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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
TikTok logo
TikTok
Medium
Data Scientist Locked

Design a creator posting-frequency experiment

Design an experiment to test whether a push or email nudge raises how often creators post on a short-video platform, covering metrics, randomization, ...

Analytics & Experimentation
6
0
49 people solved
Oct 13, 2025
Flipkart logo
Flipkart
Medium
Product Manager

Product Sense Case: Helping Badminton Players Find Partners and Games

As a product manager, design a product that brings badminton players together. Decide who the product is for, which problems it solves for them, and w...

Product Design & StrategyProduct SenseGrowth & Monetization
0
0
5 people solved
Feb 7, 2025
Meta logo
Meta
Medium
Product Manager

Accessible messaging app for blind people: users, core flows and metrics

Design a messaging app in the spirit of WhatsApp for people who are blind. Decide exactly who you are designing for, what the app must let them do, an...

Product Design & StrategyAccessibility & Inclusive Design
0
0
4 people solved
Dec 13, 2023
Expedia logo
Expedia
Hard
Data Scientist

Choose KPIs and prove impact with experiments

Expedia Search: Profit-Focused Ranking Launch (Onsite) Context You’re on the Search team launching a new hotel-ranking model for enterprise clients wh...

Analytics & Experimentation
7
0
80 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Product Manager

Build a Podcast Discovery Experience That Helps Listeners Find Episodes Worth Their Time

You are asked to design a product that helps people get good podcast recommendations. The prompt is deliberately open: decide who the product serves, ...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
6 people solved
Sep 23, 2025
Tubi logo
Tubi
Medium
Data Scientist

Explain p‑values to a product manager

Interpreting a Two-Sided A/B Test p-value of 0.03 You ran a two-sided A/B test on conversion rate. Results: - Baseline (control) conversion: 5.0% - Ob...

Statistics & Math
5
0
74 people solved
Oct 13, 2025
Square logo
Square
Medium
Data Scientist

Build referral chains and detect cycles

You are given a directed referral graph where each user may have at most one referrer. Input file 'referrals.csv' has columns: user_id (INT), referred...

Coding & AlgorithmsGraphsData Cleaning & Wrangling
15
0
124 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Data Scientist

Differentiate LDA and QDA; compute boundary

Binary Gaussian Classification: LDA vs QDA You are modeling a 2D binary Gaussian classifier with features (x, y): - Class 0: mean μ0 = (0, 0), covaria...

Statistics & Math
12
0
88 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Machine Learning Engineer

How would you prevent wrong items in deliveries?

Behavioral / Product-Process Scenario You work on a food delivery platform. Customers sometimes receive the wrong items (restaurant packed incorrectly...

Behavioral & LeadershipProduct Design & ImprovementMetric Diagnostics
7
0
139 people solved
Oct 17, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Design cross-validation; explain bias–variance

Define cross-validation rigorously and compare k-fold, stratified k-fold, leave-one-out, nested CV, and time-series rolling/blocked CV. For a dataset ...

Statistics & Math
10
0
83 people solved
Oct 13, 2025
Tencent logo
Tencent
Medium
Data Scientist

Compute per-player daily cumulative games with windows

Write a SQL query to output, for each player_id and each calendar date present in the data, the cumulative number of games played up to and including ...

Data Manipulation (SQL/Python)
1
0
18 people solved
Oct 13, 2025
Capital One logo
Capital One
Easy
Data Scientist

Differentiate fixed and variable costs with examples

Unit Economics: Fixed vs. Variable Costs in a Subscription Streaming Business Task - Define fixed cost vs. variable cost for a subscription streaming ...

Statistics & Math
13
0
123 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Judge which currently hyped tech product lacks staying power and defend the prediction

In a product manager interview, you are asked to name a technology product that is getting a lot of attention right now but that you expect to be larg...

Product Design & StrategyProduct SenseMarket & Competitive Analysis
0
0
7 people solved
Sep 30, 2025
Amazon logo
Amazon
Hard
Data Scientist

Root-cause an incident and drive consensus

Root-Cause Plan: Sudden Drop in Voice Checkout Conversion (Alexa Shopping) You are informed that the "voice checkout conversion" KPI for Alexa Shoppin...

Behavioral & Leadership
10
0
80 people solved
Oct 13, 2025
CVS Health logo
CVS Health
Medium
Data Scientist Locked

Tune classifier and compute key metrics

This question evaluates practical proficiency in classifier evaluation, threshold tuning, precision/recall trade-offs, cost-sensitive decision rules, ...

Machine LearningModel EvaluationSupervised Learning
10
0
93 people solved
Oct 13, 2025
Roblox logo
Roblox
Hard
Data Scientist Locked

Design and analyze an ads ranking experiment

This question evaluates a data scientist's experimental-design and causal-inference skills applied to ad ranking, including sample-size estimation, va...

Analytics & Experimentation
9
0
89 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Product Manager

Choosing a North-Star Metric and Guardrails for Instagram's Shopping Features

Instagram Shopping is the group of features that lets brands and creators tag products in their posts, Reels and stories and gives a business a shop o...

Analytics & ExperimentationMetrics & KPIsUser Behavior & Funnels
0
0
7 people solved
Oct 18, 2025
Flipkart logo
Flipkart
Medium
Product Manager

Oyo budget hotels: a product plan to reduce churn and drive repeat use

You are a product manager at Oyo Rooms, the budget hotel booking brand, and your task is to increase retention. Define what retention should mean for ...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
0
0
4 people solved
Mar 25, 2024
Cargurus logo
Cargurus
Medium
Product Manager

Root-Causing Lower Car-Shopper Conversion in CarGurus Canada Versus the US

You are a PM at CarGurus. Eight months after the company launched in Canada, the Canadian site converts at a lower rate than the US one. How do you fi...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
0
0
3 people solved
Nov 13, 2025
Meta logo
Meta
Medium
Product Manager

Delivering a Project Without Enough People, Budget or Time

The interviewer asks for a real example from your work: a project that was missing something it needed, such as engineering capacity, budget, time or ...

Behavioral & LeadershipOwnership & ExecutionPrioritization & Tradeoffs
0
0
5 people solved
Mar 4, 2025
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