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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Medium
Software Engineer Locked

Find Earliest Fully Connected Time

This question evaluates a candidate's understanding of dynamic graph connectivity, time-ordered event processing, and state maintenance in graphs, inc...

Coding & AlgorithmsGraphs
37
2
514 people solved
Apr 5, 2026
Meta logo
Meta
Hard
Data Engineer

Write SQL for car rental utilization by city

SQL / Data Query Prompt (Car Rental) You are given four tables: user - user_id location - location_id - city car - car_id - car_size (e.g., compact, m...

Coding & AlgorithmsSQL
14
2
211 people solved
Dec 1, 2025
Airtable logo
Airtable
Hard
Software Engineer

Design JSON serialization for circular references

Design a JSON Serialization/Deserialization Strategy With Cycles and Determinism You are designing a JSON-based serializer/deserializer for a graph of...

System DesignParsing & InterpretersGraphs
36
0
402 people solved
Sep 6, 2025
Coupang logo
Coupang
Medium
Software Engineer

Find shortest distance between two islands

Problem You are given an R x C binary grid where: - 1 represents land - 0 represents water The grid contains exactly two 4-directionally connected isl...

Coding & Algorithms
12
0
84 people solved
Dec 13, 2025
Stripe logo
Stripe
Hard
Data Scientist

Design a model for subscription adoption prediction

Predicting 60-Day Adoption of Subscription by Non-Subscription Merchants Context You need to predict which merchants who are not currently using the S...

Machine Learning
4
0
56 people solved
Oct 13, 2025
Uber logo
Uber
Hard
Software Engineer

Design driver heat map and discuss consensus

Design driver heat map and discuss consensus Real-Time Driver Heat Map with Top-K Busiest Cells, Plus Paxos vs. Raft Context You are designing a real-...

System DesignGeo & Delivery SystemsConsensus & Replication
33
0
286 people solved
Aug 4, 2025
Clickup logo
Clickup
Medium
Software Engineer

Design an AI-Powered Search System, Focusing on the Search Index

Design an AI-powered search system: users search in natural language and should find relevant content even when their words differ from the wording of...

System DesignSearch & Feed SystemsEmbeddings & Vector Search
0
0
6 people solved
Jul 11, 2026
Cerebras logo
Cerebras
Medium
Software Engineer

Implement and Optimize Vector Multiplication

Implement vector–vector multiplication for dense vectors (e.g., dot product). Then, describe how you would optimize the implementation for a parallel ...

Coding & AlgorithmsArrays & StringsConcurrency
22
0
193 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a Perishable-Goods Inventory and Location Tracking System

This system design question evaluates the ability to architect a location-tracking and inventory service for perishable goods across a distributed ret...

System Design
5
0
74 people solved
Jun 13, 2026
Reddit logo
Reddit
Easy
Data Scientist Locked

Design experiment for ads in chat with budgets

This question evaluates a data scientist's skills in experimental design, causal inference, metrics selection, and handling allocation constraints for...

Analytics & Experimentation
12
0
90 people solved
Dec 11, 2025
DoorDash logo
DoorDash
Medium
Software EngineerSenior+

Build Resilient Aggregation and Debug Routing

This onsite combined two software-engineering exercises: 1. Implement a service method that calls multiple mock downstream APIs, merges their response...

Software Engineering FundamentalsAPI Integration & HTTP ClientsPartitioning & Consistent Hashing
28
0
232 people solved
Feb 3, 2026
Discord logo
Discord
Medium
Software Engineer

Design leader election using Redis leases

Design Leader Election Using Redis Leases You have N stateless service instances all running the same code. At any instant, exactly one instance must ...

System DesignDistributed CoordinationFault Tolerance & Failover
55
0
430 people solved
Oct 25, 2025
DoorDash logo
DoorDash
Hard
Analytics Engineer

Walk Through an ETL Project

For an Analytics Engineer interview, walk through an ETL project you built end to end. Describe the business goal, source systems, ingestion pattern, ...

Behavioral & Leadership
10
0
99 people solved
Oct 12, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Decide target via subsequence plus/multiply expression

Question Given a sequence of positive 32-bit integers A and an integer target, determine whether there exists a subsequence of A (preserving order, us...

Coding & AlgorithmsBacktracking & Recursion
19
0
279 people solved
Sep 6, 2025
Netflix logo
Netflix
Hard
Software Engineer

Design ads frequency capping service

Design an Ads Frequency Capping Service Context You are designing a service that ensures a user does not see the same ad creative or campaign more tha...

System DesignAds SystemsRate Limiting
44
0
680 people solved
Jul 17, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Implement node messaging and path discovery

You have a network where each node knows only its parent and its children and can send messages to its parent and children. 1) Implement a sendMessage...

Coding & AlgorithmsFault Tolerance & FailoverDistributed Coordination
53
0
469 people solved
Jul 27, 2025
Remitly logo
Remitly
Hard
Software Engineer

Whiteboard and Deep Dive a Past Project

System Design: End-to-End Architecture Walkthrough Prompt Whiteboard the end-to-end architecture of a complex, user-facing system you led. Cover: 1. M...

System DesignProject Deep DiveSystem Design Fundamentals
12
0
138 people solved
Aug 13, 2025
Reddit logo
Reddit
Hard
Machine Learning Engineer Locked

Design comment ranking

This question evaluates competency in designing large-scale machine learning ranking systems, testing skills such as candidate generation, label and t...

ML System DesignRanking ModelsFeature Engineering
26
0
185 people solved
Mar 2, 2026
Disney logo
Disney
Medium
Software Engineer

Implement BFS shortest path in grid

Implement a function that returns the length of the shortest path in an unweighted 2D grid from the top-left cell (0, 0) to the bottom-right cell (m-1...

Coding & Algorithms
9
0
103 people solved
Sep 6, 2025
Walmart Labs logo
Walmart Labs
Easy
Software EngineerSenior+

Merge two sorted arrays in-place

You are given two integer arrays sorted in non-decreasing order, and two integers m and n: - nums1 has length m + n. The first m elements of nums1 con...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
11
0
105 people solved
Dec 9, 2025
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