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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026

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>Build a 30-day plan from PracHub's Meta SWE questions.

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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
Atlassian logo
Atlassian
Medium
Software Engineer

Design Monitoring and Reliability for 99.99% Availability

Explain how you would review a system architecture for monitoring and reliability, with a target availability of 99.99%. Begin by stating the user jou...

System DesignReliability & SREObservability
9
0
114 people solved
Sep 4, 2026
Databricks logo
Databricks
Medium
Software Engineer

Design a Visa-Style Card Payment Processing System

Design a Visa-style card payment system. The report records only the prompt. It can be scoped two ways, and choosing and defending a scope is part of ...

System DesignPayments & LedgersDistributed Transactions & Idempotency
3
0
49 people solved
Sep 11, 2026
Datadog logo
Datadog
Hard
Software EngineerSenior+

Prioritize Critical Findings in a High-Load Batch Processor Review

Prioritize Critical Findings in a High-Load Batch Processor Review A Python application crashes under heavy load. A large pull request replaces a sync...

Software Engineering Fundamentals
10
0
144 people solved
Aug 17, 2026
Cohere logo
Cohere
Medium
Machine Learning Engineer

Design How an LLM Detects Questions Beyond Its Training Cutoff and Says So

When a chat assistant such as ChatGPT-3.5 is asked about something recent, it may reply that its training data only goes up to a certain point (for ex...

ML System DesignLLM Applications
3
0
27 people solved
Sep 22, 2026
Apple logo
Apple
Medium
Software EngineerSenior+

Redesign an Existing Relational Database to Reduce Read Latency

In a staff-level engineering screen, the interviewer describes the database design behind one of the team's real projects and asks how you would chang...

System DesignIndexing & Query PerformanceCaching
2
0
31 people solved
Sep 21, 2026
Salesforce logo
Salesforce
Medium
Software EngineerSenior+

Fewest Add-or-Subtract Power-of-Two Steps to Reduce n to Zero

You are given a positive integer n. In one operation you may add 2i to the current value or subtract 2i from it, for any integer i >= 0 you choose; ea...

Coding & AlgorithmsBit Manipulation
2
0
37 people solved
Sep 22, 2026
Mercor logo
Mercor
Medium
Software Engineer

Stripe Payment Integration: Error Handling, Idempotent Retries and Payment Storage

Your backend service needs to start charging customers through Stripe, a third-party payments API. The interviewer asks you to add a Stripe integratio...

Software Engineering FundamentalsAPI Integration & HTTP ClientsDistributed Transactions & Idempotency
1
0
32 people solved
Sep 17, 2026
Google logo
Google
Easy
Software Engineer Locked

Assign the Minimum Fleet to Rental Reservations

Assign every rental reservation to a numbered vehicle while minimizing fleet size under exact pickup, return, reuse, and tie-breaking rules. Return bo...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
179
4
1881 people solved
Aug 14, 2026
Harvey logo
Harvey
Medium
Frontend Engineer

Design a Chat Application with Durable Conversation History

Design a chat application with persistent conversations and real-time messaging. Explain the client state, APIs, delivery path, and reconnect behavior...

System DesignState ManagementDistributed Transactions & Idempotency
4
0
40 people solved
Sep 15, 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 Design
1
0
15 people solved
Oct 2, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Build a Top-Down Reporting Forest from Employee-Manager Pairs

You are given a list of reporting relationships. Each person is identified by a positive integer ID, and each pair [employee, manager] means that empl...

Coding & AlgorithmsTrees
1
0
16 people solved
Sep 28, 2026
Harvey logo
Harvey
Medium
Machine Learning Engineer

Training LLM Agents for Long-Context, Long-Horizon Tasks: Environments and Rewards

Discuss how you would train a language-model agent to perform well on long-context, long-horizon tasks: tasks in which the model must work over a larg...

Machine LearningReinforcement Learning
2
0
26 people solved
Sep 27, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Build a Running Late-Order Refund Workflow as Separate Python Services

In this round you build a small working system in Python with the help of an AI coding assistant, and then discuss how you would extend it. The workfl...

Software Engineering FundamentalsJob Scheduling & WorkflowsMicroservices & Service Architecture
6
0
44 people solved
Sep 7, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Build an Order-Exception Microservice with Explicit Refund Policies

Design a local microservice that handles reported delivery problems for orders, including partial loss, complete loss, and delay. It should decide whe...

Software Engineering FundamentalsLow-Level Design (OOP)
4
0
56 people solved
Sep 10, 2026
Amazon logo
Amazon
Medium
Software Engineer

Order Dependent Tasks and Identify Work to Rerun

Given tasks and their prerequisite relationships, return any valid execution order and detect circular dependencies. Then identify every task that mus...

Coding & AlgorithmsGraphs
3
1
37 people solved
Sep 14, 2026
Capital One logo
Capital One
Medium
Software Engineer

Design a Credit Card System: Authorization, Fraud, Bureau Reports, Limit Increases

Design the back end of a credit card system for a card issuer. The system must support: 1. Login. Customers sign in to the issuer's website and mobile...

System DesignPayments & Ledgers
1
0
19 people solved
Sep 22, 2026
Vanta logo
Vanta
Medium
Software Engineer

Keep the First Occurrence of Every Globally Unique Line

Implement global line uniqueness: keep only the first occurrence of each distinct input line, even when duplicates are not adjacent. Function Signatur...

Coding & AlgorithmsArrays & Strings
3
0
52 people solved
Sep 12, 2026
DRW logo
DRW
Hard
Software EngineerNew Grad

Maximize a Digit Subsequence with Even Counts of Ones and Twos

Given a string digits containing only 1 and 2, delete zero or more characters so that the remaining count of each digit is even. Preserve the relative...

Coding & AlgorithmsGreedy
11
0
77 people solved
Aug 28, 2026
Nextdoor logo
Nextdoor
Medium
Software EngineerSenior+

Design In-Memory Transactions with Snapshots and Savepoints

Design an in-memory database with transaction and savepoint support. Explain how reads, writes, and deletions interact with a transaction, how a savep...

Software Engineering FundamentalsTransactions & IsolationDatabase Internals
5
0
80 people solved
Sep 9, 2026
Google logo
Google
Medium
Software Engineer

Design an LLM Agent for Manufacturing: Production Status, Work Orders and Quotes

Design an AI agent for a manufacturing business. Users talk to it in natural language, and it must handle three kinds of request: - Production progres...

ML System DesignSystem Design FundamentalsAI Agents
0
0
13 people solved
Oct 2, 2026
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