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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
Google logo
Google
Hard
Software Engineer

Weighted Tree: Total Distance from Each Node to All Other Nodes

An undirected tree has n nodes labeled 0 to n - 1, and every edge has a positive integer weight. The distance between two nodes is the sum of the edge...

Coding & AlgorithmsTreesDynamic Programming
72
1
1003 people solved
Oct 29, 2026
Waymo logo
Waymo
Easy
Software Engineer

Minimum Run Time for Reorderable Tasks with a Per-Type Cooldown

A single worker must run a set of tasks, each labeled by its type, an uppercase letter, given as a string such as "ABBCC". Two tasks of the same type ...

Coding & AlgorithmsGreedy
69
1
528 people solved
Oct 30, 2026
Palantir logo
Palantir
Hard
Software Engineer

Learn an Unfamiliar SQL-Like Query Class, Then Solve Tasks with Its Map and Fold Actions

This round tests how quickly you can learn code you have never seen. You are handed a short class that implements a small SQL-like query language. Fir...

Software Engineering FundamentalsProgramming Languages
59
1
473 people solved
Oct 30, 2026
Google logo
Google
Medium
Software EngineerIntern

Longest Substring That Occurs at Least Twice, Overlaps Allowed

Given a string s, find the longest substring that occurs in s at least twice. The occurrences may overlap. Return that substring, or the empty string ...

Coding & AlgorithmsString AlgorithmsBinary Search
25
0
455 people solved
Oct 25, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement a fault-tolerant work queue that never loses tasks when workers fail

Implement a fault-tolerant work queue. Producers submit tasks to the queue, and workers take tasks from it and process them. A worker can crash, hang,...

Software Engineering FundamentalsData Structure DesignConcurrency
556
6
4842 people solved
Oct 1, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Design a Batched LLM Inference Service Assuming Each Batch Takes 100 ms

Design a service that serves inference requests for a large language model. Each client sends one request containing a prompt and waits for the model'...

System DesignSystem Design FundamentalsLLM Inference & Serving
242
1
2100 people solved
Oct 1, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Two-Player Three-Card Poker Simulation: Deal Hands and Decide the Winner

Write a small poker simulation for exactly two players. Deal each player three cards from a shuffled standard 52-card deck, work out which kind of han...

Software Engineering FundamentalsSimulation & State Machines
36
0
332 people solved
Oct 25, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Same-Hostname Web Crawler: Single-Threaded, Then Multithreaded

Implement a web crawler. You are given a start URL and an HTML parser that fetches a page and returns the links on it. Starting from the start URL, fi...

Software Engineering FundamentalsConcurrencyGraphs
23
1
263 people solved
Oct 26, 2026
Rippling logo
Rippling
Medium
Software EngineerSenior+

Design a Topic-Based News Aggregator with Fast Removal

Design a news aggregator that periodically pulls articles from the APIs of tens of thousands of publishers. A supplied black-box classifier assigns on...

System DesignSearch & Feed SystemsAPI Design
17
0
157 people solved
Nov 3, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Meta, Infosys, Visa, Apple, Bloomberg, JPMorgan Chase, Deloitte, TCS, Spotify, Yandex, Goldman Sachs, Cognizant, IBM, Oracle, Morgan Stanley, Zoho, Tesla, TikTok, Walmart Labs, NVIDIA, Turing, EPAM Systems, Netflix, Cisco, Salesforce, ServiceNow, Accenture

Medium
Software Engineer

Measure the Longest Segment of Distinct Characters

Problem Given the string text, return the greatest length of a contiguous substring whose characters are all different. Return a length, not the subst...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
73
8
532 people solved
Airbnb logo
Airbnb
Hard
Software Engineer

Design a Banking Ledger with Accepted Transfers and Account Merges

Design a banking simulation in four stages: account creation, deposits and payments; activity ranking; transfers that reserve funds until accepted or ...

Software Engineering FundamentalsSimulation & State MachinesLow-Level Design (OOP)
13
0
163 people solved
Nov 5, 2026
Stripe logo
Stripe
Hard
Software EngineerNew Grad

Split-Tender Payment Events with Gift Card Expiry, ZIP Surcharges and Refunds

A retail customer often pays for one purchase with several payment methods, for example covering a 100-dollar purchase with a 40-dollar gift card plus...

Coding & AlgorithmsSimulation & State Machines
123
0
1367 people solved
Oct 10, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Ticket Reservation Class with 10-Minute Holds, a Four-Ticket User Cap and Expiry Options

Implement a ticket reservation component for one event with three operations: hold(), buy() and available(). A hold reserves tickets for a user for 10...

Software Engineering FundamentalsLow-Level Design (OOP)Concurrency
9
0
63 people solved
Nov 11, 2026
Amazon logo
Amazon
Hard
Software Engineer

Fix a Buggy Spring Boot Movie Search Against Five Search Rules

You are given an existing Spring Boot backend that powers a movie search feature, and the search returns wrong results. The search logic is complicate...

Software Engineering FundamentalsDebuggingTesting & Quality
203
5
1907 people solved
Sep 30, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Majority-Vote Labels from Three Noisy Annotators, Then Beat the Baseline

You are given a binary classification dataset in which every example was labeled by three annotators, each giving a binary label (0 or 1). The annotat...

Machine LearningAnnotation & Label QualityML Coding
13
0
212 people solved
Oct 25, 2026
Google logo
Google
Medium
Software Engineer

Count Islands in a Grid and Track the Count as Land Cells Are Added

A map is a grid with m rows and n columns in which every cell is land (1) or water (0). An island is a maximal group of land cells connected horizonta...

Coding & AlgorithmsGraphsGrids & Matrices
403
5
2931 people solved
Oct 2, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Meta, TCS, Bloomberg, IBM, Adobe, Goldman Sachs, Yandex, Cognizant, Infosys, Tinkoff, Visa, Cisco, Oracle, TikTok, Deloitte, Apple, Salesforce, Walmart Labs, EPAM Systems, Zoho, Uber

Medium
Software Engineer

Return a Longest Palindromic Slice

Problem Given the string text, return a contiguous substring of maximum length whose characters read identically from left to right and from right to ...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
27
3
300 people solved
Bloomberg logo
Bloomberg
Medium
Software Engineer

Debug a Seeded-Bug Python Ticket Booking System With an AI Assistant

In a technical screen, the usual algorithm question is replaced by an AI-assisted debugging exercise. You receive a small Python codebase, a little ov...

Software Engineering FundamentalsDebuggingAI-Assisted Development
9
0
69 people solved
Nov 11, 2026
Palantir logo
Palantir
Medium
Software EngineerIntern

Daily Totals of Several Stocks' Prices with Missing Days Carried Forward

Several companies report stock prices, each only on some days. For every date that appears anywhere in the input, compute the total of all companies' ...

Coding & AlgorithmsArrays & StringsSorting
25
0
176 people solved
Oct 29, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Design a PC Game Store, Entitlements, and Large-File Launcher Distribution

Design the backend for a PC game store and desktop launcher. Cover browsing and purchases, ownership entitlements, delivery of game builds and updates...

System DesignSystem Design FundamentalsFile & Media Storage
9
0
127 people solved
Oct 31, 2026
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