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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
Amazon logo
AmazonGoogle
Medium
Software Engineer

Zero-Filtered Digit Products for Substring Queries

Problem You are given a decimal digit string s and an array of inclusive, zero-based queries [l,r]. For each query, consider s[l..r]. Remove all zero ...

Coding & AlgorithmsArrays & StringsMath & Number Theory
0
0
6 people solved
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
Apple logo
Apple
Medium
Software EngineerNew Grad

Choose between a Java Interface and an Abstract Class

What is an abstract class in Java, what is an interface, and how would you choose between them? Explain the inheritance constraints and the kinds of i...

Software Engineering FundamentalsProgramming Languages
1
0
9 people solved
Mar 14, 2026
Pinterest logo
Pinterest
Medium
Data Scientist Locked

How would you evaluate a carousel launch?

This question evaluates a data scientist's skills in experimental design, product-metric specification, causal inference, and diagnostic analysis for ...

Analytics & ExperimentationLaunch EvaluationMetric Diagnostics
60
0
376 people solved
Mar 10, 2026
Meta logo
Meta
Medium
Data Engineer

Write SQL for active follow connections

Table: follow_events(requester_id INT, target_id INT, event STRING CHECK (event IN ('request_follow','follow_success','follow_reject','unfollow')), ev...

Data Manipulation (SQL/Python)
5
2
54 people solved
Aug 1, 2025
OpenAI logo
OpenAI
Medium
Software Engineer

Implement a serializable key-value store

Implement in C++ an in-memory key-value store with: - put(key: string, value: string), get(key) -> optional<string>, erase(key). - serialize() -> vect...

Coding & AlgorithmsData Structure Design
82
0
673 people solved
Jul 15, 2025
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
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
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
Amazon logo
Amazon
Medium
Software Engineer Locked

Clarify and Solve a Rotate-or-Flip Array Puzzle

Turn an underspecified rotate-or-flip array puzzle into a precise interview problem before solving it. Learn how operation scope, direction, distance,...

Software Engineering Fundamentals
7
0
64 people solved
May 25, 2026
Shopify logo
Shopify
Medium
Product Manager

Shopify PM: Responding to a Public Seller Complaint About a Rival's Faster Payouts

You are a product manager at Shopify. A seller has escalated a complaint on social media after finding a competing payment provider whose instant payo...

Product Design & StrategyMarket & Competitive AnalysisCommunication & Stakeholders
1
0
12 people solved
Apr 13, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Infer an Alien Alphabet from Sorted Words

Infer a valid alien alphabet from words already sorted in that language. Build precedence constraints from adjacent words, reject invalid prefix order...

Coding & Algorithms
3
0
38 people solved
Aug 15, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement node messaging and path discovery

You have a network where each node knows only its parent and its children and can send messages to its parent and children. 1) Implement a sendMessage...

Coding & AlgorithmsFault Tolerance & FailoverDistributed Coordination
59
0
512 people solved
Jul 27, 2025
Atlassian logo
Atlassian
Medium
Machine Learning Engineer Locked

Find LCA in a tree and extend to a DAG

This question evaluates proficiency in graph algorithms and data structures, focusing on lowest common ancestor computation in rooted trees and its ge...

Coding & Algorithms
4
0
70 people solved
Oct 11, 2025
TikTok logo
TikTok
Medium
Data Scientist

Compute and rank top bad advertisers

SQL on ad safety. Assume the following schema and sample rows. Use ANSI SQL. Today is 2025-09-01; interpret “last 7 days” as 2025-08-26 00:00:00 to 20...

Data Manipulation (SQL/Python)
8
0
49 people solved
Oct 13, 2025
Pinterest logo
Pinterest
Medium
Software Engineer

Decide target via subsequence plus/multiply expression

Question Given a sequence of positive 32-bit integers A and an integer target, determine whether there exists a subsequence of A (preserving order, us...

Coding & AlgorithmsBacktracking & Recursion
21
0
309 people solved
Sep 6, 2025
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
Rippling logo
Rippling
Medium
Software Engineer Locked

Design Extensible Interview Coding Systems

Review a broad software engineering interview loop covering object-oriented delivery APIs, rule engines, article voting systems, and a news aggregator...

Software Engineering FundamentalsLow-Level Design (OOP)Search & Feed Systems
30
0
265 people solved
Jun 11, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Design a Currency Exchange Rate Calculation and Conversion System

Design a system that calculates currency exchange rates and uses them to convert amounts between currencies for other services. Only the topic was rep...

System DesignSystem Design FundamentalsCaching
1
0
12 people solved
May 15, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a payment system

This question evaluates a candidate's competency in designing secure, reliable payment architectures, covering API design, transaction lifecycle manag...

System DesignPayments & LedgersDistributed Transactions & Idempotency
11
0
165 people solved
Jan 9, 2026
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