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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
Amazon logo
Amazon
Medium
Software Engineer

Design an AI-Agent Security Detection Pipeline for 1 TB/Day of Streaming Telemetry

Design a system in which an AI agent works on a stream of security data and runs security detection on it. The incoming traffic is about 1 TB per day....

System DesignSystem Design FundamentalsBatch & Stream Processing
13
0
183 people solved
Oct 9, 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
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Resolve Variable Assignments With Addition and Subtraction, Flagging Unresolvable Ones

You are given a list of assignment lines. Each line assigns to a variable either an integer or an expression that adds and subtracts integers and othe...

Coding & AlgorithmsGraphsParsing & Interpreters
0
0
18 people solved
Nov 10, 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
DoorDash logo
DoorDash
Medium
Machine Learning Engineer

Design a Food Ordering Chatbot With Dietary Guardrails and Budget Fine-Tuning

In a round focused on post-training and evaluation of large language models, design a customer-facing chatbot that lets customers of a food-delivery a...

ML System DesignLLM ApplicationsFine-Tuning & Alignment Techniques
1
0
14 people solved
Nov 10, 2026
Rippling logo
Rippling
Medium
Software Engineer

Task Manager: Validated addTask and Filtered, Sorted printTasks With Child Tasks

Implement an in-memory task manager in Java with two operations, addTask and printTasks. In the reported version a task is a Java record with the fiel...

Software Engineering FundamentalsLow-Level Design (OOP)Sorting
3
0
25 people solved
Nov 2, 2026
Databricks logo
Databricks
Medium
Software Engineer

Thread-Safe Durable Event Writer Shared by Thousands of Threads

Design a thread-safe, durable event writer used by a single application running on one server. Thousands of application threads share a single instanc...

System DesignConcurrencyOperating Systems
62
1
506 people solved
Sep 11, 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
99
1
787 people solved
Oct 2, 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
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
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
Snowflake logo
Snowflake
Medium
Software Engineer

Fewest Node Deletions to Cap an N-ary Tree's Height at k

A rooted tree has n nodes numbered 0 to n - 1, and each node can have any number of children. Node 0 is the root. Deleting a node attaches its childre...

Coding & AlgorithmsTrees
17
0
153 people solved
Oct 12, 2026
Databricks logo
Databricks
Medium
Software Engineer

Design an Online Bookstore: Catalog, Search, Inventory and Orders

Design a bookstore. The report gives only this short prompt for the architecture round, so settle the scope with the interviewer first. In its usual f...

System DesignSystem Design FundamentalsTransactions & Isolation
6
0
63 people solved
Oct 14, 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
Google logo
GoogleBloombergMeta

Also asked at Meta, Amazon, Microsoft, TikTok, Airbnb, Walmart Labs, Confluent, LinkedIn, Apple, ByteDance, Pinterest, Yahoo, Zoho, Infosys, Mastercard, Deshaw, Salesforce, Pornhub

Medium
Software Engineer

Enumerate Reusable-Value Target Combinations

Problem Given the array choices of distinct integers and the integer goal, return every unique combination of values from choices whose sum is goal. Y...

Coding & AlgorithmsBacktracking & RecursionDynamic Programming
10
0
67 people solved
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
Salesforce logo
Salesforce
Medium
Software EngineerSenior+

Store, Deliver and Rotate an API Server's Database Credentials

The interviewer asks how your team updated the database credentials used by your API server: where the credential is stored, how the running service o...

Software Engineering FundamentalsApplication SecurityAuthentication & Authorization
4
0
35 people solved
Oct 23, 2026
Cursor logo
Cursor
Medium
Software Engineer Locked

Build a Merkle Tree over a Directory with Hash Lookup and Tree Diff

Implement a Merkle tree over a real directory in Python, with N-ary directory nodes, a build method, a hash lookup by path, and a diff that compares t...

Software Engineering FundamentalsTreesTesting & Quality
54
0
415 people solved
Sep 16, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Explain Performance Engineering and How to Build a Trustworthy GPU Benchmark

This round, for a GPU performance engineering team, had no coding: it was a conversation about your understanding of performance engineering and of be...

Software Engineering FundamentalsGPU Programming
3
0
47 people solved
Oct 16, 2026
Ode logo
Ode
Medium
Software Engineer

Test-Drive a Set in Java Without java.util Using Strict Red-Green-Refactor

In a 60-minute collaborative pairing interview you test-drive a set in Java with JUnit, without using anything from java.util. The interviewer shares ...

Software Engineering FundamentalsTesting & QualityData Structure Design
1
0
13 people solved
Nov 5, 2026
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