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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
Confluent logo
Confluent
Medium
Software Engineer

Design an RSS News Feed Service

Design an RSS news feed service. The service lets users subscribe to RSS sources, ingests articles from those sources on a schedule, stores article me...

System DesignSearch & Feed SystemsAPI Design
38
0
513 people solved
Apr 29, 2026
Applied Intuition logo
Applied Intuition
Medium
Machine Learning Engineer

Design Ordered CUDA Reduction

In CUDA, a parallel reduction can produce different results if the combination order is not fixed, especially for floating-point arithmetic where addi...

Software Engineering FundamentalsGPU Programming
12
0
108 people solved
Apr 14, 2026
Engelhart logo
Engelhart
Medium
Software Engineer

Python Virtual Environments, Conda and Poetry, and Everyday Linux Commands

Explain what Python virtual environments are and why you need them, where tools such as Conda and Poetry fit in, and how you work on Linux day to day....

Software Engineering FundamentalsProgramming Languages
0
0
7 people solved
Sep 19, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Geico, LinkedIn, Bloomberg

Medium
Software Engineer

Maximum Four-Person Families in a Cinema

Problem The cinema has n rows and 10 numbered seats per row. A four-person family may occupy exactly one of these blocks within a row: seats 2..5,4..7...

Coding & AlgorithmsArrays & Strings
1
0
13 people solved
Stripe logo
Stripe
Medium
Software Engineer Locked

Validate transactions with risk rules and reporting

This question evaluates skills in CSV parsing and input validation, numerical and timestamp parsing, rule-based fraud detection and behavioral feature...

Coding & AlgorithmsParsing & InterpretersData Quality & Validation
33
1
403 people solved
Jan 17, 2026
Anduril logo
Anduril
Medium
Frontend Engineer Locked

Diagnose a Memory Leak in a JavaScript Web Application

Diagnose a repeatable memory leak in a long-running JavaScript web application using browser developer tools. Learn to compare heap snapshots, inspect...

Software Engineering Fundamentals
6
0
67 people solved
Aug 2, 2026
Apple logo
Apple
Medium
Product Manager

Apple Wallet Product Improvement: Choosing a Segment and Prioritizing New Features

You are a product manager on Apple Wallet, the app on iPhone and Apple Watch that stores payment cards, tickets, passes and other credentials. How wou...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
13 people solved
Aug 6, 2026
OpenAI logo
OpenAI
Medium
Product Manager

Hardware Product Sense: A Dedicated Device That Brings OpenAI Models Into Hotels

As a product manager at OpenAI, propose a device that brings OpenAI's models into shared public places, a hotel for example. What would you build, and...

Product Design & StrategyProduct SenseAI Product Management
1
0
12 people solved
Aug 19, 2026
Amazon logo
AmazonGoogleMetaHashedIn

Also asked at Meta, HashedIn

Hard
Software Engineer

Fewest Adjacent-or-Equal-Value Jumps to the Last Index

Problem Start at index 0. In one step, move to an in-bounds neighboring index or to any different index holding the same value. Return the minimum ste...

Coding & AlgorithmsGraphs
0
0
11 people solved
Snowflake logo
Snowflake
Medium
Software Engineer

Design a Photo Album Backend: Upload Consistency, Deduplication and Scaling

Design the backend for a photo album service in the spirit of Google Photos: users upload photos, organize them into albums, and browse their albums a...

System DesignFile & Media StorageDistributed Transactions & Idempotency
4
0
31 people solved
May 28, 2026
Capital One logo
Capital One
Easy
Data ScientistSenior+ Locked

Review Preprocessing Code and Tests

This question evaluates a candidate's competency in data-science engineering tasks including code review, data preprocessing techniques (outlier handl...

Coding & AlgorithmsFeature EngineeringTesting & Quality
13
0
150 people solved
Feb 28, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design Real-Time Electricity Monitoring and Policy Control

Design a real-time electricity monitoring platform that converts device telemetry into safe, auditable usage-policy commands. The answer covers event-...

System Design
27
0
202 people solved
Aug 18, 2026
Nuro logo
Nuro
Medium
Software Engineer Locked

Maximize Revenue With Two Contiguous Delivery Routes

Maximize delivery revenue from two nonoverlapping contiguous routes whose lengths are bounded by separate robot capacities. Cover either left-to-right...

Coding & Algorithms
9
0
103 people solved
Jul 24, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Propagate runtime ID across API requests

This question evaluates proficiency in runtime ID propagation across HTTP requests, JSON parsing and serialization, nested data traversal, and type-pr...

Coding & AlgorithmsAPI Integration & HTTP ClientsParsing & Interpreters
29
0
276 people solved
Jan 22, 2026
Anduril logo
Anduril
Medium
Software Engineer Locked

Explain Hash Map Collisions and Operation Complexity

Explain how hash maps use hashing, buckets, and equality checks to store and retrieve key-value pairs. Compare separate chaining with open addressing,...

Software Engineering Fundamentals
13
0
128 people solved
Aug 2, 2026
DoorDash logo
DoorDash
Medium
Product Manager

Raising Reorder Frequency Among Existing DoorDash Customers

You are a product manager at DoorDash, the on-demand delivery marketplace that connects customers with restaurants and other local merchants, and with...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
0
0
11 people solved
Sep 16, 2026
Alibaba logo
Alibaba
Medium
Software Engineer

Fixed-Capacity Cache That Evicts the Least Frequently Used Key, Ties by Recency

Implement a key-value cache with a fixed capacity that, when it is full and a new key has to be inserted, evicts the key that has been used the fewest...

Coding & AlgorithmsData Structure DesignLinked Lists
1
0
16 people solved
Oct 7, 2026
Stripe logo
Stripe
Medium
Software Engineer

Answer hiring manager behavioral questions

Hiring manager round: behavioral questions Prepare structured answers to the following questions (with likely follow-ups). Use concrete examples from ...

Behavioral & LeadershipMotivation & FitProject Deep Dive
45
0
324 people solved
Jan 22, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Design a REST API Abstraction Layer

Design a REST API Abstraction Layer (Internal Service-Client SDK) A company runs many application servers that call internal REST services. Today, eve...

System DesignAPI DesignAPI Integration & HTTP Clients
43
0
352 people solved
Apr 5, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Learn What You Need to Solve an Unfamiliar Problem

Explain learning through an unfamiliar engineering challenge, with a defined knowledge gap, targeted resources, practical validation, expert feedback,...

Behavioral & Leadership
2
0
37 people solved
Sep 14, 2026
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