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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k Questions 570 Companies10.05.2026
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
Nuro logo
Nuro
Hard
Software Engineer

Compare Locks and MVCC in a Versioned Store

A key–value store keeps multiple versions and supports versioned reads, writes, and deletion while preserving earlier history. During a discussion of ...

Software Engineering FundamentalsTransactions & IsolationConcurrency
2
0
32 people solved
Aug 31, 2026
Scale AI logo
Scale AI
Easy
Software Engineer AI

Design a Streaming Job Scheduler

Design and incrementally build a streaming job scheduler: a service (and supporting class) that continuously ingests tasks and dispatches them to work...

System DesignJob Scheduling & WorkflowsGraphs
255
1
2233 people solved
Apr 9, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Simulate Plant Infection With Controlled Burning

You are given an R by C grid of plants. Each plant is initially healthy, infected, recovered, or dead. A plant has up to four orthogonal neighbors. De...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
37
0
252 people solved
Apr 2, 2026
Uber logo
Uber
Medium
Software EngineerSenior+ Locked

Find a Lexicographically Optimal Robot Path with Charging Cells

Find a deterministic robot path through a blocked grid with automatic charging cells. The objective first minimizes charging-cell use, then required b...

Coding & Algorithms
3
0
63 people solved
Aug 17, 2026
Databricks logo
Databricks
Hard
Software EngineerSenior+ Locked

Design a Write-Ahead Log Writer with Batch Writes

Design a concurrent write-ahead-log writer that assigns ordered positions, groups records into bounded batches, and states exactly when durability is ...

Software Engineering FundamentalsDatabase InternalsConcurrency
23
0
172 people solved
May 10, 2026
Google logo
Google
Easy
Software Engineer Locked

Check an Interval Against Existing Intervals for Conflicts

Check whether one half-open candidate interval conflicts with any interval in a large unsorted collection. Respect strict start and end semantics so r...

Coding & AlgorithmsIntervals & Scheduling
18
0
263 people solved
Aug 8, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Choose a Parameter to Reduce Underfitting in Gradient-Boosted Trees

Choose a Parameter to Reduce Underfitting in Gradient-Boosted Trees A gradient-boosted tree model is underfitting. Which parameter could you decrease ...

Machine LearningSupervised LearningML Fundamentals
1
0
12 people solved
Sep 15, 2026
xAI logo
xAI
Medium
Software Engineer

Three Exceptional Achievements, a Recent-Projects Pitch, and a Project Deep Dive

This hiring process leans heavily on how candidates describe their own work. Before any technical interview, candidates submit their three most except...

Behavioral & LeadershipProject Deep DiveCommunication & Stakeholders
1
0
18 people solved
Sep 5, 2026
Shopify logo
Shopify
Easy
Software Engineer Locked

Design a Robot Operations CLI

Design a testable robot-control CLI with typed commands, obstacle semantics, batch reporting, helpful errors, and clean state transitions.

Software Engineering Fundamentals
8
0
60 people solved
Aug 17, 2026
Amazon logo
Amazon
Hard
Software Engineer

Minimize Branch Merge Conflicts

You are given several feature branches that must all be merged into the main branch. Each branch contains a sequence of commits, and each commit modif...

Coding & AlgorithmsDynamic Programming
45
0
694 people solved
Jan 12, 2026
Google logo
Google
Hard
Data Analyst

Investigate a Decrease in Webpage Warnings

Investigate a Decrease in Webpage Warnings A system that warns users about malicious webpages shows a decrease in the number of warnings displayed. Ho...

Analytics & ExperimentationMetric DiagnosticsData Quality & Validation
0
0
14 people solved
Sep 9, 2026
Onepay logo
Onepay
Medium
Software Engineer

Evolve a Polling Chat API for Production

Evolve a basic chat API into a system suitable for high concurrency, real-time communication, and durable message storage. The starting interface is: ...

System DesignReal-Time SystemsAPI Design
2
0
19 people solved
Sep 9, 2026
NVIDIA logo
NVIDIA
Medium
Applied ScientistIntern

How AI Agents Fit Into Your Research Workflow: Ideas, Experiments, and Paper Writing

In a research internship interview, you are asked how AI agents have changed your research. Describe your current day-to-day research workflow across ...

Behavioral & LeadershipEthics & ResponsibilityAI Agents
0
0
11 people solved
Sep 17, 2026
Scale AI logo
Scale AI
Easy
Backend Engineer Locked

Design a Durable Task Scheduling Service

Design a durable distributed scheduler for one-time and recurring tasks while keeping scheduling separate from execution. Define lifecycle and time se...

System DesignJob Scheduling & WorkflowsDistributed Coordination
29
1
237 people solved
Jul 27, 2026
Point72 logo
Point72
Medium
Quantitative ResearcherIntern

Prove That Lasso Can Be Written as a Quadratic Program

Prove That Lasso Can Be Written as a Quadratic Program For a real matrix $X\in\mathbb{R}^{n\times p}$, response $y\in\mathbb{R}^n$, and $\lambda>0$, c...

Statistics & MathRegression & Statistical ModelingML Fundamentals
1
0
16 people solved
Sep 7, 2026
DoorDash logo
DoorDash
Medium
Software EngineerSenior+ AI Locked

Implement Timeout Refund Workflow

This question evaluates skills in deterministic workflow design, idempotency and retry-safety for external payment integrations, state-transition corr...

Coding & AlgorithmsLow-Level Design (OOP)Simulation & State Machines
14
1
213 people solved
Jun 5, 2026
Bnsf logo
Bnsf
Hard
Software Engineer

Unify Notification Services Without Duplicate Delivery

Unify Notification Services Without Duplicate Messages Two existing notification systems each own a different notification type and integrate with onl...

System Design
4
0
34 people solved
Aug 19, 2026
Palantir logo
Palantir
Easy
Software Engineer

Design a Server Metrics Monitor

Design a server metrics monitoring system that periodically pulls metrics from a fleet of servers and makes them available for dashboards and alerting...

System DesignObservabilityConcurrency
32
0
555 people solved
Mar 8, 2026
Netflix logo
Netflix
Easy
Software Engineer Locked

Implement a Key-Value Cache with Per-Entry Expiration

Design a byte-limited key-value cache with independent expiration per entry and oldest-live-entry eviction. Define replacement age, exact expiry behav...

Software Engineering Fundamentals
7
0
77 people solved
Aug 21, 2026
Datadog logo
Datadog
Medium
Software Engineer Locked

Design an LLM Agent System That Automatically Resolves Jira Tickets and Opens Pull Requests

This ML system design question evaluates the ability to architect an autonomous LLM-agent pipeline spanning retrieval-augmented generation, tool integ...

ML System DesignAI AgentsRetrieval-Augmented Generation
58
0
387 people solved
Jun 4, 2026
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