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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
Product Manager

Goals, North-Star Metric and Guardrails for Scam Protection Across Meta's Apps

Imagine you are the product manager for a scam-prevention product at Meta, built to protect people from scams across its apps. Define the goals for th...

Analytics & ExperimentationMetrics & KPIsTrust & Safety
1
0
17 people solved
Sep 9, 2026
Reddit logo
Reddit
Medium
Software Engineer

Implement a sliding-window rate limiter

Problem Design and implement an in-memory rate limiter using a sliding time window. You are given a stream of requests. Each request has: - key (e.g.,...

Coding & AlgorithmsRate LimitingData Structure Design
27
0
308 people solved
Nov 10, 2025
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design a thread-safe high-QPS rate limiter

Question You are building a backend service that must enforce API rate limits. Design and (at a high level) implement a rate limiter, then work throug...

System Design
22
0
168 people solved
Feb 18, 2026
Apple logo
Apple
Medium
Software Engineer

Persist Hardware Signals through an Asynchronous Sink

Design a service that receives hardware signals at about100 requests per second and efficiently persists them to object storage. Discuss asynchronous ...

System DesignData Ingestion & CDCFault Tolerance & Failover
1
0
12 people solved
Jul 25, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Respond to a Reliability Regression Shortly After Deployment

Respond to a post-deployment latency or reliability regression with scoped diagnosis, safe rollback decisions, customer-impact measurement, and preven...

Software Engineering FundamentalsReliability & SRECI/CD & Deployment
4
0
46 people solved
Sep 10, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Merge Sorted Event Streams Through an Iterator

Implement a lazy chronological merge iterator with one head per active stream, stable timestamp ties, has-next semantics, exhausted streams, and bound...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design
9
1
139 people solved
Sep 14, 2026
Amazon logo
AmazonGoogleVisa
Medium
Software Engineer

Clipped Square-Neighborhood Sums for Every Matrix Cell

Problem For every cell(i,j), add all original mat[r][c] with row distance at most k and column distance at most k, keeping only valid matrix positions...

Coding & AlgorithmsGrids & MatricesArrays & Strings
0
0
11 people solved
ByteDance logo
ByteDance
Hard
Data ScientistIntern

Predict Short-Video Engagement with Skewed Data

Predict Short-Video Engagement with Skewed Data You need to predict a future engagement quantity for a short video. Explain what data you would reques...

Machine LearningSupervised LearningFeature Engineering
1
0
22 people solved
Sep 11, 2026
Roblox logo
Roblox
Medium
Software Engineer Locked

Design a Scalable Likes System

This question evaluates system design and distributed-systems skills, specifically scalability, consistency, API and data schema design, indexing stra...

System DesignSystem Design FundamentalsStorage & Sharding
31
0
320 people solved
Apr 1, 2026
CVS Health logo
CVS Health
Easy
Software EngineerSenior+

Describe Your Strongest Technical Area

What is your strongest technical area? Explain the depth of your experience, a problem that demonstrates it, and the limits of your expertise. Constra...

Behavioral & LeadershipSelf-Awareness & Growth
1
0
11 people solved
Jul 25, 2026
Chicago Trading Company logo
Chicago Trading Company
Medium
Software Engineer

Build an Ordered Latest-Quote Container

Build an Ordered Latest-Quote Container Implement a top-level operation runner for incoming stock quotes. At most one quote per symbol may be present....

Coding & Algorithms
8
0
96 people solved
Apr 20, 2026
DoorDash logo
DoorDash
Medium
Product Manager

DoorDash Grocery Subscription Strategy: Make the Go or No-Go Call

You are a product manager at DoorDash, the delivery marketplace best known for restaurant orders. Leadership wants your recommendation on whether the ...

Product Design & StrategyProduct StrategyGrowth & Monetization
1
0
14 people solved
Sep 27, 2026
Arista Networks logo
Arista Networks
Medium
Software Engineer

Distinct Value Pairs With a Target Sum in a Sorted Doubly Linked List

A doubly linked list holds integers sorted in non-decreasing order. Find every pair of nodes whose values add up to a given target. As a follow-up, th...

Coding & AlgorithmsTwo Pointers & Sliding Window
1
0
17 people solved
Jul 11, 2026
Google logo
GoogleBloombergMetaAmazon

Also asked at Meta, Amazon

Medium
Software Engineer

Smallest Index Sequence Matching a Target with at Most One Change

Problem You are given lowercase strings word1 and word2. Choose word2.length indices from word1 in increasing order. Reading the characters at those i...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window
1
0
11 people solved
ByteDance logo
ByteDance
Medium
Data Scientist Locked

Choose Ranking Functions, Customer Value Metrics, and Predictive Models

A machine-learning and analytics fundamentals interview covering SQL ranking functions, defensible high-value-customer definitions, and model selectio...

Machine LearningSQLMetrics & KPIs
7
0
117 people solved
Aug 3, 2026
Visa logo
Visa
Medium
Software Engineer

Minimum Travel Cost Between Array Indices

Minimum Travel Cost Between Array Indices You are given a strictly increasing integer array nums and a list of independent queries queries. For an ind...

Coding & AlgorithmsArrays & StringsGraphs
0
0
11 people solved
Jump Trading logo
Jump Trading
Easy
Software Engineer Locked

Find the Largest Equivalence Class of Fractions

Design an exact and scalable way to find the largest group of fractions with the same value. Explain how you handle signs, zero, duplicates, overflow,...

Statistics & Math
11
0
97 people solved
Jun 14, 2026
Coinbase logo
Coinbase
Medium
Software EngineerSenior+ Locked

Demonstrate Senior Engineering Judgment

Prepare concise behavioral stories that demonstrate senior engineering judgment through difficult projects, competing priorities, disagreement, influe...

Behavioral & LeadershipOwnership & ExecutionAI-Assisted Development
11
0
102 people solved
Jun 12, 2026
Robinhood logo
Robinhood
Easy
iOS Engineer

Design a Photo Library for an iOS App: Thumbnail Grid, Caching, Uploads and Sync

Design a photo library for an iOS app. The report gives only the name of the problem, so its scope is open. A typical scope, to confirm with the inter...

System DesignMobile Architecture & PerformanceFile & Media Storage
0
0
13 people solved
Jul 17, 2026
Amazon logo
AmazonGoogleBloomberg

Also asked at Bloomberg, Meta, Microsoft, Yandex, LinkedIn, Infosys, VK

Easy
Software Engineer

Check Reflected Binary-Tree Structure and Values

Problem Determine whether a binary tree is symmetric about its root: its left and right sides must be mirror images with equal values in corresponding...

Coding & AlgorithmsTrees
1
0
13 people solved
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