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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
230
Companies
579
Updated
10.10.2026
230 Questions 579 Companies10.10.2026
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 30 results
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Design a real-time 3D playback system for recorded vehicle logs

Design a system that plays back recorded vehicle log data as an interactive 3D scene. Each recorded drive is a set of logs of time-stamped data stored...

System DesignFile & Media StorageCaching
4
0
35 people solved
Sep 2, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Design a Centralized Logging System

This question evaluates a candidate's ability to design a large-scale, distributed logging system covering ingestion, storage, indexing, and query ser...

System DesignObservabilityMessaging & Event-Driven
47
0
549 people solved
Jun 30, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a Thread-Safe Buffered Writer with a Background Flush Thread

This question assesses a candidate's ability to design a concurrent, thread-safe component that decouples fast in-memory writes from slower disk I/O u...

System DesignConcurrencyData Structure Design
91
0
1059 people solved
Jun 23, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Design a blob storage system for lunar environment

You are asked to design a blob storage system deployed on a lunar base. The interviewer is intentionally making the environment unusual (the Moon) to ...

System DesignFile & Media StorageConsistency & Availability
15
0
200 people solved
Dec 8, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Design an in-memory filesystem and circular queue

Part A — Design an in-memory hierarchical file system. Requirements: - Support operations: ls(path), mkdir(path), createFile(path, content), appendToF...

Coding & AlgorithmsData Structure DesignStacks & Queues
11
0
159 people solved
Aug 11, 2025
Dropbox logo
Dropbox
Medium
Software Engineer Locked

Scale a file-crawling API using async jobs

This question evaluates a candidate's ability to design scalable, fault-tolerant systems for long-running file-crawl operations, including async job o...

System DesignSystem Design FundamentalsAPI Design
16
1
150 people solved
Jan 22, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design Model Weight Distribution

Design a system that distributes large machine learning model weight files to a fleet of GPU inference workers. A new model version is published as on...

ML System DesignSystem Design FundamentalsFile & Media Storage
72
0
536 people solved
Apr 19, 2026
Google logo
Google
Hard
Software Engineer

Design distributed message queue service

Design a Distributed Message Queue Service Problem Statement Design a distributed message queue system that supports very high throughput for both pro...

System DesignMessaging & Event-DrivenConsensus & Replication
43
0
332 people solved
Sep 6, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design VPC, IP plan, management, storage, SSO

Design VPC, IP plan, management, storage, SSO System Design: Multi‑Layer VPC, IP Planning for 2,000 Servers, Fleet Management, Shared Storage, and SSO...

System Design
10
0
74 people solved
Aug 10, 2025
Google logo
Google
Medium
Software Engineer AI

Implement Checksums and Feature Rollout Evaluation

Complete the following two coding tasks in a 90-minute online assessment. An AI coding assistant may be available, but the submitted code must pass th...

Coding & AlgorithmsGraphsDebugging
23
0
186 people solved
Apr 30, 2026
Shopify logo
Shopify
Hard
Software Engineer

Design a rare-book lending and returns system

Design a rare-book lending and returns system System Design: Rare Books Circulation Across Multiple Branches Context Design a system to manage borrowi...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
134
0
963 people solved
Jul 16, 2025
xAI logo
xAI
Medium
Data Engineer

Single-Pass Python Cleaning Pipeline for Million-Document Web Crawl Parquet Files

You have 48 hours for a take-home assignment: build a data cleaning pipeline. The input is a set of Parquet files that hold on the order of a million ...

Data Manipulation (SQL/Python)Data Cleaning & WranglingETL & Data Pipelines
3
0
28 people solved
Sep 5, 2026
Meta logo
Meta
Medium
Software Engineer

Debug and optimize React performance issues

Debug and optimize React performance issues React Debugging and Performance Assessment Background You're reviewing a React single-page application dur...

System Design
6
0
69 people solved
Aug 4, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Analyze matrix multiplication complexity

In an ML coding interview, you're handed a PyTorch file and asked a series of complexity questions about the operations in it. One of them: Given two ...

Software Engineering Fundamentals
91
0
631 people solved
Feb 11, 2026
Harvey logo
Harvey
Medium
AI Agent Locked

Build and Evaluate a Minimal Embedding-Based RAG Pipeline

Build a minimal retrieval-augmented generation pipeline with transparent ingestion, chunking, embeddings, indexing, retrieval, and prompt assembly. Ev...

