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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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

Solve Three Array and Matrix Path Problems

This set of three problems evaluates algorithm design, complexity analysis, and data-structure reasoning across matrix path traversal, interval covera...

Coding & AlgorithmsGrids & MatricesDynamic Programming
20
3
245 people solved
May 30, 2026
xAI logo
xAI
Medium
Software Engineer

Make a Racy BankAccount Deposit Thread-Safe Without Editing the Class, in Python and Go

During a short screening call, the interviewer pastes the following class and tells you that several threads call deposit on the same account object a...

Software Engineering FundamentalsConcurrencyProgramming Languages
2
0
16 people solved
Sep 5, 2026
Datadog logo
Datadog
Medium
Software Engineer Locked

Match Registered Word Queries Against a Log Stream

Process an ordered stream that registers word queries and reports which prior queries fully match each log message. The specification fixes query IDs,...

Coding & Algorithms
5
0
106 people solved
Jun 30, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Explain Training R-Squared After Adding a Random Feature

Explain Training R-Squared After Adding a Random Feature For an ordinary least-squares linear regression fitted on the same training observations, wha...

Statistics & MathRegression & Statistical ModelingModel Evaluation
1
0
12 people solved
Sep 15, 2026
IBM logo
IBM
Medium
Software Engineer Locked

Break Adjacent Duplicate Characters

Practice counting the minimum replacements required to break adjacent duplicates across many lowercase words.

Coding & Algorithms
4
0
43 people solved
Aug 28, 2026
Okta logo
Okta
Medium
Software Engineer

Add a Paginated GET Endpoint to an Existing Java Service, Then Design Its Production DB

In a practical coding exercise on an online coding platform, you work inside a small existing service written in Java. The service already has a POST ...

Software Engineering FundamentalsAPI DesignIndexing & Query Performance
0
0
6 people solved
Sep 15, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

Remove the Maximum Number of Connected Stones

Remove the Maximum Number of Connected Stones Implement max_removed_stones(stones). Each stone occupies a unique integer coordinate [row, column] on a...

Coding & Algorithms
5
0
53 people solved
Aug 19, 2026
Jane Street logo
Jane Street
Hard
Software Engineer Locked

Optimize trade PnL table updates

This question evaluates understanding of incremental aggregation and state management, including handling overlapping predicates, caching expensive or...

Coding & AlgorithmsData Structure Design
50
0
532 people solved
Feb 18, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Build and present a minimal vehicle log playback app from S3 data in two hours

This round follows a system design round in which you designed a real-time 3D playback viewer for recorded vehicle logs. You now get read access to an...

Software Engineering FundamentalsAmbiguity & Decision MakingProject Deep Dive
0
0
8 people solved
Sep 2, 2026
Amazon logo
Amazon
Medium
Software Engineer AI Locked

Fix the Password Reset Workflow

This question evaluates debugging and software engineering fundamentals around authentication flows, including verification code generation and expiry...

Software Engineering FundamentalsDebuggingAuthentication & Authorization
58
0
460 people solved
Apr 14, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer

Design an Agent Harness and Evaluation System

Design an Agent Harness and Evaluation System Design a harness and evaluation platform for a tool-using AI agent. The agent receives a user task, may ...

ML System DesignLLM EvaluationAI Agents
26
0
293 people solved
Apr 19, 2026
Microsoft logo
Microsoft
Medium
Data ScientistSenior+ AI Locked

Build and Defend a Baseline Model from a CSV

Practice an end-to-end data science modeling case using a CSV, from defining the target and preventing leakage to choosing a validation split and base...

Machine LearningML System DesignModel Evaluation
20
0
174 people solved
Jun 29, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design One-to-One Chat

Design a scalable one-to-one chat system. Scope: - Only direct one-to-one messaging is required. - Group chat, public channels, workspace features, an...

System DesignReal-Time SystemsMessaging & Event-Driven
53
1
484 people solved
Mar 2, 2026
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Validate AI-Generated Code Safely

This question evaluates experience with generative AI tools and the competency in validating AI-generated code for correctness, maintainability, and s...

Software Engineering FundamentalsCode Quality & MaintainabilityTesting & Quality
124
1
1045 people solved
May 11, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Count Customers Who Visited on Multiple Dates

Count distinct customers who entered a store on at least two different dates, treating repeated logs for the same customer and date as one visit date.

Coding & AlgorithmsArrays & Strings
60
1
412 people solved
Aug 16, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Lead a Project Through Ambiguous Requirements

Describe leading a project when key requirements or information were still unclear. Rank uncertainties, run reversible experiments, align decision own...

Behavioral & Leadership
6
0
83 people solved
Aug 6, 2026
Bilt Rewards logo
Bilt Rewards
Medium
Software Engineer Locked

Repair and Extend a Transaction Reward Processor

Diagnose and repair a layered transaction reward processor whose tests, file parsing, business-rule calculation, database writes, or queries may be fa...

Software Engineering Fundamentals
6
0
82 people solved
Jul 21, 2026
Rippling logo
Rippling
Medium
Software Engineer

Design an extensible poker-hand evaluator

Design and implement an object-oriented solution for a simplified two-player poker-like game called Camel Cards. The interviewer is explicitly evaluat...

Software Engineering FundamentalsLow-Level Design (OOP)
86
2
1429 people solved
Jan 11, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Count Matrix Cells Whose Row and Column Neighbors Match

This Hudson River Trading software engineering question asks candidates to count matrix cells whose row and column neighbors match. It is useful for p...

Software Engineering FundamentalsGrids & Matrices
20
0
214 people solved
Jul 2, 2026
Salesforce logo
Salesforce
Medium
Software Engineer

Design a coffee ordering system

System Design: Coffee Ordering System Design a system for a coffee shop (and later a chain of stores) that lets customers order drinks for pickup or i...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
824
4
7649 people solved
Jan 22, 2026
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