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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
Harvey logo
Harvey
Hard
Software Engineer

Determine identical files ignoring metadata

Question How would you determine whether two files contain identical bytes while ignoring all filesystem metadata? Propose and justify a hashing-based...

System DesignFile & Media StorageCryptography
96
0
668 people solved
Sep 6, 2025
Harvey logo
Harvey
Hard
Software Engineer

Design a production file storage service

System Design: Production-Grade File Storage Service Problem Design a production-grade file storage service with the following APIs, semantics, and co...

System DesignFile & Media StorageStorage & Sharding
97
0
1051 people solved
Sep 6, 2025
Crowdstrike logo
Crowdstrike
Medium
Backend EngineerSenior+

Implement a Risk-Score Priority DetectionStore With Put and GetNext in C++

Design and implement a data structure, DetectionStore, that stores security detections and hands them out by priority. A Detection has three fields: u...

Software Engineering FundamentalsData Structure DesignHeaps & Priority Queues
0
0
2 people solved
Sep 25, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Distributed Rate-Limiting Service

Design a distributed rate limiter for per-user, per-tenant, route, and global API policies under a tight latency budget. Make accuracy and availabilit...

System DesignRate LimitingConsistency & Availability
9
0
188 people solved
Jul 2, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Implement retry wrapper and interdependent validators

Context You are implementing reusable utilities that are commonly needed in modern web apps: 1) a robust retry wrapper for functions that can fail syn...

Software Engineering FundamentalsJavaScript & TypeScriptFault Tolerance & Failover
21
0
186 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Machine Learning EngineerIntern

Find pairs with the minimum absolute difference

Given an integer array (not necessarily sorted), find the minimum absolute difference between any two distinct elements. Return all pairs of values th...

Coding & AlgorithmsSorting
9
0
166 people solved
Feb 9, 2026
Google logo
Google
Medium
Software Engineer

Solve Quickselect, Tree Distance, and Prefix Substrings

You are given three independent coding tasks. 1. Implement Quickselect - Given an unsorted integer array nums and an integer k, return the k-th sma...

Coding & Algorithms
8
0
96 people solved
Apr 25, 2026
Amazon logo
Amazon
Medium
Frontend EngineerNew Grad Locked

Intervene When Your Team Is Heading in the Wrong Direction

Show how you constructively challenged a risky team direction by validating the concern, proposing an evidence-backed alternative, hearing counterargu...

Behavioral & Leadership
1
0
24 people solved
Aug 22, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Merge Overlapping Closed Intervals

Implement merge_intervals(intervals) for closed intervals. Work through the function contract, boundary cases, correctness argument, and time and spac...

Coding & Algorithms
3
0
24 people solved
Aug 9, 2026
Additive Ai logo
Additive Ai
Medium
Software Engineer

Advance Game of Life with Reduced Auxiliary Storage

Implement game_of_life(board) to advance a rectangular binary grid by one generation. A value of 1 is alive and 0 is dead. A cell's neighbors are the ...

Coding & AlgorithmsSimulation & State Machines
3
0
26 people solved
Aug 24, 2026
Google logo
Google
Hard
Software EngineerSenior+

Convert Valid Snake Case to Lower Camel Case

Convert Valid Snake Case to Lower Camel Case Given a valid snake-case identifier, convert it to lower camel case. The input consists of one or more lo...

Coding & Algorithms
13
2
92 people solved
Apr 16, 2026
Apple logo
Apple
Medium
Machine Learning EngineerNew Grad

Design a multimodal RAG assistant

Prompt Design a Retrieval-Augmented Generation (RAG) system that can answer user questions using an internal knowledge base containing multiple modali...

System DesignRetrieval-Augmented GenerationEmbeddings & Vector Search
23
0
230 people solved
Dec 15, 2025
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Account Balance with Expiring Grants

This question evaluates the ability to design a data structure that tracks time-limited credit grants, prioritizing expiration order during spending a...

Coding & Algorithms
4
0
60 people solved
Jun 23, 2026
Netflix logo
Netflix
Medium
Software Engineer Locked

Design a Scheduler for ML Training and Batch Inference Jobs

Design a scheduler for training, batch inference, and lower-priority evaluation jobs across shared compute resources. Model workload-specific needs, a...

System Design
4
0
62 people solved
Jun 24, 2026
Harvey logo
Harvey
Hard
Software Engineer Locked

Design a RAG Q&A Agent over Law Firm Legal Memos

This question evaluates a candidate's ability to design a retrieval-augmented generation system, covering ingestion, chunking, indexing, retrieval, an...

ML System DesignRetrieval-Augmented GenerationEmbeddings & Vector Search
17
0
283 people solved
Jun 18, 2026
Google logo
Google
Hard
Software Engineer

Apply Range Overwrite Queries

You are given an integer array nums of length n and a list of range-assignment queries. Each query is a tuple (left, right, value), where left and rig...

Coding & AlgorithmsTrees
33
2
338 people solved
Feb 25, 2026
Millennium logo
Millennium
Medium
Software EngineerIntern

How a C++ Mutex Protects Shared State

How does a mutex work in C++, and what must an application do for it to protect shared state correctly? Explain the language-level guarantee, a possib...

Software Engineering FundamentalsConcurrencyProgramming Languages
2
0
31 people solved
Apr 26, 2026
Stripe logo
Stripe
Hard
Software Engineer Locked

Calculate Per-User Usage Charges

This question evaluates algorithmic data aggregation, numeric billing computations, and the ability to model proration and threshold semantics across ...

Coding & AlgorithmsArrays & Strings
16
0
147 people solved
Jan 3, 2026
eBay logo
eBay
Medium
Software Engineer Locked

Investing in Deliberate Professional Growth

Describe a deliberate professional-growth activity through the skill gap, chosen practice, feedback loop, and observable change it produced. The promp...

Behavioral & Leadership
1
0
13 people solved
Aug 19, 2026
Google logo
Google
Medium
Software Engineer

Find Players with Uniquely Determined Rankings

Find Players with Uniquely Determined Rankings Problem There are n players numbered 0 through n - 1. Each result (winner, loser) states that the winne...

Coding & Algorithms
4
2
56 people solved
Apr 19, 2026
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