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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
Meta logo
Meta
Medium
Data Scientist

Determine High-Quality Notifications with CTR Analysis

Determine High-Quality Notifications with CTR Analysis Push Notification Quality: Metric, Baseline Assessment, and Experiment Design Background A mobi...

Analytics & Experimentation
8
0
63 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Forecast and Analyze DoorDash Menu Price Inflation Gap

Forecast and Analyze DoorDash Menu Price Inflation Gap DoorDash wants to understand and forecast the difference between on-platform menu prices and th...

Statistics & MathTime Series & ForecastingSampling & Estimation
13
0
130 people solved
Aug 4, 2025
Google logo
Google
Medium
Product Manager

Fermi Sizing Exercise: Dentist Count for New York

Estimate the number of dentists in New York. Lay out how you structure the estimate, call out each assumption, and end with a figure and a sense of ho...

Product / Decision MakingEstimation & Market Sizing
0
0
6 people solved
Oct 20, 2023
Google logo
Google
Hard
Data Scientist Locked

Analyze time series and design validation experiment

This question evaluates competency in time series analysis, change-point detection, count-based forecasting, causal inference and experiment design, a...

Analytics & ExperimentationTime Series & ForecastingCausal Inference
13
0
119 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Facebook cost-per-new-user estimate, production database move plan, LinkedIn home revamp

An interviewer asks three unrelated questions in a row: an estimate, a technical execution question and a product improvement question. Answer each on...

Product Design & StrategyEstimation & Market SizingProduct Design & Improvement
0
0
6 people solved
Sep 10, 2024
Salesforce logo
Salesforce
Medium
Product Manager

Children's Bookcase Concept: Product Design From User Needs to a First Version

You are asked to design a bookshelf for children. Decide which children it serves first, what it does that an ordinary bookshelf does not, and what go...

Product Design & StrategyProduct Sense
0
0
5 people solved
Dec 10, 2023
Raiffeisenbank logo
Raiffeisenbank
Hard
Machine Learning Engineer

Python GIL, Async vs Threads, and Multiplying Two 2 GB NumPy Matrices in 8 GB RAM

Answer three Python questions from the same screen: what the GIL is and whether Python has parallelism, whether multiplying two 2 GB dense NumPy matri...

Software Engineering FundamentalsProgramming LanguagesConcurrency
0
0
1 people solved
Apr 15, 2026
Google logo
Google
Medium
Product Manager

Fitbit PM: justify a key success metric, then build a feature that raises it

You are the product manager for Fitbit. Pick the one metric you would care about most, explain why it deserves that place, and then describe a feature...

Analytics & ExperimentationMetrics & KPIsProduct Design & Improvement
0
0
6 people solved
Jan 10, 2024
Meta logo
Meta
Medium
Data Scientist

Calculate Survey Response Rate and Quality Metric in SQL

survey_responses +---------+----------+---------------------+---------------------+-------+ | user_id | survey_id| impression_ts | click_ts ...

Data Manipulation (SQL/Python)
71
0
180 people solved
Jul 12, 2025
Tencent logo
Tencent
Medium
Data Scientist

Implement robust k-means with k-means++ initialization

Implement from scratch in Python (no scikit‑learn) a function kmeans(X, k, max_iter=300, tol=1e-4, random_state=0) that returns (centroids, labels). R...

Coding & AlgorithmsUnsupervised LearningML Coding
7
0
109 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Product design: a kid-friendly way to create, store and recover passwords

Design a tool that helps children manage their passwords. Explain who it is for, the problems it solves and what you would build first. `hint Let age ...

Product Design & StrategyProduct SensePrivacy & Compliance
0
0
4 people solved
Apr 6, 2024
Nash AI logo
Nash AI
Medium
Software Engineer

Design OOD for probabilistic Minesweeper

Design OOD for probabilistic Minesweeper Object-Oriented Design: Minesweeper with Per-Cell Mine Probabilities Context Design an object-oriented Minesw...

System Design
9
0
62 people solved
Jul 26, 2025
OpenAI logo
OpenAI
Medium
Product Manager

Walking Through a Past Project You Owned, From Problem to Measured Result

Walk me through one project from your experience: what problem it addressed, what your part in it was, and how it ended. `hint Pick for ownership Choo...

Behavioral & LeadershipProject Deep Dive
0
0
6 people solved
Apr 21, 2025
Microsoft logo
Microsoft
Medium
Product Manager

Universal-design microwave that every household member, young or old, can operate

Design a microwave oven for home kitchens that every member of the household can operate on their own. Explain whom you are designing for, what gets i...

Product Design & StrategyAccessibility & Inclusive DesignProduct Sense
0
0
5 people solved
Aug 12, 2024
Google logo
Google
Medium
Product Manager

Cutting Chrome's Battery Drain on Phones: Find the Causes and Prioritize Fixes

The Chrome team wants the browser to drain less battery on mobile phones while people are using it. As the product manager, explain how you would tack...

Product Design & StrategyTechnical Tradeoffs for PMsExperiment Design (A/B Testing)
0
0
6 people solved
Nov 14, 2023
Google logo
Google
Medium
Product Manager

Adapting communication to different stakeholder groups on a project you led

Pick a project you led recently that involved several different kinds of stakeholders, for example executive sponsors, engineering and design, sales o...

Behavioral & LeadershipCommunication & Stakeholders
1
0
7 people solved
Oct 23, 2025
Meta logo
Meta
Medium
Software Engineer

Solve array merge and tree flattening problems

Solve array merge and tree flattening problems 1) Given two sorted arrays, merge them into a single sorted array. Provide both an in-place approach (w...

Coding & Algorithms
2
0
47 people solved
Aug 9, 2025
Google logo
Google
Medium
Product Manager

Behavioral: How a PM Gets Ready for a Cross-Functional Launch Meeting

You are the product manager, and you are about to walk into the launch meeting for your product with every stakeholder present. Walk through how you w...

Behavioral & LeadershipCommunication & StakeholdersRequirements & Launch Execution
0
0
6 people solved
Dec 25, 2023
Meta logo
Meta
Medium
Product Manager

Launch or Hold a Share-Feature Change When Its A/B Test Reports 20% Usage

Your team has changed how the "Share" feature works and is evaluating the change in an A/B test. Reviewing the results, you see that the feature's usa...

Analytics & ExperimentationExperiment Analysis & ReadoutLaunch Evaluation
0
0
5 people solved
Apr 8, 2024
Meta logo
Meta
Hard
Data Scientist

Resolve teammate feeling unwelcome with measurable steps

Behavioral Scenario: Psychological Safety Concern Within a Subgroup You are a senior individual contributor or team lead on a remote-first data team. ...

Behavioral & Leadership
9
0
77 people solved
Oct 13, 2025
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