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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
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Find minimum time to cross bridge with flashlight

This question evaluates algorithmic problem-solving and optimization skills, including modeling constrained state transitions, reasoning about trade-o...

Coding & Algorithms
5
0
73 people solved
Jan 14, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a multi-size storage locker system

This question evaluates a candidate's system-design skills, including distributed systems architecture, resource allocation/bin-packing reasoning for ...

System DesignSystem Design FundamentalsLow-Level Design (OOP)
11
0
114 people solved
Jan 2, 2026
Amazon logo
Amazon
Medium
Software Engineer

Implement LRU cache with O(1) ops

Implement LRU cache with O(1) ops Design and implement a fixed-capacity cache supporting get(key) -> value and put(key, value) in O( 1) average time. ...

Coding & Algorithms
12
0
135 people solved
Aug 9, 2025
Meta logo
Meta
Medium
Software Engineer

Design a chat messaging system

Design a chat system similar to WhatsApp/Messenger. Requirements: - 1:1 and group chats. - Send/receive messages in real time when online; store-and-f...

System Design
7
0
56 people solved
Feb 25, 2026
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Clean OCR data and build an LLM dataset

This question evaluates competency in OCR data cleaning and normalization, dataset engineering for LLM fine-tuning, quality filtering, and evaluation ...

Machine LearningData Cleaning & WranglingAnnotation & Label Quality
9
0
128 people solved
Feb 11, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Compute nearest dashmart and busiest assignments

Compute nearest dashmart and busiest assignments You are given an m x n grid of characters where 'D' marks a dashmart, 'X' marks an impassable cell, a...

Coding & AlgorithmsGrids & Matrices
10
0
104 people solved
Jul 17, 2025
Turo logo
Turo
Medium
Software Engineer

Route HTTP requests to pods in a cluster

In a Docker/Kubernetes-like container cluster running multiple replicas (pods) of a service, explain how an incoming HTTP request reaches a specific p...

System Design
11
0
89 people solved
Feb 12, 2026
OpenAI logo
OpenAI
Hard
Data Scientist Locked

Measure free-month promotion impact

This question evaluates causal inference and experimentation skills, including randomized design and estimand framing, metric and ROI attribution, han...

Analytics & ExperimentationExperiment Design (A/B Testing)Business Case Analysis
21
0
186 people solved
Jan 15, 2026
Palo Alto Networks logo
Palo Alto Networks
Hard
Software Engineer

Design an ML inference orchestration platform

System Design: ML Inference Orchestration Platform Context You are designing a multi-tenant platform that exposes several ML models as independent ser...

ML System Design
16
0
136 people solved
Sep 6, 2025
Safeway logo
Safeway
Medium
Product Manager

Supermarket Chain Product Design for an Underserved Niche Shopper Segment

You are a product manager at a large supermarket chain; use Safeway as the concrete example. Your task is to build a product that serves niche markets...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
7 people solved
Aug 12, 2026
Meta logo
Meta
Medium
Machine Learning Engineer

Generate unique permutations with duplicates

Given an array of integers that may contain duplicates, generate all unique permutations. Ensure no duplicate permutations are returned even if some v...

Coding & Algorithms
10
0
76 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist Locked

Compute and interpret quantile loss vs RMSE

This question evaluates competency in probabilistic forecasting evaluation, including understanding of quantile (pinball) loss versus point-error metr...

Statistics & Math
11
0
84 people solved
Oct 13, 2025
Point72 logo
Point72
Hard
Data Scientist

How would you explain PCA and SHAP?

Question You are interviewing for a Data Scientist role at Point72, a systematic / quantitative investment firm. The interviewer asks you to pick one ...

Machine LearningSupervised LearningFeature Engineering
15
0
205 people solved
Oct 24, 2025
First American logo
First American
Medium
Data Scientist

Clarify Ambiguous Requirements and Resolve Team Conflicts

Clarify Ambiguous Requirements and Resolve Team Conflicts Behavioral: Collaboration and Communication (Data Scientist, Onsite) Context You are intervi...

Behavioral & Leadership
11
0
104 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Product Manager

Designing a Marketplace-Safe Experiment for a New Uber Driver Feature

Uber wants to test a new feature built for its drivers. As the product manager, how would you design an A/B test that gives a trustworthy read on the ...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
0
0
12 people solved
Aug 16, 2026
Amazon logo
Amazon
Hard
Data Scientist

Derive and compare core ML and RL methods

ML Fundamentals Technical Screen — Multi‑part Question Context: You are given a set of core machine learning topics to address rigorously. For each pa...

Machine LearningML FundamentalsReinforcement Learning
16
0
123 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Machine Learning Engineer AI Locked

Build Friend Recommendations

This question evaluates proficiency with graph data structures, set operations, uniform random sampling, counting mutual connections, and deterministi...

Coding & Algorithms
9
0
86 people solved
Feb 8, 2026
Google logo
Google
Medium
Software Engineer

Design an elevator control system

Design the software for a multi-elevator control system in a high-rise building. Specify classes, scheduling algorithms for car assignments, handling ...

System DesignLow-Level Design (OOP)Simulation & State Machines
15
1
170 people solved
Sep 6, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Describe the Team Environment in Which You Do Your Best Work

Prompt Describe the team environment in which you do your best work. Go beyond a list of pleasant qualities: explain the concrete behaviors, decision ...

Behavioral & Leadership
3
0
30 people solved
Apr 11, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design an extensible expense rule evaluator

This question evaluates system-design and API/interface skills for rule engines, focusing on data modeling, extensibility, maintainability, and rule/r...

Software Engineering FundamentalsLow-Level Design (OOP)
41
0
499 people solved
Feb 12, 2026
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