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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
C3 AI logo
C3 AI
Medium
Data Scientist

Decompress an encoded string

Decompress an encoded string Given an encoded string, return its decoded (decompressed) form. Use the following encoding rule: - A positive integer \(...

Coding & Algorithms
6
0
79 people solved
Jul 25, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer Locked

Count islands by requested sizes

This question evaluates a candidate's understanding of grid connectivity, identification of connected components, and the ability to aggregate compone...

Coding & AlgorithmsGrids & MatricesGraphs
25
0
179 people solved
Jan 22, 2026
TikTok logo
TikTok
Medium
Product Manager

Amazon Customer Churn: Find Where Shoppers Leave and Fix the Journey

You are a product manager at Amazon and learn that customers are leaving. Explain how you would improve their journey and overall experience to revers...

Analytics & ExperimentationMetric DiagnosticsProduct Design & Improvement
0
0
4 people solved
Jul 14, 2025
Carta logo
Carta
Medium
Product Manager

Product Design of a Restaurant Data Integration API for Uber Eats

You are a product manager at Uber Eats. Restaurants need a programmatic way to send their own data into the Uber Eats platform. Design the APIs that m...

Product Design & StrategyPlatform & API ProductsAPI Design
1
0
11 people solved
Jan 5, 2026
Flipkart logo
Flipkart
Medium
Product Manager

Define metrics for missing assortment on Flipkart and plan how to close those gaps

You are a product manager at Flipkart. Explain how you would measure selection gaps on the marketplace, meaning cases where shoppers come for somethin...

Product Design & StrategyMetrics & KPIsPrioritization & Tradeoffs
1
0
10 people solved
Apr 30, 2025
Morgan Stanley logo
Morgan Stanley
Medium
Data Scientist Locked

Explain Your Risk Analytics Work to a Recruiter

Practice a recruiter-ready explanation of risk analytics work that starts with the decision, translates methods into plain language, and makes individ...

Behavioral & Leadership
1
0
22 people solved
Jul 10, 2026
Meta logo
Meta
Medium
Software Engineer

Find buildings with rightward view

Find buildings with rightward view You are given an array of building heights aligned along a street that faces the ocean to the right. Return the ind...

Coding & Algorithms
7
0
59 people solved
Aug 7, 2025
Snapchat logo
Snapchat
Medium
Product Manager

Build a revenue strategy for TikTok across ads, commerce and creators

How would you have TikTok make money? Propose a monetization strategy and say what you would prioritize. `hint Count the sides The app has viewers, cr...

Product Design & StrategyGrowth & MonetizationProduct Strategy
0
0
5 people solved
Jan 13, 2025
Meta logo
Meta
Hard
Data Scientist

Compute sample size and test duration correctly

Powering Two Online Experiments: Sample Size, Duration, and Design Defenses You are designing experiments to improve a friend-accept rate metric in a ...

Statistics & Math
4
0
90 people solved
Oct 13, 2025
HubSpot logo
HubSpot
Hard
Software Engineer

Design a weather aggregation system

Design a weather aggregation system System Design: Weather Data Aggregation (10-minute Updates) Context Build a service that periodically fetches weat...

System DesignSystem Design FundamentalsAPI Integration & HTTP Clients
10
0
145 people solved
Jul 31, 2025
Google logo
Google
Medium
Product Manager

Duplicate-site detection for a web search anti-spam team

You are a product manager on the Google Search team responsible for fighting web spam. How would you detect duplicate websites? Walk through what you ...

System DesignTrust & SafetyTechnical Tradeoffs for PMs
1
0
10 people solved
Dec 12, 2023
Adobe logo
Adobe
Medium
Product Manager

Find an Unmet Need Among iPhone Users and Propose an iOS Improvement

Imagine you are the product manager responsible for iOS, the operating system that runs Apple's iPhone. How would you improve it? Choose the users the...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
11 people solved
Aug 18, 2025
Google logo
Google
Medium
Product Manager

Fermi estimate of YouTube's video storage footprint in exabytes

You are interviewing for a product manager role at Google. Estimate how much storage YouTube needs to hold every video on the platform. Explain your a...

Product / Decision MakingEstimation & Market Sizing
0
0
9 people solved
Sep 16, 2025
Instacart logo
Instacart
Hard
Software Engineer Locked

Implement worker time and payroll tracker

This question evaluates skills in designing in-memory data structures and algorithms for temporal event handling, interval arithmetic, stateful toggle...

Coding & AlgorithmsData Structure DesignIntervals & Scheduling
36
0
307 people solved
Feb 11, 2026
Hard
Software Engineer

Implement a multi-button click detector

Implement a click detector for multiple physical buttons. You receive button state updates as a stream. Each update provides: - button_id (integer) - ...

Coding & Algorithms
8
0
69 people solved
Feb 3, 2026
Wells Fargo logo
Wells Fargo
Medium
Data Scientist

Discuss logistic regression limitations for PD

Discuss logistic regression limitations for PD Limitations of Logistic Regression for PD (Probability of Default) Modeling Context You are building a ...

Machine Learning
4
0
57 people solved
Jul 26, 2025
Meta logo
Meta
Medium
Product Manager

Zoom Product Improvement: Choose a Segment, Find Pain Points, Prioritize a Fix

Zoom is one of the most widely used video meeting products. Propose how you would improve it: choose the users you would build for, explain what gets ...

Product Design & StrategyProduct Design & Improvement
0
0
6 people solved
Dec 30, 2024
Meta logo
Meta
Medium
Software Engineer Locked

Implement cd and merge intervals

This question evaluates proficiency in filesystem path normalization (string parsing, tokenization, and edge-case handling) and interval-merging algor...

Coding & Algorithms
4
0
76 people solved
Jan 16, 2026
Uber logo
Uber
Hard
Data Scientist Locked

Design and Evaluate an Experiment on Surge

This question evaluates experiment design, causal inference, power analysis, and implementation skills relevant to pricing and supply experiments in a...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
10
0
87 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a CI/CD system with live log streaming

This question evaluates a candidate's ability to design scalable CI/CD architectures including shell-script job orchestration, DAG-aware scheduling, r...

System DesignJob Scheduling & WorkflowsReal-Time Systems
23
0
295 people solved
Dec 15, 2025
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