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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
Google logo
Google
Medium
Product Manager

YouTube Data Throughput Estimation

Estimation Challenge: YouTube Daily Data Streamed Estimate how much data YouTube streams to users worldwide in a typical 24-hour period. Walk through ...

Product / Decision MakingEstimation & Market Sizing
16
0
120 people solved
Jul 4, 2025
Medium
Software Engineer

Explain Encapsulation through an Object Invariant

What is data encapsulation in Java, and how does it help keep an object valid? Give a concrete example rather than only listing private fields, getter...

Software Engineering FundamentalsLow-Level Design (OOP)Programming Languages
0
0
8 people solved
Jan 14, 2026
OpenAI logo
OpenAI
Medium
Data Scientist

Determine Metrics to Measure Free-Trial Impact on Subscriptions

Determine Metrics to Measure Free-Trial Impact on Subscriptions A/B Test: Free Trial Offer Impact on Subscription Behavior Scenario You are analyzing ...

Analytics & ExperimentationExperiment Design (A/B Testing)
65
0
197 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Software EngineerSenior+

Demonstrate leadership and team development

Demonstrate leadership and team development Behavioral & Leadership: End-to-End Project Leadership (L5-level) Context: This is a behavioral prompt oft...

Behavioral & Leadership
7
0
66 people solved
Jul 17, 2025
Meta logo
Meta
Medium
Software Engineer

Implement sparse vector dot product

Question Design a SparseVector class for vectors of integers in which most entries are zero, and support an efficient dot product between two such vec...

Coding & Algorithms
6
0
87 people solved
Aug 14, 2025
Verkada logo
Verkada
Medium
Frontend EngineerNew Grad Locked

Build a React dashboard with filters

This question evaluates frontend engineering skills in React, including component decomposition, controlled inputs and state management, semantic HTML...

Software Engineering Fundamentals
4
0
80 people solved
Jan 10, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Frequency Stack with Recency Tie-Breaking

Implement a frequency stack whose pop operation returns the most frequent value and breaks frequency ties by recency.

Coding & Algorithms
15
3
116 people solved
Aug 28, 2026
Meta logo
Meta
Medium
Product Analyst Locked

Write Call Analytics SQL Queries

This question evaluates SQL data manipulation and analytical competencies, including aggregation, joins between user and event tables, time-window fil...

Data Manipulation (SQL/Python)
4
0
34 people solved
Jan 28, 2026
Capital One logo
Capital One
Medium
Data Scientist

Model network-service unit economics and breakeven

A network service charges $40/month with the first 3 months free. Costs: variable service cost $25 per active month; one-time install cost $35 at acti...

Statistics & Math
5
0
98 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Applied Scientist Locked

Determine if all courses can be completed

This question evaluates graph-theoretic dependency modeling and cycle-detection competency, measuring the ability to represent course prerequisites as...

Coding & Algorithms
6
0
45 people solved
May 30, 2026
TikTok logo
TikTok
Medium
Machine Learning Engineer

Find and count target-sum subarrays

Find and count target-sum subarrays Given an integer array nums and an integer target, implement: ( 1) a function that returns true if any non-empty c...

Coding & Algorithms
9
0
76 people solved
Jul 31, 2025
Roblox logo
Roblox
Medium
Product Manager

Stopping Copied Avatar Items and Ripped 3D Assets on Roblox: An IP Protection Plan

You are a product manager at Roblox. How would you protect Roblox's intellectual property, meaning assets such as 3D models, character skins and avata...

Product Design & StrategyTrust & SafetyMetrics & KPIs
1
0
9 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Product Manager

Instagram Product Sense: Choose a Goal and Segment, Then Design One New Feature

You are a product manager at Instagram. Propose one new feature that would make Instagram better, and make the case for it: what goal it serves, who i...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
0
0
6 people solved
Jul 20, 2026
Meta logo
Meta
Hard
Data Scientist

Design bot detection and evaluate trade-offs

Bot-Detection System Design for Comment Activity Context You are designing and evaluating a machine learning system to detect automated (bot) comment ...

Machine Learning
5
0
77 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Design an Automated Home-Price Valuation Model

Design an Automated Home-Price Valuation Model Scenario You are building an automated house-price valuation service for a real-estate platform. Questi...

Machine Learning
66
0
238 people solved
Aug 4, 2025
Shopify logo
Shopify
Hard
Machine Learning Engineer

Design a baseline loan recommendation system

System Design: Baseline Loan Recommendation System Context Design a baseline system that recommends loan offers to users on a digital platform. The sy...

ML System DesignFairness & BiasRecommendation Systems
19
0
260 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer

Design faster delay-time computation

You are given an array of integers representing task priorities. Tasks execute from right to left. For each index i, define its delay time as j - i wh...

Coding & Algorithms
4
0
70 people solved
Sep 6, 2025
Dandy logo
Dandy
Medium
Machine Learning EngineerSenior+

Why do transformers struggle with long context?

In a transformer-based model, why is it difficult to process very long input context? Explain the main challenges in terms of computation, memory usag...

Machine LearningTransformers & AttentionLLM Inference & Serving
8
1
150 people solved
Apr 5, 2026
LinkedIn logo
LinkedIn
Easy
Machine Learning Engineer Locked

Explain overfitting vs underfitting and fixes

This question evaluates understanding of model generalization in supervised machine learning, focusing on the concepts of overfitting and underfitting...

Machine LearningML FundamentalsModel Evaluation
14
0
153 people solved
Feb 8, 2026
Optiver logo
Optiver
Medium
Data Scientist

Minimize moves to transform floor layouts

You are given an initial arrangement of apartments across Floors 1–4 and a target arrangement. In one move you may reposition a single apartment to a ...

Coding & AlgorithmsGreedy
5
0
101 people solved
Sep 6, 2025
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