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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
DoorDash logo
DoorDash
Medium
Software Engineer

Compute Delivery Pay from an Event Stream and Peak Windows

A delivery worker's day is represented by events containing an order ID, worker ID, timestamp, and status such as accepted, fulfilled, or canceled. Pa...

Software Engineering FundamentalsIntervals & SchedulingAPI Integration & HTTP Clients
4
0
35 people solved
Oct 24, 2026
Visa logo
Visa
Medium
Software EngineerSenior+

Maximize Index-Weighted Array Sum When Each Element Swaps at Most Once

You are given an integer array nums. You may swap elements, choosing any two positions for each swap, but every element may take part in at most one s...

Coding & AlgorithmsDynamic ProgrammingBit Manipulation
16
0
151 people solved
Oct 2, 2026
Instacart logo
Instacart
Medium
Software Engineer

Order Shopping Cart Items for Pickup: Frozen Last, Minimum Walking Distance

Return the items in a customer's shopping cart in the order a shopper should pick them up in the store. Frozen items must come after all other items, ...

Software Engineering FundamentalsGreedySorting
2
0
27 people solved
Oct 30, 2026
Amazon logo
Amazon
Medium
Software Engineer

Leadership Principle Stories: Ownership, Dive Deep, Tight Deadline, Disagree and Commit

Answer four behavioral questions of the kind reported across this company's software engineering interview loops. There is no dedicated behavioral rou...

Behavioral & LeadershipOwnership & ExecutionConflict & Collaboration
15
0
124 people solved
Oct 2, 2026
Applied Intuition logo
Applied Intuition
Hard
Software Engineer

Merge Overlapping Collinear Lane Segments Given as Integer Point Lists

Lane geometry is given as a list of straight lane segments. Each segment is a list of integer points [x, y] that all lie on one straight line, listed ...

Coding & AlgorithmsIntervals & SchedulingMath & Number Theory
8
0
161 people solved
Oct 8, 2026
Nextdoor logo
Nextdoor
Medium
Software EngineerSenior+

Design a Neighborhood Newsfeed: Consistency Trade-offs and Paging a Black-Box Ranker

Design the home newsfeed for a neighborhood social network such as Nextdoor, where members see posts from their local community and scroll through the...

System DesignSearch & Feed SystemsCaching
4
0
31 people solved
Oct 26, 2026
Pinterest logo
Pinterest
Easy
Machine Learning EngineerIntern

Implement a k-Nearest Neighbors Classifier from Scratch

Implement a k-nearest neighbors (KNN) classifier from scratch, without a machine learning library. It was one of two from-scratch ML algorithm impleme...

Machine LearningML CodingSupervised Learning
9
0
61 people solved
Oct 14, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Design a Scalable, Polite Web Crawler

Design a web crawler. Starting from a set of seed URLs, the system downloads each page, extracts the links it contains, adds newly discovered URLs to ...

System DesignSystem Design FundamentalsFault Tolerance & Failover
7
0
90 people solved
Oct 12, 2026
Amazon logo
Amazon
Medium
Software Engineer

Which Recipes Can Be Made When Ingredients Can Themselves Be Recipes

A kitchen has an unlimited stock of some basic supplies and a book of recipes. Each recipe has a unique name and a list of ingredients. An ingredient ...

Coding & AlgorithmsGraphs
31
5
266 people solved
Oct 9, 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
24
0
469 people solved
Sep 28, 2026
Harvey logo
Harvey
Hard
Software Engineer

Build a Small RAG Pipeline in a Notebook with Vectorized NumPy and pandas

Build a small retrieval-augmented generation (RAG) pipeline in a notebook. Given a set of documents and a user's question, the pipeline finds the pass...

Machine LearningRetrieval-Augmented GenerationPandas & Python Data
5
0
55 people solved
Oct 12, 2026
Brex logo
Brex
Medium
Software EngineerSenior+

Design a Scheduler with Prerequisites and Target Execution Plans

Design a task scheduler in three stages: support addTask and getNextTask; add prerequisites and task completion; then return an execution plan for a r...

Software Engineering FundamentalsJob Scheduling & WorkflowsGraphs
2
0
23 people solved
Oct 28, 2026
GitHub logo
GitHub
Medium
Software EngineerSenior+

Design an Event Capture System for GitHub Branch Operations

Design a system that captures events for branch operations on GitHub: whenever a branch is created, deleted, or moved by a push, a force-push or a mer...

System DesignMessaging & Event-DrivenDistributed Transactions & Idempotency
1
0
13 people solved
Nov 10, 2026
Databricks logo
Databricks
Medium
Software Engineer

First-Match CIDR Firewall: Status of an IP Address or a Whole CIDR Block

A firewall is configured with an ordered list of rules. Each rule pairs an IPv4 pattern with an action, for example: `python rules = [("192.168.1.0/24...

Coding & AlgorithmsBit Manipulation
27
0
364 people solved
Sep 11, 2026
Valon logo
Valon
Medium
Software Engineer

Design Idempotent Loan Payments and Investor Distribution

Design a simplified loan-payment system. A borrower makes a payment, and the system distributes that payment to investors. Money movement is performed...

System DesignPayments & LedgersAPI Integration & HTTP Clients
4
0
31 people solved
Oct 25, 2026
Pinterest logo
Pinterest
Easy
Machine Learning EngineerIntern

Length of the Longest Run of One Repeated Character in a String

Given a string, return the length of its longest run: the longest stretch of consecutive positions that all hold the same character. Function Signatur...

Coding & AlgorithmsArrays & Strings
5
0
57 people solved
Oct 14, 2026
Airbnb logo
Airbnb
Medium
Software Engineer

Timestamped Parcel Attribute Store With Compare-and-Set, Prefix Listing and TTL

Implement an in-memory store of parcels. Each parcel is identified by a parcel ID and can hold many attributes with different names, each attribute be...

Software Engineering FundamentalsData Structure Design
12
0
162 people solved
Oct 2, 2026
Tencent logo
Tencent
Medium
Site Reliability Engineer

Walk Through Your Most Memorable Production Incident and the Commands You Ran

The first-round interview for a site reliability engineering role was a deep dive into the candidate's past projects. The central question: describe t...

Behavioral & LeadershipReliability & SREDebugging
1
0
10 people solved
Nov 9, 2026
Waymo logo
Waymo
Medium
Data Scientist

Compare Two Rare-Event Rates with Different Exposure

Compare Two Rare-Event Rates with Different Exposure Two versions were observed over different amounts of mileage, and each produced only a small numb...

Statistics & MathHypothesis TestingProbability
14
0
187 people solved
Sep 28, 2026
OpenAI logo
OpenAI
Hard
Software EngineerSenior+

Implement a GPU credit ledger: grant credits, charge usage, report the balance

Implement a GPU credit system. The report names this coding exercise only as "GPU credit", so agree on the interface and the rules with the interviewe...

Software Engineering FundamentalsData Structure Design
3
0
53 people solved
Oct 12, 2026
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