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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
OpenAI logo
OpenAI
Medium
Software Engineer

Implement KV store serialization

Implement serialization and deserialization for an in‑memory key‑value store to and from a contiguous bytes buffer. Keys are UTF‑8 strings; values may...

Coding & AlgorithmsParsing & Interpreters
156
0
1212 people solved
Sep 6, 2025
Amazon logo
Amazon
Easy
Software Engineer Locked

Design a Concurrent Restaurant Waitlist and Seating System

Design a concurrent restaurant waitlist that prefers an exact table-size match before the earliest party that fits. Cover atomic party and table trans...

Software Engineering FundamentalsLow-Level Design (OOP)Concurrency
280
3
2482 people solved
Jul 7, 2026
LinkedIn logo
LinkedIn
Hard
Machine Learning Engineer

Tight-Deadline Launch, Disagreeing With a Manager, and Guiding a Junior Scientist

This behavioral segment of a one-hour machine learning engineer phone screen followed a brief introduction. Three questions were asked back to back, a...

Behavioral & LeadershipOwnership & ExecutionConflict & Collaboration
0
0
8 people solved
Aug 26, 2026
Hudson River Trading logo
Hudson River Trading
Easy
Machine Learning Engineer

Count People Reaching the Boundary

You are given a 1-dimensional line segment with a right boundary at position L. There are N people with initial positions p1, p2, ..., pN, and there i...

Coding & Algorithms
12
0
99 people solved
Apr 11, 2026
ByteDance logo
ByteDance
Hard
Software Engineer Locked

Find Unique One-Use Combination Sums with Negative Values

Find every unique combination that reaches a target when each input occurrence may be used once and candidates may be negative. The prompt defines dup...

Coding & Algorithms
8
0
76 people solved
Sep 5, 2026
MongoDB logo
MongoDB
Hard
Software Engineer Locked

Design a Scalable Read-Prefetch System

Design a scalable read-prefetch service with prioritized deduplicated candidates, bounded memory and concurrency, expiration and cancellation, demand ...

System Design
4
0
57 people solved
Aug 14, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Frequency Stack with Recency Tie-Breaking

Implement a frequency stack whose pop operation returns the most frequent value and breaks frequency ties by recency.

Coding & Algorithms
12
3
98 people solved
Aug 28, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Design an Alert Notification Service for Downstream Consumers

Design an alert service that accepts producer events and delivers each one independently to matching downstream consumers. The architecture must isola...

System DesignMessaging & Event-DrivenDistributed Transactions & Idempotency
63
0
471 people solved
Aug 4, 2026
Meta logo
Meta
Medium
Software EngineerSenior+ AI

Solve Parser, Trading, Tree, And Deck Tasks

You will solve several independent programming tasks. For each task, implement clean, tested code and state the time and space complexity. 1. Validate...

Coding & Algorithms
22
0
150 people solved
Apr 9, 2026
Meta logo
Meta
Hard
Software Engineer

Find Nearby High Scores in a Large Game Leaderboard

Design a video-game score leaderboard with players, games, friendship relationships, and one stored high score per player-game pair. After a player fi...

System DesignSystem Design FundamentalsIndexing & Query Performance
1
0
13 people solved
Sep 4, 2026
Google logo
Google
Hard
Data Scientist Locked

Evaluate AI Workflow Product Metrics

This question evaluates product analytics and experimentation skills—specifically metric definition, funnel construction, segmentation, instrumentatio...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
60
0
566 people solved
May 18, 2026
Jump Trading logo
Jump Trading
Easy
Software Engineer Locked

Expand a Serial and Parallel Task Composition Specification

Parse a serial and parallel workflow specification with nested arguments and quoted text, then expand its alternatives into ordered composed expressio...

Coding & Algorithms
8
0
91 people solved
Aug 12, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Count Occurrences of Each Suffix Maximum

Preprocess an integer array from right to left so each suffix query returns how many times that suffix's maximum value occurs, including repeated quer...

Coding & Algorithms
9
0
85 people solved
Aug 15, 2026
Headway logo
Headway
Medium
Software Engineer Locked

Debug a Stale Insurance Eligibility Status

A patient list shows a cached eligibility_status from UserInsurance, while each insurance record has timestamped EligibilityLookup snapshots. Make the...

Software Engineering FundamentalsDebuggingCaching
10
0
126 people solved
Jul 25, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Resolve Package Dependencies with Cycle Detection

Produce a deterministic dependency-first build order for every package reachable from a target. Candidates must handle shared dependencies, references...

Coding & Algorithms
7
0
62 people solved
Jul 29, 2026
Rippling logo
Rippling
Medium
Software Engineer AI Locked

Design a Driver Payroll System

This question evaluates a candidate's understanding of data structure design, time-series aggregation, and algorithmic complexity for in-memory accoun...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
29
0
238 people solved
Mar 21, 2026
Netflix logo
Netflix
Hard
Software EngineerSenior+

Implement a Versioned Key-Value Store

Design and implement an in-memory versioned key-value store. Requirements: - put(key, value, timestamp): store value for key at the given integer time...

Coding & Algorithms
6
0
88 people solved
Apr 5, 2026
Akuna Capital logo
Akuna Capital
Hard
Software Engineer Locked

Design a Tiered Expiring Item Store

Design a tiered in-memory item store that places weighted items under capacity limits and retrieves from the highest-priority eligible level while res...

Software Engineering Fundamentals
11
0
102 people solved
Aug 12, 2026
xAI logo
xAI
Medium
Frontend Engineer

Load and Display a React List with useEffect

Implement a React component that uses useEffect to load and display a list. Constraints & Assumptions The reported task names useEffect and a list but...

Software Engineering FundamentalsReact & UI FrameworksAPI Integration & HTTP Clients
1
0
12 people solved
Sep 15, 2026
Tesla logo
Tesla
Medium
Software Engineer Locked

Coordinate Counter Updates Across Threads

Coordinate two threads that increment a counter from zero: one snapshots at 10, the other snapshots one second after a recorded synchronized launch, t...

Software Engineering Fundamentals
3
0
34 people solved
Aug 24, 2026
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