ML System Design
6
1
74 people solved
Aug 14, 2026
Shopify logo
Shopify
Medium
Data ScientistSenior+ AI Locked

Compute Theme Similarity

This question evaluates understanding of set-based similarity metrics (the Jaccard coefficient) and practical coding skills for transforming and compa...

Coding & Algorithms
12
0
115 people solved
May 23, 2026
Asana logo
Asana
Medium
Software Engineer

Implement ASCII canvas and solve two data problems

Solve the following coding tasks. 1) ASCII Canvas / Printer Implement a small drawing engine for a fixed-size canvas of width = 10 and height = 6. - E...

Coding & AlgorithmsLow-Level Design (OOP)Arrays & Strings
11
1
130 people solved
Feb 8, 2026
Scribd logo
Scribd
Medium
Software Engineer

Product Event Tracking and Analytics Pipeline With Flexible Schema and Retention

Design an event tracking and analytics system for product features. Features in a web application emit JSON events. Every event has a source field (wh...

System DesignSystem Design FundamentalsData Ingestion & CDC
0
0
9 people solved
Sep 4, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design a cloud storage service

Design a cloud storage service System Design: Cloud Document Storage and Sharing Service Context Design the backend for a large-scale cloud document s...

System Design
12
0
82 people solved
Aug 7, 2025
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design Safe Distribution and Activation of Model Weights

Design a release system that distributes large model-weight artifacts to a serving fleet and activates them without exposing partial state. Candidates...

ML System Design
9
0
73 people solved
May 9, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design LLM search handling long token inputs

Design an LLM-powered search and question-answering system over a large corpus of documents such as internal wikis, PDFs, logs, contracts, and web pag...

ML System DesignRetrieval-Augmented GenerationLLM Applications
24
0
239 people solved
Apr 6, 2025
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Mine Novel Images from Unlabeled Data

Design a machine learning system that mines novel or interesting images from a massive, unlabeled image corpus. The corpus is far too large for exhaus...

ML System DesignUnsupervised LearningAnnotation & Label Quality
30
0
448 people solved
Apr 3, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design CI/CD Build Caching

This question evaluates design skills around CI/CD build caching, including distinguishing cache types (dependency caches, compiler outputs, container...

System DesignCachingCI/CD & Deployment
24
0
372 people solved
May 26, 2026
Attentive logo
Attentive
Medium
Software EngineerSenior+

Design a Simple Message Queue Service Without an Off-the-Shelf Broker

Design a simple message queue service using simpler primitives. You may not build it on an off-the-shelf queue or log such as Kafka: the point is to e...

System DesignMessaging & Event-DrivenFault Tolerance & Failover
1
0
14 people solved
Sep 24, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design an SSH-Based Cloud Development Environment

Design an SSH-accessed cloud development platform with persistent workspaces and scheduled build, test, and run tasks. Work through identity, host pla...

System Design
9
0
69 people solved
Jun 25, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Debug transformer and train classifier

Debug and Fix a Transformer Text Classifier, Then Train and Evaluate It You inherit a small codebase for a transformer-based text classifier. It ships...

Machine LearningML CodingModel Evaluation
198
0
2319 people solved
Aug 4, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Design webhook, POI, chat, CI/CD, payments

You are asked to design several large-scale backend systems in a single onsite session. The bar is breadth and judgment under time pressure: for each ...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
25
0
398 people solved
Jul 4, 2025
Databricks logo
Databricks
Medium
Software Engineer

Design Retrieval for a Coding Agent: What to Index, Handling Noise, and Metrics

Design the retrieval system behind a coding agent: an LLM-based assistant that works inside a software code base, reading code, answering questions ab...

ML System DesignRetrieval-Augmented GenerationEmbeddings & Vector Search
3
0
28 people solved
Sep 10, 2026
Google logo
Google
Medium
Software Engineer Locked

Design a Security Monitoring Framework

This question evaluates a candidate's understanding of designing security monitoring frameworks for cloud infrastructure, covering competencies in sys...

System DesignSystem Design FundamentalsOperating Systems
147
0
1103 people solved
May 26, 2026
Databricks logo
Databricks
Medium
Software Engineer

Design a generic key-value store

Design a Generic, Type-Safe Key-Value Store API Context You're asked to design a reusable key-value store with a generic, user-friendly API. The store...

System DesignKey-Value StoresConcurrency
46
0
482 people solved
Sep 6, 2025
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