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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
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Distributed Rate-Limiting Service

Design a distributed rate limiter for per-user, per-tenant, route, and global API policies under a tight latency budget. Make accuracy and availabilit...

System DesignRate LimitingConsistency & Availability
9
0
188 people solved
Jul 2, 2026
Google logo
Google
Medium
Software Engineer

Design an Enterprise AI Adoption Agent for a Global Company

Design an enterprise AI adoption agent for a global company with internal data, tools, and security constraints. `hint Hint 1 Start by stating assumpt...

System DesignAI AgentsAuthentication & Authorization
17
0
121 people solved
Mar 6, 2026
Confluent logo
Confluent
Medium
Software Engineer

Implement tail N lines

Question Implement a utility tail(path: string, N: int) (and an equivalent stream variant) that prints the last N lines of input without loading the w...

Coding & AlgorithmsData Structure DesignOperating Systems
68
0
475 people solved
Sep 6, 2025
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
DoorDash logo
DoorDash
Easy
Software Engineer

Design an alert notification system

Design a multi-tenant alert notification system for operational incidents. Monitoring sources send events when checks fire or recover. Users can confi...

System DesignSystem Design FundamentalsMessaging & Event-Driven
25
0
348 people solved
Jan 28, 2026
Zscaler logo
Zscaler
Medium
Software EngineerSenior+ Locked

Design a Multi-Dimensional Job Rate Limiter

Design a job rate limiter whose admission decision may consume effort, per-user, hourly, and daily quotas at once. Candidates clarify scope and window...

Software Engineering Fundamentals
1
0
24 people solved
Jul 30, 2026
Glean logo
Glean
Medium
Software Engineer Locked

Prioritizing QA Work Under Deadline Pressure

This question evaluates a candidate's ability to prioritize testing work and manage quality risk when time is insufficient to cover everything before ...

Behavioral & Leadership
6
0
61 people solved
Jun 19, 2026
Whatnot logo
Whatnot
Medium
Software Engineer

Build a Tic-Tac-Toe App

Implement a simple Tic-Tac-Toe mobile app that can be completed in a 45-minute coding interview. Requirements: - Display a 3x3 board. - Support two lo...

Coding & Algorithms
4
0
77 people solved
Jan 24, 2026
Amazon logo
Amazon
Medium
Software Engineer

Deliver Under a Tight Deadline with Clear Tradeoffs

Tell me about a time you had to meet a tight deadline. Give a concise account of the situation, your actions, and the result, while making the importa...

Behavioral & LeadershipOwnership & ExecutionPrioritization & Tradeoffs
2
0
17 people solved
Apr 26, 2026
Optiver logo
Optiver
Easy
Data Scientist

Compute probabilities and expectations in random processes

This is a rapid-fire probability and expectation round: a sequence of short, self-contained brain-teasers solved on a whiteboard. The interviewer expe...

Statistics & MathProbabilityPuzzles & Brainteasers
31
0
368 people solved
Nov 19, 2025
The Trade Desk logo
The Trade Desk
Medium
Software Engineer

Implement a Cloud Storage Service

Implement an in-memory cloud storage system. Build the class incrementally; later levels must preserve all behavior from earlier levels. File names ar...

Coding & Algorithms
13
0
93 people solved
Apr 10, 2026
Google logo
Google
Medium
Machine Learning Engineer

Solve meeting scheduling and robot cleaning tasks

You are given two independent coding problems. --- Problem 1: Prioritized Meeting Scheduling You are asked to schedule meetings in a single meeting ro...

Coding & AlgorithmsDynamic ProgrammingBacktracking & Recursion
16
1
193 people solved
Dec 8, 2025
Discord logo
Discord
Hard
Data Engineer

Implement Game Metadata Lookups

You are given a list of game metadata records. Build an in-memory representation that can store each game's name, release date, platforms, genre, publ...

Coding & AlgorithmsData Structure Design
18
1
233 people solved
Apr 3, 2026
Citadel logo
Citadel
Medium
Site Reliability Engineer

Design Safe Configuration and Deployment for Hundreds of Services

Design Safe Configuration and Deployment for Hundreds of Services Replace hand-edited files, environment variables, NFS, and SSH scripts for 200-plus ...

System Design
6
0
57 people solved
May 8, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

How to answer common recruiter screen questions

Question You are in an initial recruiter / phone screen for a software engineering role at OpenAI. The recruiter asks a mix of logistics, employment-h...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
34
0
384 people solved
Feb 2, 2026
Upstart logo
Upstart
Medium
Software Engineer

Solve Five OA Coding Tasks

This is an online-assessment screen consisting of five independent coding tasks. Each task is self-contained — there is no shared state between them —...

Coding & AlgorithmsArrays & StringsMath & Number Theory
21
0
407 people solved
Apr 10, 2026
Amazon logo
Amazon
Medium
Frontend EngineerNew Grad Locked

Own a Mistake with Real Consequences

Tell a concrete story about a consequential mistake by owning the decision, tracing its impact, containing harm, communicating candidly, and showing t...

Behavioral & Leadership
0
0
12 people solved
Aug 22, 2026
DoorDash logo
DoorDash
Hard
Data Scientist

Evaluate a new ranking model

A food-delivery company serves homepage store recommendations with ranking model V1.1. A new model V2.0 adds several new features and may require a di...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
24
0
307 people solved
Feb 6, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Arrange Match Results in Repeating Win-Draw-Loss Order

Rearrange a multiset of win, draw, and loss markers into repeated W-D-L rounds, skipping any marker once its supply is exhausted. The problem tests ex...

Coding & Algorithms
10
0
84 people solved
Jul 21, 2026
IBM logo
IBM
Medium
Software Engineer

Describe open-source contribution experience

Question What is your experience contributing to open-source projects? Walk the interviewer through your background in detail, covering: 1. Projects a...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
20
0
213 people solved
Aug 14, 2025
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