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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
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Return a topological ordering of a graph

This question evaluates understanding of graph algorithms—particularly topological sorting and cycle detection—and competency in ordering dependencies...

Coding & AlgorithmsGraphs
5
0
93 people solved
Jan 22, 2026
Uber logo
Uber
Medium
Software Engineer

Count subarrays with ≥k identical pairs

Question LeetCode 2537. Count the Number of Good Subarrays – Given an integer array nums and an integer k, return the number of contiguous subarrays i...

Coding & Algorithms
7
0
92 people solved
Aug 4, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Generate NFT metadata and ensure uniqueness

You are implementing an NFT metadata generator. Each NFT is defined by selecting exactly one trait value from each trait category. You must generate a...

Coding & AlgorithmsMath & Number Theory
25
0
333 people solved
Mar 1, 2026
Amazon logo
AmazonBloomberg
Hard
Software Engineer

Best Recovery Score Within a Path Budget

Best Recovery Score Within a Path Budget You are given a directed acyclic graph with nodes 0 through n - 1. Each entry [u, v, cost] in edges is a dire...

Coding & AlgorithmsGraphsBinary Search
0
0
8 people solved
xAI logo
xAI
Medium
Software Engineer

Design a Retrieval-Augmented Generation (RAG) System

Design a retrieval-augmented generation (RAG) system for a production question-answering product. Users ask natural-language questions, and the system...

ML System Design
5
0
83 people solved
Aug 7, 2025
Google logo
Google
Hard
Machine Learning Engineer

Design data structure similar to LRU cache

You are asked to design and implement a data structure that behaves similarly to an LRU (Least Recently Used) cache, but with a small variation: - The...

Coding & AlgorithmsData Structure DesignLinked Lists
13
1
154 people solved
Dec 8, 2025
Amazon logo
Amazon
Medium
Software Engineer

Finding the Root Cause of an Intermittent Failure When the Obvious Metrics Look Healthy

Tell me about a time when a system was failing intermittently, and the very obvious metrics were all looking good. How did you find the root cause, an...

Behavioral & LeadershipDebuggingObservability
4
0
33 people solved
Sep 10, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Build a Delivery Payout Calculation API

Build a Delivery Payout Calculation API Build a payment-service endpoint POST /payout that accepts a delivery worker ID, requests that worker's order-...

Software Engineering Fundamentals
11
0
160 people solved
Mar 31, 2026
Meta logo
Meta
Hard
Software Engineer

Design a ticketing purchase system

System Design: High-Concurrency Ticket Purchasing With Seat Maps You are asked to design an end-to-end ticketing system for large on-sale events (e.g....

System Design
11
0
88 people solved
Aug 14, 2025
ByteDance logo
ByteDance
Hard
Backend EngineerNew Grad Locked

Backend Fundamentals Deep Dive: MySQL Internals, Redis, and the HTTP/HTTPS Request Lifecycle

This question tests deep backend engineering knowledge across three core domains: MySQL InnoDB internals (logging, indexing, isolation), Redis persist...

Software Engineering FundamentalsDatabase InternalsConsensus & Replication
11
0
107 people solved
Jun 15, 2026
Airbnb logo
Airbnb
Hard
Software EngineerSenior+

Design an Airbnb wallet with holds and payouts

Design and Implement an Airbnb-Style Wallet (Ledger, Holds, FX, Idempotency) Problem Design and implement an Airbnb-style wallet system. This is an OO...

System DesignPayments & LedgersDistributed Transactions & Idempotency
50
1
553 people solved
Sep 6, 2025
Squarepoint logo
Squarepoint
Medium
Software Engineer Locked

Defend a Redis Choice and Explain Database Index Trade-offs

Explain when Redis improves a real workload and when it adds needless operational risk. Compare cache correctness and failure handling with database i...

Software Engineering Fundamentals
5
0
101 people solved
Jul 12, 2026
LinkedIn logo
LinkedIn
Hard
Software Engineer

Design a scalable calendar system

System Design: Multi-Tenant Calendar at Massive Scale You are designing a multi-tenant calendar platform used by hundreds of millions of users across ...

System DesignSystem Design FundamentalsAPI Design
21
0
165 people solved
Sep 6, 2025
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer II Locked

Explain Stack Use Cases and Mutability in Python Containers

Explore practical LIFO stack uses, Python mutation and rebinding, aliasing and identity, and why a tuple containing a mutable list is itself unhashabl...

Software Engineering Fundamentals
3
0
33 people solved
Aug 8, 2026
Meta logo
Meta
Medium
Software Engineer Locked

Return a Shortest Path Through a Binary Grid

Return one deterministic shortest path through an eight-directional binary grid using breadth-first search. Learn parent tracking, ordered neighbor ex...

Coding & Algorithms
7
0
50 people solved
Aug 8, 2026
Upstart logo
Upstart
Easy
Data Scientist Locked

Identify binomial model and compute moments

This question evaluates understanding of probability distributions and independence by identifying the binomial model and computing its probability ma...

Statistics & MathProbability
15
0
172 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Hard
Data Scientist

Design experiments for marketplace product changes

You are interviewing for a Data Scientist role at a food-delivery marketplace such as DoorDash. For each scenario below, explain how you would evaluat...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
15
0
261 people solved
Feb 9, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Resolve Two Knights-and-Knaves Statements

Resolve a two-person knights-and-knaves puzzle through complete case analysis. The solution shows that assigning A as a knight and B as a knave is con...

Statistics & Math
2
0
21 people solved
Aug 16, 2026
Amazon logo
Amazon
Medium
Product Manager

Behavioral: Ambiguity & Conflict Resolution

Behavioral Prompt: Ambiguity and Conflict Resolution You are interviewing for a Product Manager phone screen at a large, customer-obsessed, data-drive...

Behavioral & LeadershipAmbiguity & Decision MakingConflict & Collaboration
25
0
187 people solved
Jul 4, 2025
Rippling logo
Rippling
Medium
Software Engineer

Track article votes and last three flips

Problem Design an in-memory data structure for voting on articles. Users can vote on an article with either: - Thumbs up - Thumbs down - No vote (user...

Coding & AlgorithmsData Structure Design
47
0
386 people solved
Oct 17, 2025
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