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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
CVS Health logo
CVS Health
Hard
Data Scientist

Lead structured response to accuracy incident

Incident Response Plan: Spike in Incorrect Payments for CA Users Aged 18–24 Scenario Since 00:00 today, the share of incorrect payments for users aged...

Behavioral & LeadershipMetric DiagnosticsModel Monitoring & Drift
7
0
108 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Resolve Conflicts Between Data Findings and Team Opinions

Resolve Conflicts Between Data Findings and Team Opinions Behavioral Scenario: Resolving Conflicts Between Data Findings and Team Beliefs Scenario You...

Behavioral & Leadership
11
0
86 people solved
Aug 4, 2025
Netflix logo
Netflix
Medium
Data Scientist Locked

Design experiment on culture memo emphasis

This question evaluates competency in experimental design and statistical analysis for product metrics, covering hypothesis specification, randomizati...

Analytics & Experimentation
6
0
66 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Identify Causes and Validate Web Product Performance Drop

Identify Causes and Validate Web Product Performance Drop Scenario Daily active users (DAU) and conversion rate for a web product unexpectedly drop. T...

Analytics & Experimentation
7
0
52 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Detect cycles and order with DFS

You are given a directed graph of package dependencies represented as an adjacency list: Map<String, List<String>> deps where deps[p] lists packages t...

Coding & Algorithms
6
0
80 people solved
Sep 6, 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
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
Meta logo
Meta
Medium
Data Scientist

Design and analyze a group-calls experiment

You are considering launching Group Video Calls. Answer all parts precisely; justify choices with pros/cons and formulas where relevant. 1) Clarify CT...

Analytics & Experimentation
2
0
44 people solved
Oct 13, 2025
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
Meta logo
Meta
Hard
Data Scientist

Design a Restaurant Recommendation System for Food Apps

Design a Restaurant Recommendation System for a Food-Ordering App You are designing an end-to-end recommendation system that suggests restaurants to u...

Machine Learning
36
0
116 people solved
Jul 12, 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
Amazon logo
Amazon
Medium
Software Engineer

Detect words formed by multiple dictionary parts

Given an array words of up to 100,000 non-empty lowercase strings (total characters ≤ 1,000, 000), return all strings that can be formed by concatenat...

Coding & Algorithms
4
0
67 people solved
Sep 6, 2025
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
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Summarize impact and lessons from your resume

Give a concise 90-second overview tailored to this role. Then deep-dive one project where you changed a business decision using data: state the object...

Behavioral & Leadership
4
0
59 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Justify choosing JavaScript for interviews

If given a choice of language, why would you choose JavaScript for front-end interview coding? Compare trade-offs versus TypeScript or Python regardin...

Coding & Algorithms
8
0
61 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Schedule and cancel delayed payments

Question Extend an existing in-memory payment system (immediate transfers between accounts, plus a top-N spenders/payers leaderboard) with scheduled p...

System DesignData Structure DesignHeaps & Priority Queues
14
0
127 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Design a Real-Time Trending Hashtags System

Design the backend system that detects and serves trending hashtags from posts on a large social network (Facebook-scale). The service continuously in...

System Design
3
0
31 people solved
Mar 6, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Explain the Project You Are Most Proud Of

Present one completed project you are genuinely proud of, including why it mattered, what you personally owned, and the hardest trade-off. Separate te...

Behavioral & Leadership
1
0
14 people solved
May 22, 2026
Amazon logo
Amazon
Easy
Data Scientist

Find recommended friend pairs by shared listening

Problem (SQL) You work on a music app and want to recommend new friend connections based on listening similarity. Tables Assume the following schemas:...

Data Manipulation (SQL/Python)SQL
14
1
146 people solved
Nov 20, 2025
ByteDance logo
ByteDance
Easy
Software Engineer

Describe Over-Engineering and UX Wins

After a project deep dive, the interviewer asked two behavioral questions: 1. Describe a time when you designed or implemented something that became m...

Behavioral & Leadership
4
0
75 people solved
Feb 1, 2026
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