PracHub
QuestionsExperienceLearningGuidesInterview Prep
Visa Tools

Visa Tools

Visa Sponsors

Find employers with sponsorship filings

H-1B Odds Calculator

Explore your lottery selection odds

Visa Bulletin

Monthly green-card priority dates

PracHub

Master your tech interviews with 18,000+ real questions from top companies.

Product

  • Questions
  • Learning Tracks
  • Interview Guides
  • Resources
  • Green Card Tracker
  • Premium
  • Practice with AI agents
  • For Universities
  • Affiliate Program
  • Careers

Browse

  • By Company
  • By Role
  • By Category
  • Topic Hubs
  • Interview Experiences
  • SQL Questions
  • Blind 75
  • AI Coding Questions
  • Compare Platforms
  • Discord Community

Support

  • support@prachub.com

Legal

  • Privacy Policy
  • Terms of Service
  • About Us

© 2026 PracHub. All rights reserved.

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
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Order Tasks with Dependencies Using a Deterministic Topological Sort

Return the lexicographically smallest valid task order from a directed acyclic dependency graph, including disconnected and prerequisite-free tasks.

Coding & AlgorithmsGraphsHeaps & Priority Queues
63
0
728 people solved
Sep 17, 2026
Databricks logo
Databricks
Medium
Software Engineer

Joining a New Team Overwhelmed by On-Call Fires: What Do You Do?

This question closed a domain deep-dive round. The candidate first presented a few slides on their past work and answered questions about it; the inte...

Behavioral & LeadershipReliability & SREOwnership & Execution
3
0
27 people solved
Oct 14, 2026
Baseten logo
Baseten
Medium
Software Engineer

Design an observability logging system for emitting and querying logs

Design an observability logging system. Services running across a fleet of machines emit log records, and engineers query those records, for example w...

System DesignObservabilityMessaging & Event-Driven
22
0
258 people solved
Aug 4, 2026
Walmart Labs logo
Walmart Labs
Easy
Software Engineer

Palindrome Check That Ignores Spaces, Symbols and Letter Case

Given a string, decide whether it reads the same forwards and backwards once spaces and symbols are ignored. The report says only that spaces and symb...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
0
0
12 people solved
Nov 6, 2026
Figma logo
Figma
Hard
Software EngineerSenior+

Walk Through a Generative-AI Product Project and a Time It Did Not Go to Plan

This is a 30-minute hiring-manager screen for a software engineer role on a team that builds generative-AI product features from zero to one, working ...

Behavioral & LeadershipProject Deep DiveFailure & Learning
1
0
10 people solved
Nov 6, 2026
Citadel Securities logo
Citadel Securities
Medium
Software Engineer

In-Memory Order Book with Price-Time Order, Level Aggregation and Order Cancel

Implement an in-memory order book for a single instrument. Orders arrive one at a time, each with a unique order id, a side (bid or ask), a price and ...

Software Engineering FundamentalsData Structure DesignTrading Systems
17
0
152 people solved
Sep 11, 2026
Lyft logo
Lyft
Medium
Software Engineer

In-Memory Key-Value Store with Nested Begin, Commit, and Rollback Transactions

Implement an in-memory key-value store that supports transactions: - set(key, value) sets key to value. - unset(key) removes key. - get(key) returns t...

Software Engineering FundamentalsData Structure DesignTransactions & Isolation
18
0
138 people solved
Sep 24, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Describe Responsible AI Use and When You Choose Not to Use It

Discuss how you use AI tools in engineering, an example of misuse or an incorrect suggestion, and a situation where you chose not to use AI. Should an...

Behavioral & LeadershipAI-Assisted DevelopmentAmbiguity & Decision Making
1
0
15 people solved
Oct 27, 2026
Harvey logo
Harvey
Medium
Machine Learning Engineer

Training LLM Agents for Long-Context, Long-Horizon Tasks: Environments and Rewards

Discuss how you would train a language-model agent to perform well on long-context, long-horizon tasks: tasks in which the model must work over a larg...

Machine LearningReinforcement LearningAI Agents
12
0
112 people solved
Sep 27, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer

Design and Model a Personalized Feed Recommender

Design a feed recommendation system and explain both its serving architecture and modeling choices. Connect the product objective, candidate generatio...

Machine LearningRecommendation SystemsML System Design
3
1
25 people solved
Oct 17, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Debug a Round-Robin Load Balancer, Then Implement Consistent Hashing

Debug a round-robin load balancer that must keep strict rotation while servers are added and removed, then implement a consistent-hash ring that gives...

Software Engineering FundamentalsPartitioning & Consistent HashingDebugging
25
1
278 people solved
Sep 7, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Referral Credit Tracker with Indirect Referrals

Build a referral credit tracker with account creation, threshold queries, deterministic ordering, and correct credit propagation through indirect refe...

Coding & AlgorithmsData Structure DesignSorting
10
0
215 people solved
Sep 6, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Debug a Transformer Implementation and Implement a KV Cache for Decoding

Practice ML coding question on Transformer language models: find and fix several deliberately planted bugs in a decoder-only Transformer implementatio...

