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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
Harvey logo
Harvey
Medium
Software Engineer Locked

Design Cloud File Storage

This question evaluates system design competency, specifically understanding storage architectures, the separation of metadata versus blob/object stor...

System DesignFile & Media StorageStorage & Sharding
44
1
440 people solved
May 2, 2026
Google logo
GoogleAmazonSamsung

Also asked at Samsung, Bloomberg, Microsoft, Meta

Easy
Software Engineer

Identify a Hidden Number from Comparison Replies

Identify a Hidden Number from Comparison Replies A service chooses one fixed integer from 1 through n, inclusive. Implement Solution.guessNumber(n) to...

Coding & AlgorithmsBinary Search
0
0
8 people solved
Google logo
GoogleAmazonRedfin

Also asked at Redfin, TCS, Bloomberg, Meta, Microsoft, Salesforce, Intuit, NVIDIA

Easy
Software Engineer

Choose Three Values with the Largest Product

Problem Select three distinct array positions in nums and return the largest product of their values. Values may be negative, positive or zero. `cpp c...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
1
0
14 people solved
Optiver logo
Optiver
Hard
Software EngineerIntern

Optimize flight and cargo bookings for profit

OptiCargo: make the booking algorithm profitable You are given two streams/lists: - Flights you may attempt to book. Each flight has: - flight_id ...

Coding & AlgorithmsDynamic ProgrammingData Structure Design
278
1
2229 people solved
Dec 5, 2025
Google logo
Google
Medium
Software Engineer Locked

Handle Policy, Confidentiality, Integrity, and Conflict-of-Interest Scenarios

Reason through workplace scenarios involving prohibited gifts, vendor conflicts, confidential information, inaccurate credit, deadline pressure, and u...

Behavioral & Leadership
8
0
63 people solved
Aug 16, 2026
Capital One logo
Capital One
Easy
Business AnalystSenior+

Should a Restaurant Partner with Groupon?

A restaurant is deciding whether to partner with a daily-deals platform such as Groupon. You are asked to work through the unit economics and make a r...

Analytics & ExperimentationBusiness Case Analysis
124
0
1153 people solved
Jan 21, 2026
Google logo
Google
Medium
Software Engineer Locked

Design a Security Monitoring Framework

This question evaluates a candidate's understanding of designing security monitoring frameworks for cloud infrastructure, covering competencies in sys...

System DesignSystem Design FundamentalsOperating Systems
154
0
1162 people solved
May 26, 2026
Google logo
GoogleBloombergMicrosoft

Also asked at Microsoft, Meta, Amazon, IBM

Medium
Software Engineer

Report Consecutive Historical Price Spans as Quotes Arrive

Problem Implement StockSpanner() and next(price). Each next call appends today's price and returns the longest suffix of days, including today, whose ...

Coding & AlgorithmsData Structure DesignStacks & Queues
1
0
16 people solved
Capital One logo
Capital One
Medium
Product Manager

Improve Capital One Shopping

You are a Product Manager discussing Capital One Shopping, a consumer product that helps online shoppers find deals, coupons, rewards, and price compa...

Product Design & StrategyProduct Design & ImprovementGrowth & Monetization
125
1
839 people solved
Jun 12, 2025
Databricks logo
Databricks
Medium
Software Engineer

Track Customer Revenue and Referral Revenue

Track Customer Revenue and Referral Revenue Problem Implement a top-level function that processes an in-memory customer revenue tracker through a lite...

Coding & Algorithms
14
2
174 people solved
Apr 18, 2026
OpenAI logo
OpenAI
Medium
Product Manager

Detecting and Mitigating Harmful Bias in an AI System: A PM's Plan

As a product manager at OpenAI, how would you keep an AI system you are responsible for from reinforcing harmful biases? `hint Name the harm before th...

Machine LearningAI Product ManagementFairness & Bias
3
0
24 people solved
Aug 18, 2026
Mixpanel logo
Mixpanel
Medium
Data Scientist

Count Users Active After Signup

Count Users with an Event On or After Signup You have these tables: | Table | Column | Meaning | |---|---|---| | users | user_id | User identifier. | ...

Data Manipulation (SQL/Python)SQL
5
1
39 people solved
Sep 14, 2026
Amazon logo
Amazon
Medium
Machine Learning Engineer Locked

Predict Click Probability for Music Recommendations

Design music recommendation CTR prediction with song embeddings, sparse-feature handling, model comparison, calibration, and online evaluation.

ML System DesignCTR Prediction & Ads MLFeature Engineering
5
0
87 people solved
Sep 11, 2026
OpenAI logo
OpenAI
Medium
Frontend Engineer

Build a Streaming Chat Input

Implement a minimal front-end chat interface, similar to a stripped-down AI assistant (think a bare-bones ChatGPT). The user types a prompt, submits i...

Coding & AlgorithmsState ManagementReact & UI Frameworks
45
0
405 people solved
Apr 25, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Design a Devbox Service for On-Demand Remote Development Environments

Design a devbox service: a system that lets engineers get a remote development environment (a "devbox") on demand, work in it from their own laptop, a...

System DesignSystem Design FundamentalsContainers & Orchestration
12
0
112 people solved
Sep 8, 2026
Stripe logo
Stripe
Medium
Software EngineerSenior+ Locked

Design a Count-Metrics Monitoring Platform

Design a count-metrics monitoring platform that supports recent counts, rates, label grouping, and alerts while handling duplicate and late events, re...

System Design
32
0
220 people solved
Aug 9, 2026
Infosys logo
InfosysGoogleAmazon

Also asked at Amazon, Bloomberg, TikTok

Medium
Software Engineer

Best Total After Bounded Block Replacement

Problem Split arr into nonempty contiguous blocks, each containing at most k elements. Replace every element in a block by that block's largest origin...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
11 people solved
MongoDB logo
MongoDB
Medium
Software EngineerSenior+ Locked

Reason About Recursive Key Search in Nested JSON

Explain recursive key lookup over structured nested JSON while clarifying duplicate matches, missing keys, list traversal, and portable return values.

Software Engineering Fundamentals
7
1
129 people solved
Aug 18, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Deshaw, MathWorks, Meta, Goldman Sachs, Bloomberg, eBay, Zeta Global, Uber, DP world, Nutanix, 6Sense

Hard
Software Engineer

Minimize Cameras That Cover a Tree Node and Its Neighbors

Problem A camera installed on a tree node monitors that node, its parent if present, and its immediate children. Return the fewest cameras needed to c...

Coding & AlgorithmsTreesDynamic Programming
1
0
14 people solved
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Power-Plant System from an Underspecified Prompt

Practice turning an underspecified power-plant design topic into explicit requirements, estimates, APIs, schemas, distributed jobs, queues, and failur...

System Design
19
0
165 people solved
Aug 15, 2026
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