's core architecture an...

System Design
6
0
70 people solved
Jul 15, 2025
Visa logo
Visa
Medium
Machine Learning Engineer

Answer RAG, Transformer, And Fraud Metric Fundamentals

Prepare for a machine learning interview that asks rapid conceptual questions about retrieval-augmented generation, neural network architectures, and ...

Machine Learning
1
0
27 people solved
Apr 7, 2026
DoorDash logo
DoorDash
Easy
Software Engineer Locked

Design a Real-Time Monitoring System

This question evaluates a candidate's system design and distributed-systems competencies, focusing on scalable time-series ingestion, storage, query, ...

System Design
5
0
66 people solved
Jan 4, 2026
Meta logo
Meta
Hard
Data Scientist

Determine Demand for WhatsApp Group Video-Calls

Determine Demand for WhatsApp Group Video Calls WhatsApp is considering launching group video calls. Assume the feature does not currently exist, but ...

Analytics & Experimentation
71
0
218 people solved
Jul 12, 2025
TikTok logo
TikTok
Medium
Software Engineer

Compute rooms and verify tree completeness

This question has two independent algorithm problems on a single calendar/tree theme. Treat each Part as a self-contained coding exercise: implement a...

Coding & Algorithms
4
0
76 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Detect duplicate files by content

Detect duplicate files by content in a filesystem. Given access to a directory tree, return groups of file paths that have identical byte content. Min...

Coding & Algorithms
15
0
232 people solved
Aug 1, 2025
Amazon logo
Amazon
Medium
Software Engineer

Validate 9x9 grid in one pass

Validate 9x9 grid in one pass Given a partially filled 9x9 board using digits '1'–'9' and '.' for empty cells, determine whether the current configura...

Coding & Algorithms
8
0
84 people solved
Aug 9, 2025
TikTok logo
TikTok
Medium
Machine Learning EngineerNew Grad

Explain overfitting, dropout, normalization, RL post-training

Machine Learning fundamentals Answer the following: 1. What is overfitting? How can it be mitigated in machine learning? 2. Narrowing to deep learning...

Machine LearningNeural Networks & TrainingML Fundamentals
18
0
144 people solved
Feb 12, 2026
Meta logo
Meta
Medium
Data Scientist

Convince Product Manager to Launch 'Show Similar Products' Button

Convince a PM to Test a "Show Similar Products" Button Instagram is considering adding a "Show similar products" button on product-tagged content to b...

Analytics & Experimentation
6
0
62 people solved
Jul 12, 2025
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