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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k 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 20 results
Upstart logo
Upstart
Easy
Software Engineer Locked

Scale Ingredient Quantities

Scale ingredient strings by multiplying each leading integer quantity by a serving count while preserving unit, multiword name, and input order. Split...

Coding & Algorithms
5
0
46 people solved
Jul 5, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Design a geography-aware virtual card service

This question evaluates a candidate's ability to design secure, low-latency, geography-aware payment systems, covering distributed systems architectur...

System DesignPayments & Ledgers
72
0
552 people solved
Feb 12, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Hiring-Manager Behavioral Round: Impact, Conflict, Cross-Functional Work, and Influencing Without Authority

This hiring-manager behavioral round evaluates a software engineer's leadership, collaboration, and influence competencies through structured STAR sto...

Behavioral & LeadershipProject Deep DiveLeadership & Influence
59
0
635 people solved
Jun 20, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design RAG Retrieval for Data Assets

This question evaluates skills in designing hybrid retrieval pipelines over enterprise metadata, including competencies in information retrieval, exac...

ML System DesignRetrieval-Augmented GenerationEmbeddings & Vector Search
40
0
407 people solved
May 2, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Refactor a chat message processing function

This question evaluates a candidate's ability to refactor and implement clear, maintainable message-processing logic—covering code organization, comma...

Coding & AlgorithmsCode Quality & MaintainabilityJavaScript & TypeScript
22
0
217 people solved
Jan 2, 2026
Applied Intuition logo
Applied Intuition
Hard
Software Engineer

Implement Nested Transactional Key-Value Store

Implement an in-memory key-value store that processes a batch of commands, one command per line. The store must support nested transactions. Supported...

Coding & Algorithms
8
0
93 people solved
Apr 4, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Design a multi-tenant quota system

Design a Global Multi-Tenant Quota Service (Single Global Quota per User) Context Multiple upstream products (e.g., Drive, Photos) share a single glob...

System DesignRate LimitingDistributed Transactions & Idempotency
52
0
684 people solved
Sep 6, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Explain why you want to join Airbnb

"Why Airbnb?" — Culture / Values Round (Software Engineer) You are in the culture round of an Airbnb Software Engineer loop. The interviewer asks you ...

Behavioral & LeadershipMotivation & Fit
38
0
403 people solved
Sep 6, 2025
NVIDIA logo
NVIDIA
Hard
Software Engineer Locked

Implement short algorithms on logs, grids, and strings

This multi-part Coding & Algorithms question evaluates algorithmic problem-solving skills and mastery of core competencies including temporal window r...

Coding & AlgorithmsArrays & Strings
21
0
218 people solved
Feb 11, 2026
Optiver logo
Optiver
Hard
Software Engineer

Design a topic-based news subscription system

Topic-Based News Subscription Service — Design and Implementation Context Build an in-memory service that manages subscribers and delivers relevant ne...

System DesignSearch & Feed SystemsRate Limiting
83
0
1452 people solved
Sep 6, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Solve array duplicate flags and binary swaps

Problem 1: Flag duplicates on the left and right You are given an integer array nums of length n. For each index i, determine: 1. Left-duplicate: whet...

Coding & AlgorithmsArrays & StringsDynamic Programming
33
1
236 people solved
Dec 17, 2025
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
Optiver logo
Optiver
Hard
Software Engineer Locked

Analyze an Unfair-Coin Bankroll Game

A player starts with a bankroll of 10. Explain the assumptions and derivation clearly, check edge cases, and show how the result changes when those as...

Statistics & MathProbabilityPuzzles & Brainteasers
25
0
202 people solved
May 24, 2026
ByteDance logo
ByteDance
Easy
Software Engineer Locked

Debug and Extend a Priority-Aware Python Thread Pool

Debug and extend a Python thread pool with stable priority scheduling under concurrent submissions. Define safe behavior for worker failures, exceptio...

Software Engineering Fundamentals
4
0
38 people solved
Jul 11, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Distributed Crossword Solver

This question evaluates proficiency in constraint-solving algorithms and distributed system architecture, including data representation, efficient sea...

System DesignSystem Design FundamentalsBacktracking & Recursion
30
0
436 people solved
Apr 7, 2026
Liftoff logo
Liftoff
Medium
Software Engineer

Design and implement core Tetris game logic

Implement the core logic of the Tetris game in a way that can run in a terminal (no graphical UI required). Requirements: - Board/grid: standard size ...

Software Engineering Fundamentals
8
0
76 people solved
Feb 26, 2026
Google logo
Google
Medium
Data EngineerIntern

Count Special Index Pairs

Given an integer array nums of length n, count the number of index pairs (i, j) such that: - 0 <= i < j < n - nums[i] * nums[j] is even - j - i is odd...

Coding & Algorithms
10
0
178 people solved
Jan 26, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Design a violation log analyzer

You are given an append-only list of violation events as tuples (id: string, policy: string, date: ISO-8601 string). Build an in-memory "Violation Log...

Coding & AlgorithmsData Structure DesignBinary Search
68
0
463 people solved
Sep 6, 2025
Robinhood logo
Robinhood
Medium
Software EngineerSenior+ Locked

Design authorization and audit logging systems

This question evaluates competency in designing secure authorization and audit logging systems, including access-control models (RBAC/ABAC/hybrid), po...

System DesignAuthentication & AuthorizationObservability
27
0
245 people solved
Jan 22, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

Implement a thread-safe rate limiter

Design and implement a per-user API rate limiter. Requirements: - Method: boolean allow(String userId, long nowMillis) returns whether the request is ...

Coding & AlgorithmsRate LimitingConcurrency
10
0
114 people solved
Jan 26, 2026
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