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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
DoorDash logo
DoorDash
Medium
Machine Learning Engineer

Design a scalable recommendation serving system

Scenario You are designing the online serving infrastructure for a large-scale recommendation system (e.g., a delivery app or e-commerce feed). The in...

System DesignMLOps & Model ServingCaching
11
0
198 people solved
Oct 17, 2025
Shopify logo
Shopify
Hard
Data Scientist

Calculate Pirated Usage and Revenue Loss

You are analyzing theme piracy on an e-commerce platform. Assume the analysis window is 2023-01-01 through 2023-12-31, all timestamps are stored in UT...

Data Manipulation (SQL/Python)SQL
24
0
235 people solved
Jan 12, 2026
Reddit logo
Reddit
Easy
Data Scientist Locked

Measure impact of ads-manager automation feature

This question evaluates competency in causal impact measurement, experimental design, metric selection, monitoring instrumentation, and bias identific...

Analytics & Experimentation
10
0
94 people solved
Dec 11, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Evaluate New Feed-Ranking Algorithm with A/B Testing

A/B Test a New Feed-Ranking Algorithm A social-media company wants to evaluate a new feed-ranking algorithm intended to increase daily active minutes ...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
89
0
342 people solved
Jul 12, 2025
DoorDash logo
DoorDash
Hard
Data Scientist

Explain interest and influence stakeholders

Behavioral & Leadership (STAR) — Data Scientist, Marketplace Context You are interviewing onsite for a Data Scientist role focused on a multi‑sided ma...

Behavioral & LeadershipLeadership & Influence
15
0
192 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Boost App Installs: Analyze and Experiment with Conversion Funnel

Mobile Web Order to App Install Funnel and Experiments Many users place orders through mobile web but never install the native app. The company wants ...

Analytics & ExperimentationUser Behavior & FunnelsExperiment Design (A/B Testing)
28
0
126 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Choose threshold under asymmetric costs

You own a credit-card fraud classifier deployed as a probability scorer. Choose an operating threshold under asymmetric costs and justify it quantitat...

Machine Learning
8
0
77 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Market Sizing & Product Metrics Drill

Estimation and Product Metrics Drill Provide best-effort estimates using clear assumptions. Give a single-number answer and a justified range for esti...

Product / Decision Making
23
0
103 people solved
Jul 4, 2025
Reevo logo
Reevo
Medium
Software Engineer

Count all palindromic substrings

Given a string s, count how many substrings of s are palindromes. - A substring is a contiguous block of characters. - A palindrome reads the same for...

Coding & Algorithms
7
0
48 people solved
Feb 2, 2026
Meta logo
Meta
Medium
Data Scientist

Write advanced SQL for sales support analytics

Write SQL for the following schema and tasks. Assume ANSI SQL with DATE_TRUNC and INTERVAL supported. Sample tables (minimal rows shown). accounts +--...

Data Manipulation (SQL/Python)
2
0
28 people solved
Oct 13, 2025
Netflix logo
Netflix
Hard
Software Engineer

How do you give and receive feedback?

Behavioral questions about feedback: 1) Tell me about a time you had to give constructive feedback to a teammate or cross-functional partner (e.g., PM...

Behavioral & LeadershipConflict & CollaborationSelf-Awareness & Growth
55
0
391 people solved
Mar 9, 2026
Moloco logo
Moloco
Hard
Software Engineer

Compute subarray span for each element

You are given an integer array nums of length n. For each index i (0 <= i < n), define ans[i] as the maximum possible length of a contiguous subarray ...

Coding & Algorithms
10
0
91 people solved
Nov 9, 2025
Point72 logo
Point72
Medium
Quantitative Researcher

Compare Missing-Value Strategies for Linear Models

Compare Missing-Value Strategies for Linear Models A continuous feature has missing values in a linear prediction problem. Compare three treatments: m...

Machine Learning
3
0
28 people solved
Jun 7, 2025
PayPal logo
PayPal
Easy
Data Scientist

Reduce airport ride cancellations under causal constraints

Question You are a Data Scientist supporting an airport rides / airport pickups team at a ride-hailing marketplace. Airport pickups are operationally ...

Analytics & Experimentation
5
0
68 people solved
Nov 3, 2025
DoorDash logo
DoorDash
Medium
Product Manager

Amazon Average Order Value: Levers, Sizing and Guardrails for Doubling Basket Size

As a product manager on Amazon's online store, how would you make the average customer cart worth twice as much within six months? `hint Break the met...

Product Design & StrategyGrowth & MonetizationExperiment Design (A/B Testing)
0
0
4 people solved
Aug 12, 2026
Rakuten logo
Rakuten
Medium
Product Manager

How Publishers Sell Ad Inventory: Direct Deals, Ad Networks and Programmatic Exchanges

As a product manager working on advertising products at Rakuten, explain the main ways a publisher earns money from its ad inventory. For each one, de...

Software Engineering FundamentalsGrowth & MonetizationAds Systems
1
0
11 people solved
Jun 17, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Explain AUC, activations, ensembles, and imbalance

Machine Learning Metrics and Modeling Choices — Multi-part You are given model scores and binary labels for a small dataset and asked to compute ROC A...

Machine LearningModel EvaluationML Fundamentals
20
0
140 people solved
Oct 13, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Recommend movies by shared ratings

Recommend movies by shared ratings Write a function recommendations(user, ratings) that returns a list of movies to recommend to the given user based ...

Coding & AlgorithmsGraphsArrays & Strings
10
0
106 people solved
Aug 7, 2025
Schneider Electric logo
Schneider Electric
Medium
Software EngineerIntern

Compare JavaScript == and === operators

In JavaScript, what is the difference between the == and === operators? Explain: 1. How each operator compares two values. 2. What type coercion is an...

Software Engineering Fundamentals
4
0
51 people solved
Dec 8, 2025
Amazon logo
Amazon
Medium
Product Manager

Make the Case for an Amazon Product You Admire: Users, Design Choices and Metrics

You are interviewing for a product manager role and are asked to pick your favorite Amazon product and explain why it is your favorite. `hint Argue li...

Product Design & StrategyProduct Sense
0
0
8 people solved
Oct 22, 2025
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