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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
Meta logo
Meta
Medium
Software Engineer

Group Binary Tree Nodes by Vertical Column, Top to Bottom and Left to Right

Given a binary tree, report its node values column by column. The root is at column 0 and row 0. A left child is one column to the left of its parent ...

Coding & AlgorithmsTrees
7
0
56 people solved
Sep 14, 2026
Perplexity logo
Perplexity
Medium
Product Manager

Perplexity Answer Engine Architecture: Retrieval, Grounded Generation and Citations

As a product manager at Perplexity, how would you design the system behind its answer engine? `hint Follow one query end to end Trace a single questio...

System DesignAI Product ManagementRetrieval-Augmented Generation
3
0
26 people solved
Jul 31, 2026
Atlassian logo
Atlassian
Medium
Product Manager

Judging Whether an AI Product Is Working: Metrics, Guardrails and Launch Bars

You are the product manager for an AI tool. How would you define what success looks like for it, and how would you measure it? `hint Generated is not ...

Analytics & ExperimentationMetrics & KPIsAI Product Management
1
0
9 people solved
Sep 26, 2026
Datadog logo
Datadog
Medium
Product Manager

Datadog Deal Review: Weighing a Three-Year Commitment on a Newly Launched Product

You are a product manager at Datadog. A product the company has just launched is priced at \$2M per year, and a large customer wants to sign a three-y...

Product / Decision MakingBusiness Case AnalysisGrowth & Monetization
1
0
16 people solved
Oct 18, 2026
Ramp logo
Ramp
Hard
Software Engineer

Detect recurring transactions from a ledger

You are given a list of credit/debit card transactions. Each transaction has: - transaction_date (YYYY-MM-DD) - merchant (string) - amount (decimal, p...

Coding & Algorithms
73
0
852 people solved
Dec 15, 2025
Google logo
Google
Medium
Software Engineer

Which Area Would You Improve Now to Do Better Work at Google?

In a behavioral interview for a software engineer role at Google, you are asked: if you could improve yourself right now, which area would you want to...

Behavioral & LeadershipSelf-Awareness & Growth
5
0
37 people solved
Oct 2, 2026
Airwallex logo
Airwallex
Medium
Software EngineerSenior+ Locked

Design a Large-File Analysis Report System

Design an authenticated large-file upload and analysis service with resumable storage, idempotent async jobs, versioned reports, and tenant isolation.

System Design
5
0
99 people solved
Sep 2, 2026
Capital One logo
Capital One
Medium
Software Engineer Locked

Sort Every Concentric Matrix Border Clockwise

Sort the values on each concentric border of a rectangular matrix, then write them back clockwise from the layer's top-left cell. The exercise tests p...

Coding & AlgorithmsGrids & MatricesSorting
36
0
303 people solved
Jul 21, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Same-Host Web Crawler: Single-Threaded, Then Concurrent with a Thread-Safe Visited Set

Build a web crawler that starts from one URL, follows links only on the same hostname, strips URL fragments and fetches each page once, first single-t...

Software Engineering FundamentalsConcurrencyGraphs
2
0
48 people solved
Sep 18, 2026
Meta logo
Meta
Medium
Product Manager

Product Improvement Plan for WhatsApp's One-Way Broadcast Channels

You are a product manager at Meta working on WhatsApp. WhatsApp Channels lets people follow organizations, creators and public figures and receive the...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
3
0
26 people solved
Sep 30, 2026
Mercor logo
Mercor
Easy
Software Engineer

Code Review: Find the Problems in a Python Dict-Based Memoization Cache

Review the following Python code, which caches the results of an expensive computation. Explain everything that is wrong with it or risky about it, an...

Software Engineering FundamentalsCode Quality & MaintainabilityCaching
3
0
34 people solved
Aug 8, 2026
Mistral AI logo
Mistral AI
Medium
Machine Learning Engineer Locked

Build a Small Agent or RAG Tool with the Mistral API

This Mistral AI ML system design question asks candidates to design a small agent or RAG tool around the Mistral API. It prepares candidates to discus...

ML System DesignLLM ApplicationsRetrieval-Augmented Generation
33
0
288 people solved
Jul 2, 2026
Netapp logo
Netapp
Easy
System Software Engineer Locked

Compare C Generic Techniques and C++ Smart-Pointer Ownership

Compare type-generic techniques in C using void pointers, macros, and callbacks with ownership mechanisms in modern C++. Explain why C lacks native ov...

Software Engineering Fundamentals
6
0
49 people solved
Aug 9, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Implement a Thread-Safe Per-Key Ordered Executor

Implement per-key FIFO task execution with thread-safe submission, bounded global concurrency, ready-key scheduling, and exception-safe slot release.

Software Engineering FundamentalsConcurrencyData Structure Design
6
0
63 people solved
Sep 10, 2026
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Allocate an Order from the Oldest Inventory Batches

Allocate an order from inventory batches in oldest-first order without mutating the input, honoring the reference-ID tie-break and reporting both per-...

Coding & Algorithms
13
0
158 people solved
Aug 1, 2026
Google logo
Google
Medium
Software Engineer Locked

Implement a Reusable Locker Allocation System

Implement reusable locker-bank operations that allocate the lowest available number, reject invalid stores or pickups, release lockers immediately, an...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
28
0
515 people solved
Aug 14, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Explain Vanishing Gradients in Neural-Network Training

Explain Vanishing Gradients in Neural-Network Training What is the vanishing-gradient problem, why can it occur when training a neural network, and wh...

Machine LearningNeural Networks & Training
3
0
40 people solved
Sep 12, 2026
Rippling logo
Rippling
Medium
Backend EngineerSenior+ Locked

Senior Backend Hiring Manager Deep Dive: Idempotency, SLAs, Changed Decisions, and Pushback

Senior backend hiring manager round covering your proudest project with deep dives on idempotency and SLA definition and monitoring, a technical decis...

Behavioral & LeadershipProject Deep DiveAmbiguity & Decision Making
8
0
81 people solved
Sep 11, 2026
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
290
3
2572 people solved
Jul 7, 2026
Cursor logo
Cursor
Medium
Software Engineer Locked

Implement Deterministic Merkle Hashing for a Repository

Implement deterministic Merkle hashing for files and directories in a repository abstraction. Define stable serialization, child ordering, streaming f...

Software Engineering FundamentalsTreesData Structure Design
74
0
576 people solved
Jul 13, 2026
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