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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
Baseten logo
Baseten
Hard
Software Engineer Locked

Parallelize Blocking API Calls with a Thread Pool

Replace sequential blocking API calls with a bounded thread pool while preserving each result's input association and return order. Define worker limi...

Software Engineering FundamentalsConcurrency
35
0
258 people solved
Jul 26, 2026
Reddit logo
Reddit
Medium
Software Engineer Locked

Moderator System with Ranking, Communities, and Demotion

This question tests practical data structure design and object-oriented system modeling, requiring the implementation of a hierarchical moderator mana...

Coding & Algorithms
13
0
160 people solved
Jun 23, 2026
Walmart Labs logo
Walmart LabsAmazonIBM

Also asked at IBM, Microsoft, Google, Salesforce, Morgan Stanley, Meta, Bloomberg, TikTok, Infosys

Medium
Software Engineer

Choose Values without Earning from Adjacent Values

Problem An operation selects one remaining occurrence x, deletes it and earns x points, then deletes all remaining occurrences of x-1 and x+1 without ...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
14 people solved
Discord logo
Discord
Medium
Data ScientistSenior+

Count a Character in a String

Count a Character in a String Implement number_of_character(string, char). - string is the input string. - char is the single character whose occurren...

Coding & AlgorithmsArrays & Strings
4
0
47 people solved
Sep 26, 2026
Adobe logo
Adobe
Hard
Software Engineer

Minimize the Floor Footprint of Supported Boxes

Problem Place n unit cubes in a cubic room whose width, length, and height are all n. Cubes may be placed on the floor. If a cube sits on another cube...

Coding & AlgorithmsMath & Number TheoryGreedy
2
0
17 people solved
Headlands logo
Headlands
Medium
Data Scientist Locked

C++ Sliding-Window Mean of a Float Array With Inf, -Inf and NaN Handling

Compute the mean of every fixed-size sliding window over a C++ float array that may contain inf, -inf and NaN. It tests IEEE-754 semantics for special...

Software Engineering FundamentalsTwo Pointers & Sliding WindowProgramming Languages
6
0
56 people solved
Aug 30, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Design and Evaluate a Retrieval-Augmented Generation Pipeline

Design a RAG pipeline with document chunking, retrieval recall evaluation, grounded answers, permission-aware context, and versioned index updates.

ML System DesignRetrieval-Augmented GenerationLLM Evaluation
9
0
114 people solved
Sep 1, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Process Orders Through a DAG with Completion and Timeout Refunds

Design order DAG execution with prerequisite state, atomic completion-versus-timeout decisions, idempotent refunds, durable recovery, and accurate sta...

System DesignJob Scheduling & WorkflowsDistributed Coordination
7
0
124 people solved
Sep 10, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Mission motivation and a walkthrough of your school, major and job decisions

These are two behavioral conversations from the same interview loop. In a 30-minute panel that opens with a self-introduction, the interviewers care l...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
3
0
32 people solved
Sep 2, 2026
Bloomberg logo
BloombergCapital OneGoogle

Also asked at Google, Amazon, Meta, Revolut

Easy
Software Engineer

List Every Original Root-to-Leaf Value Path

Problem Return every root-to-leaf path in the binary tree as a string with values joined by "->". A leaf has no children. The source permits any outpu...

Coding & AlgorithmsTrees
2
0
19 people solved
Roblox logo
Roblox
Medium
Frontend EngineerSenior+ Locked

Build Six Hold-to-Play Piano Keys with Vanilla Web APIs

Build six accessible hold-to-play piano keys with vanilla HTML, CSS, and JavaScript. Mouse and keyboard presses must compose correctly across simultan...

Software Engineering Fundamentals
16
0
143 people solved
Aug 15, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Design a Prompt Sharing Product

Design a prompt-sharing product with private and public flows, stable versions, permissions, attribution, remixing, revocation, and safe execution. Pr...

System DesignSystem Design Fundamentals
58
0
389 people solved
Jul 8, 2026
Amazon logo
AmazonMetaMicrosoft

Also asked at Microsoft, Google, Bloomberg, Adobe, Anduril, Salesforce, Applied Intuition, Riotgames, Acorns

Medium
Software Engineer

Advance a Binary Life Board Simultaneously In Place

Problem Apply one Game of Life generation to board. Each cell has up to eight surrounding neighbors. A live cell survives with two or three live neigh...

Coding & AlgorithmsSimulation & State Machines
1
0
12 people solved
Google logo
Google
Medium
Software Engineer

Last Task Finish Time with Limited CPUs and a Fixed Task Duration

Tasks are scheduled to start at given times, and every task takes the same execution time. At most max_cpus tasks can run at the same moment, one task...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
3
0
49 people solved
May 26, 2026
Amazon logo
AmazonInfosysGoogle

Also asked at Google, Meta, Microsoft, Bloomberg, Apple, Accenture, Visa, Yandex, Agoda, Salesforce, TikTok, TCS, IBM, JPMorgan Chase, Goldman Sachs, Zoho, NVIDIA, Oracle, Cognizant, Sprinklr

Hard
Software Engineer

Count Inclusive-Band Sums of Nonempty Index Ranges

Problem Return the number of nonempty contiguous ranges whose sum lies between lower and upper inclusive. Count index ranges separately even when thei...

Coding & AlgorithmsSortingArrays & Strings
1
0
13 people solved
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Multi-Tenant Cloud IDE: Isolation, Workspaces, Run/Build, Failure Modes

Design a browser-based cloud IDE where many untrusted users each get a workspace with files, a terminal and the ability to run and build code. Cover m...

System DesignSandboxing & IsolationContainers & Orchestration
11
0
84 people solved
Sep 20, 2026
Mastercard logo
MastercardInMobiIntuit

Also asked at Intuit, Amazon, Salesforce, Google, Bloomberg, NetEase

Hard
Software Engineer

Minimize Overwriting Turns of a Single-Character Printer

Problem A printer turn chooses one contiguous interval and writes the same chosen character throughout it, overwriting any existing characters. Return...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
0
0
13 people solved
Amazon logo
Amazon
Medium
Software EngineerSenior+

Design Sent, Delivered and Read Receipts for a Mobile Messaging App

Design the message-status feature of a large mobile messaging app. When someone sends a message, their screen shows its progress: accepted by the serv...

System DesignReal-Time SystemsDistributed Transactions & Idempotency
1
0
28 people solved
Aug 27, 2026
Meta logo
Meta
Hard
Machine Learning Engineer Locked

Design an LLM-Based Conversational Assistant (Chatbot)

This question evaluates the ability to design an end-to-end LLM-based conversational assistant, covering pretraining, alignment, retrieval, and servin...

ML System DesignLLM ApplicationsFine-Tuning & Alignment Techniques
21
0
204 people solved
Jun 27, 2026
Robinhood logo
Robinhood
Medium
Backend Engineer

Explain a Conflict During Backend Delivery

Describe a conflict you encountered while delivering a project and how you handled it. Explain the competing concerns, your actions, and the outcome. ...

Behavioral & LeadershipConflict & Collaboration
0
0
9 people solved
Sep 29, 2026
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