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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
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
118
2
1046 people solved
Oct 1, 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
90
3
668 people solved
Oct 2, 2026
Stripe logo
Stripe
Medium
Software Engineer

Parse Parent-Child Task Records and Render Them as a Connector Tree

You receive a list of task records and must rebuild the hierarchy of tasks and subtasks they describe, then print it as a text tree. The specification...

Software Engineering FundamentalsTrees
46
3
688 people solved
Sep 30, 2026
Stripe logo
Stripe
Medium
Software Engineer

Validate CSV Company Records for Missing Fields, Length, Forbidden Words and Overlap

You are given a batch of company records as CSV text: a header row that names the fields, followed by one row per company. Write a validator that chec...

Software Engineering FundamentalsArrays & StringsData Cleaning & Wrangling
145
2
1424 people solved
Sep 22, 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
48
0
460 people solved
Sep 30, 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
40
1
350 people solved
Oct 1, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Spreadsheet engine with setCell/getCell, cell references, and cycle detection

Implement a spreadsheet engine with two operations: - set_cell(cell, content) stores the content of a cell (setCell in camelCase languages). A cell is...

Software Engineering FundamentalsGraphsData Structure Design
39
0
365 people solved
Sep 28, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Lowest Common Manager of a Group of Employees in an Org Chart

A company's org chart is a tree. The CEO is at the top, and every other person reports directly to exactly one manager. A person's team is that person...

Coding & AlgorithmsTrees
37
1
290 people solved
Oct 2, 2026
Stripe logo
Stripe
Medium
Software Engineer

Render a GeoJSON Bike Ride with Markers and Alternating Paths via a Map API

You are given a local file, ride-simple.json, that holds a bicycle ride as GeoJSON, and a static map rendering service called staticmap. The service t...

Software Engineering FundamentalsAPI Integration & HTTP ClientsArrays & Strings
19
1
359 people solved
Sep 24, 2026
Google logo
Google
Hard
Software Engineer

Group prerequisite-linked courses into the earliest possible rounds

There are n courses numbered 0 to n - 1. Each pair [a, b] in prerequisites means course b must be completed before course a can be taken. Courses are ...

Coding & AlgorithmsGraphs
23
1
261 people solved
Sep 29, 2026
Stripe logo
Stripe
Medium
Software Engineer

Evaluate Ordered Accept/Block Transaction Rules with AND, OR and Parentheses

In this round you write Python in a coding environment that has a built-in AI assistant, and you are expected to use it. Implement a transaction risk-...

Software Engineering FundamentalsParsing & Interpreters
18
0
345 people solved
Sep 24, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design a Real-Time Trivia Battle Royale Platform with Live Spectating

Design a real-time trivia battle royale platform. Dozens to a hundred or more players join a room. Questions are released round by round, and at the e...

System DesignReal-Time SystemsFault Tolerance & Failover
11
0
113 people solved
Oct 10, 2026
Stripe logo
Stripe
Medium
Software Engineer

Data Center Health Registry, Haversine Distance and Nearest-Healthy Routing

Build a small in-memory service that sends each client to a nearby data center. The exercise has three parts, each building on the previous one, and i...

Software Engineering FundamentalsMath & Number TheoryGeo & Delivery Systems
32
1
258 people solved
Sep 30, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement a GPU credit ledger with expiring grants and out-of-order operations

You are implementing the credit accounting behind a GPU compute product. An account receives credits through grants, spends them through usage, and as...

Software Engineering FundamentalsData Structure DesignHeaps & Priority Queues
12
0
246 people solved
Sep 28, 2026
Amazon logo
Amazon
Hard
Software Engineer

Minimum Priority Conflicts When Interleaving Two Lowercase Strings

You are given two strings, primary (length m) and secondary (length n), made of lowercase English letters. Merge them into one string of length m + n ...

Coding & AlgorithmsDynamic Programming
11
0
196 people solved
Sep 30, 2026
Amazon logo
Amazon
Medium
Software Engineer

Lexicographically Largest Permutation After Sorting One Fixed-Length Window

A logistics team processes shipments in a fixed order before dispatch. The order is given as shipment_order, a permutation of the integers 1 to n, and...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window
5
0
101 people solved
Oct 8, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Hand-Written Gradients: Prefix-Product Backward Pass and Stable Cross-Entropy

This machine learning coding round asks you to write gradients by hand, the way an automatic differentiation (autograd) engine would, without using an...

Machine LearningML CodingArrays & Strings
47
0
351 people solved
Sep 20, 2026
Amazon logo
Amazon
Medium
Software Engineer

Stack Whose Pop Removes the Most Frequent Value, Ties Broken by Recency

A frequency stack holds integers and supports two operations: - push x: place x on top of the stack. - pop: remove and return the value that occurs mo...

Coding & AlgorithmsData Structure DesignStacks & Queues
13
0
149 people solved
Oct 2, 2026
Rippling logo
Rippling
Medium
Software EngineerSenior+

Delivery Driver Payroll Tracker With Accrued, Settled and Unpaid Wage Totals

Implement an in-memory payment tracker for delivery drivers, who are paid by the hour for the time they spend on deliveries. The class must support th...

Software Engineering FundamentalsData Structure DesignLow-Level Design (OOP)
11
0
85 people solved
Oct 10, 2026
IBM logo
IBM
Medium
Software Engineer

Count Index Triplets Whose Max Minus Min Is at Most d

You are given an integer array arr and a non-negative integer d. A triplet is a choice of three distinct positions i < j < k of arr. Its spread is the...

Coding & AlgorithmsTwo Pointers & Sliding WindowSorting
19
0
171 people solved
Sep 30, 2026
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