Machine LearningTransformers & AttentionML Coding
34
0
523 people solved
Sep 8, 2026
Apple logo
Apple
Medium
Software EngineerSenior+

Highest-rated food per cuisine under rating updates with a lexicographic tie-break

A rating tracker is created from a list of foods. Each food belongs to one cuisine and has an integer rating. The tracker then processes a sequence of...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
1
0
13 people solved
Oct 25, 2026
Google logo
Google
Hard
Software Engineer

Group prerequisite-linked courses into the earliest possible rounds

There are n courses numbered 0 to n - 1. Each pair [a, b] in prerequisites means course b must be completed before course a can be taken. Courses are ...

Coding & AlgorithmsGraphs
58
2
651 people solved
Sep 29, 2026
Mercor logo
Mercor
Medium
Software Engineer

Code Review: Improve a Java Method That Builds a CSV String

The interviewer shows the following Java method and asks what improvements you would make. There is no coding in this round: explain the problems you ...

Software Engineering FundamentalsCode Quality & MaintainabilityProgramming Languages
14
0
99 people solved
Oct 10, 2026
Amazon logo
Amazon
Medium
Software Engineer

Stack Whose Pop Removes the Most Frequent Value, Ties Broken by Recency

A frequency stack holds integers and supports two operations: - push x: place x on top of the stack. - pop: remove and return the value that occurs mo...

Coding & AlgorithmsData Structure DesignStacks & Queues
32
0
347 people solved
Oct 2, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer

Classify Imbalanced Tabular Data with Missing Values, Then Scale to Billions of Rows

In this ML coding round you are given a tabular dataset for a binary classification task. About 20% of the labels are positive, and some feature value...

Machine LearningML CodingFeature Engineering
3
0
30 people solved
Oct 14, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer

Implement an LRU Cache, Then Add TTL Expiry and Thread Safety

Implement an in-memory cache with a fixed capacity that evicts the least recently used entry when it is full. Then extend it in two steps: entries tha...

Software Engineering FundamentalsData Structure DesignConcurrency
23
0
164 people solved
Sep 24, 2026
Capital One logo
Capital One
Medium
Software EngineerNew Grad

Find the Integer Point Covered by the Most Street Lamps

A street is modeled as a number line. You are given lights, where lights[i] = [position_i, range_i] describes a street lamp at integer coordinate posi...

Coding & AlgorithmsIntervals & Scheduling
41
0
309 people solved
Sep 27, 2026
Previous1...272829...929Next
Popular Categories
SQLBlind 75
Daily Quest

Sign in to earn XP for every problem you solve.

Choose your next challenge

All learning

Blind 75

75 free coding problems to build your foundations, with hints, explanations, and a progress checklist.

Arrays · Graphs · Dynamic programming

Explore Blind 75

ML System Design

Work through the decisions behind machine learning systems, from data to serving.

Data · Models · Evaluation

Explore the course

System Design Interview

Practice reasoning about architecture, scale, and the tradeoffs that shape a system.

Architecture · Scale · Tradeoffs

Explore the course

Explore by company

All companies
  • Meta
  • Google
  • Amazon
  • Apple
  • Microsoft
  • Netflix
  • Capital One
  • TikTok
  • DoorDash
  • Uber
  • Coinbase
  • Airbnb
  • LinkedIn
  • Salesforce
  • Snapchat
  • Spotify
  • PayPal
  • Lyft
  • Pinterest
  • Anthropic
  • OpenAI
  • Databricks
  • Rippling
  • Jane Street

Explore by role

  • Data Scientist
  • Software Engineer
  • Machine Learning Engineer
  • Product Manager
  • Data Engineer
  • Data Analyst
  • Frontend Engineer
  • Backend Engineer
  • Site Reliability Engineer
  • Technical Program Manager

Explore by category

  • Blind 75
  • Coding & Algorithms
  • System Design
  • Machine Learning
  • ML System Design
  • SQL & Python
  • Analytics & Experimentation
  • Behavioral & Leadership
  • Statistics & Math
  • Product / Decision Making
  • Product Design & Strategy
  • SWE Fundamentals

Popular interview guides

  • Meta SWE
  • Meta DS
  • Meta PM
  • Google SWE
  • Google DS
  • Google MLE
  • Amazon SWE
  • Amazon DS
  • Amazon DE
  • Apple SWE
  • Apple MLE
  • Microsoft SWE
  • Microsoft DS
  • TikTok SWE
  • TikTok DS
  • Uber SWE
  • Uber DS
  • DoorDash SWE
  • DoorDash DS
  • Airbnb SWE
  • Airbnb DS
  • LinkedIn SWE
  • LinkedIn DS
  • Netflix SWE
  • Coinbase SWE
  • Capital One DS
  • OpenAI SWE
  • Anthropic SWE

Popular question categories

  • Blind 75
  • Meta Coding
  • Google System Design
  • Amazon Coding
  • Meta Analytics
  • Google ML
  • Amazon System Design
  • Capital One SQL
  • TikTok ML
  • Meta SQL
  • Uber Analytics
  • DoorDash Coding
  • Google Coding
  • Netflix System Design
  • Airbnb Analytics
  • LinkedIn SQL