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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
C3 AI logo
C3 AI
Easy
Software Engineer

Design a restaurant reservation system

Problem Design a restaurant reservation system similar to common booking products. The system should allow customers to search availability and book t...

System DesignSystem Design FundamentalsTransactions & Isolation
26
0
315 people solved
Nov 7, 2025
eBay logo
eBay
Medium
Software EngineerSenior+

Assign Ads to Browser Positions

Implement a function that assigns ads to browser positions for a single user. You are given: - positions: a list of browser position identifiers, such...

Coding & Algorithms
2
0
46 people solved
Apr 13, 2026
Two Sigma logo
Two Sigma
Hard
Data Scientist

How Would You Test Whether Momentum Is a Real Alpha Signal in Stocks?

In a quantitative-research data-analysis round, you are asked a methodology question. No coding is required — the interviewer wants you to reason like...

Machine Learning
7
0
94 people solved
Oct 28, 2025
Cohere logo
Cohere
Medium
Software Engineer

Design an Enterprise Research Assistant with Verifiable Citations

Design an Enterprise Research Assistant with Verifiable Citations Design an enterprise research system that accepts complex questions, retrieves autho...

ML System Design
15
0
122 people solved
Apr 9, 2026
Jane Street logo
Jane Street
Easy
Software Engineer

Calculate dice game win probability

Calculate dice game win probability Dice Game With Tie Rerolls: Probability You Eventually Win Context - Three players each roll a fair standard 6-sid...

Statistics & MathProbabilityPuzzles & Brainteasers
42
1
571 people solved
Aug 4, 2025
Google logo
Google
Medium
Product Manager

Handling Unclear Communication

Behavioral Prompt: Handling Unclear Communication in Remote Meetings You are in a remote or hybrid meeting, such as a phone screen or cross-functional...

Behavioral & LeadershipCommunication & Stakeholders
117
0
937 people solved
Jul 4, 2025
Figma logo
Figma
Hard
Software Engineer

Design a trending-articles platform

Design a Near Real-Time Trending-Articles Platform Design the backend that surfaces trending articles in near real time for a large-scale consumer pro...

System DesignSearch & Feed SystemsBatch & Stream Processing
39
0
468 people solved
Sep 6, 2025
Waymo logo
Waymo
Medium
Software Engineer Locked

Describe a Project You Are Proud Of

Describe a project you are proud of through a clear problem, personal technical decisions, outcome evidence, and a specific lesson.

Behavioral & LeadershipProject Deep Dive
1
0
21 people solved
Aug 27, 2026
LinkedIn logo
LinkedIn
Easy
Software Engineer

Review a Web Application Architecture

You are given a high-level architecture diagram for a web application: Client/Web App -> DNS -> Load Balancer -> Application Service -> Database The a...

System DesignSystem Design FundamentalsFault Tolerance & Failover
16
0
155 people solved
Apr 11, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Process multi-currency payments with fees

This question evaluates a software engineer's competency in precise integer arithmetic and rounding semantics, multi-currency FX conversion with basis...

Coding & Algorithms
9
1
101 people solved
Nov 2, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Implement Three Research Coding Tasks

This multi-part question evaluates skills in differentiable linear algebra and automatic differentiation safety, memory- and buffer-aware numerical im...

Coding & Algorithms
10
0
88 people solved
Jan 13, 2026
Google logo
Google
Medium
Software Engineer Locked

Find Shortest Queue with Few Calls

This question evaluates algorithm design and analysis skills, focusing on working with restricted data structure APIs and minimizing total operations ...

Coding & AlgorithmsStacks & Queues
10
2
120 people solved
Apr 10, 2026
Uber logo
Uber
Medium
Data Scientist

How to evaluate lowering ETA?

Uber wants to estimate the business value of reducing ETA, where ETA is the predicted time from when a rider requests a trip until the driver arrives ...

Analytics & ExperimentationMetrics & KPIsCausal Inference
20
0
137 people solved
Feb 1, 2026
Pinduoduo logo
Pinduoduo
Hard
Software EngineerSenior+

Count Longest Substrings After Character Replacements

You are given an uppercase English string s and a nonnegative integer k. A nonempty contiguous substring is valid if you can make all of its character...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
1
0
14 people solved
Aug 22, 2026
Databricks logo
Databricks
Hard
Software Engineer

Design a thread-safe bounded queue

Design a Thread-Safe Bounded MPMC Queue with Timeouts and Fairness Context You are building a reusable, in-memory, bounded queue that supports multipl...

System DesignConcurrencyData Structure Design
48
0
641 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Debug Tokenization and Detokenization

Debug Python tokenization and detokenization functions while preserving their ID-only public interface. Repair iteration-order matching, reject unknow...

Software Engineering FundamentalsDebuggingParsing & Interpreters
59
0
397 people solved
Jul 8, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement in-memory KV store with serialization

Implement an in-memory key-value store in Python that supports setting and retrieving values and can serialize and deserialize the entire store. Defin...

Coding & AlgorithmsData Structure Design
55
0
501 people solved
Aug 8, 2025
Reddit logo
Reddit
Medium
Backend Engineer

Debug and Improve a Load Balancer

Debug and Improve a Load Balancer Clarifying Questions to Ask - Is the load balancer a single process exercise or a distributed production service? - ...

Software Engineering FundamentalsDebuggingFault Tolerance & Failover
9
0
104 people solved
May 6, 2026
Amazon logo
Amazon
Hard
Software EngineerSenior+

Design an Offline Multi-Device E-Book Reader

Design an Offline Multi-Device E-Book Reader Design an e-book reader service with APIs, database schema, and overall architecture. A user may read off...

System Design
3
0
61 people solved
Jan 1, 2026
Sigmacomputing logo
Sigmacomputing
Medium
Software Engineer

Build a Pivot Table Aggregator

Implement a function that builds a pivot table from a list of records. Each record contains a row_key, a column_key, and a numeric value. Requirements...

Coding & Algorithms
8
0
68 people solved
Apr 9, 2026
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