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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
Hard
Data Scientist

Define and apply Gmail user segments

Question Gmail wants to create actionable user segments to drive both product improvements and marketing/lifecycle outcomes. Propose a segmentation sc...

Analytics & ExperimentationSegmentation & Cohort AnalysisExperiment Design (A/B Testing)
9
0
139 people solved
Oct 13, 2025
Google logo
Google
Medium
Software Engineer

Design log management with auto-deletion

Design log management with auto-deletion Design a Bounded Log Management System with O(1) Victim Selection Context You are designing an in-memory log ...

System DesignData Structure DesignHeaps & Priority Queues
10
0
132 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Software EngineerSenior+ Locked

Design a Scalable Notification Service

Design a scalable multi-channel notification service with durable ingestion, explainable filtering, retry-safe delivery, quotas, and extensible provid...

System Design
6
0
55 people solved
Aug 12, 2026
Shopify logo
Shopify
Medium
Data Scientist

Diagnose Weekly Session Conversion Anomalies

You are a Data Scientist supporting an e-commerce platform. You receive a weekly time-series dashboard covering the past three years. The dashboard in...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
22
0
192 people solved
Apr 3, 2026
Google logo
Google
Medium
Data Scientist

Build and evaluate a full ML pipeline

You must predict both (1) probability that a user will spend >$0 in the next 7 days (classification) and (2) expected spend in the next 7 days (regres...

Machine LearningML System DesignFeature Engineering
17
0
173 people solved
Oct 13, 2025
Paramount Commerce logo
Paramount Commerce
Hard
Software Engineer

Design a Go music player with playlists

Design and Implement an Object-Oriented Music Player in Go You are asked to design and implement a small, object-oriented music management and playbac...

System DesignLow-Level Design (OOP)Concurrency
14
0
98 people solved
Sep 6, 2025
Reddit logo
Reddit
Medium
Product Manager

Executive Dashboard Metrics for Airbnb's Launch in a New Market

Airbnb is about to launch in a region where it has never operated. What success metrics would you put on a one-page dashboard for the executive team? ...

Analytics & ExperimentationMetrics & KPIs
0
0
8 people solved
Feb 28, 2026
Capital One logo
Capital One
Medium
Product Manager

Building Real-Time Spend Controls for Capital One Virtual Debit Cards

You are a product manager at Capital One, where customers can create virtual debit cards. What technical components would the bank need so that custom...

System DesignTechnical Tradeoffs for PMsPayments & Ledgers
2
0
15 people solved
Apr 8, 2025
TripStack logo
TripStack
Medium
Software Engineer

Compute minimum resources for overlapping intervals

You are given n tasks as half-open time intervals [start, end) on a single day. Determine the minimum number of identical servers needed so that no tw...

Coding & Algorithms
13
0
93 people solved
Sep 6, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Data Scientist

Solve relative-truth cat puzzle

Logic Puzzle: Directed Truth/Lie Rule and Cat Counts Three people (Asta, Bronya, Clara) each own a different number of cats (positive integers). When ...

Statistics & MathPuzzles & Brainteasers
33
0
266 people solved
Aug 11, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Identify Challenges and Solutions for Bike-Delivery Program

Identify Challenges and Solutions for a Bike-Delivery Program A food-delivery platform is considering a bike-based delivery option for couriers in sel...

Behavioral & LeadershipProduct StrategyBusiness Case Analysis
24
0
169 people solved
Jul 12, 2025
Robinhood logo
Robinhood
Medium
Software Engineer Locked

Design a Fault-Tolerant Distributed Job Scheduler

Design a distributed job scheduler with durable acceptance, due-time sharding, queue dispatch, worker leases, heartbeats, retries, and status queries....

System Design
3
0
40 people solved
Jun 22, 2026
Meta logo
Meta
Easy
Data Scientist Locked

How would you evaluate pixel-issue notifications?

This question evaluates a data scientist's skills in experimentation design, metric framework development, causal inference, and measurement-aware ana...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
12
0
122 people solved
Feb 18, 2026
Capital One logo
Capital One
Medium
Data Scientist

Evaluate Groupon's Impact on Restaurant's Profitability and Strategy

Evaluating a Groupon-Style Deal for a Restaurant You own a restaurant, and a Groupon-style deals website proposes selling discount vouchers for your v...

Analytics & ExperimentationBusiness Case AnalysisGrowth & Monetization
119
0
382 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Product Manager

Closing the Gap Between a Two-Week Deadline and a Four-Week Engineering Estimate

You are a product manager responsible for delivering a new product feature. The engineering team estimates the work at four weeks, but your stakeholde...

Product / Decision MakingPrioritization & TradeoffsCommunication & Stakeholders
1
0
15 people solved
Nov 25, 2025
Google logo
Google
Medium
Machine Learning Engineer

Describe your proudest project

Behavioral prompt: Describe the project you are most proud of (Machine Learning Engineer) Provide a concise, technical, leadership-focused walkthrough...

Behavioral & LeadershipProject Deep Dive
11
0
137 people solved
Sep 6, 2025
Cloudflare logo
Cloudflare
Easy
Software Engineer

Explain motivation for joining a company

You are interviewing for a software engineering role at an Internet infrastructure company (for example, a CDN and DDoS mitigation provider like Cloud...

Behavioral & Leadership
7
0
58 people solved
Dec 8, 2025
Applied Intuition logo
Applied Intuition
Medium
Machine Learning Engineer

Implement correct attention masking

Autoregressive Transformer: Correct Attention Masking with Padding Context: You are implementing decoder self-attention for an autoregressive Transfor...

Machine LearningTransformers & AttentionML Coding
8
0
174 people solved
Sep 6, 2025
Apple logo
Apple
Medium
Software Engineer

Reduce False Failures and Classify QA Outcomes

As a Software QA Engineer, how would you reduce false failures in a regression suite whose correct executions may not produce identical outputs? Then ...

Software Engineering FundamentalsTesting & QualityDebugging
4
0
34 people solved
Mar 27, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Compare How Models Respond to Multicollinearity

Compare How Models Respond to Multicollinearity Compare multicollinearity in unregularized linear regression, L1-regularized linear regression, a deci...

Machine LearningRegression & Statistical ModelingSupervised Learning
2
0
24 people solved
Sep 15, 2026
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