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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
Rippling logo
Rippling
Medium
Software Engineer AI Locked

Implement Article Vote Tracking

This question evaluates data structures, state-management, and algorithmic skills for tracking per-user votes, detecting vote flips, maintaining a mos...

Coding & AlgorithmsData Structure DesignArrays & Strings
29
1
389 people solved
May 14, 2026
OpenAI logo
OpenAI
Hard
Software EngineerSenior+ Locked

Design a User-Respecting Smart-Grid Controller

Design a resilient smart-grid controller that manages overload while honoring owner consent, critical loads, intermittent devices, and fairness.

System Design
22
0
244 people solved
Aug 21, 2026
Mercor logo
Mercor
Hard
Software Engineer Locked

Find the Probability That One Shop Supplies the Top Two Coffees

Compute the probability that two coffees from one shop outrank both from another under an explicit exchangeable no-ties model.

Statistics & MathProbabilityPuzzles & Brainteasers
7
0
83 people solved
Sep 3, 2026
Amazon logo
AmazonUberMetaMicrosoft

Also asked at Meta, Microsoft

Hard
Software Engineer

Find the Nearest Different Decimal Palindrome

Problem The string n represents a positive integer. Return the nearest palindromic integer as a decimal string, excluding the input integer itself. Mi...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
1
0
12 people solved
Amazon logo
AmazonMicrosoftGoogleMeta

Also asked at Google, Meta

Easy
Software Engineer

Filter Phone Numbers in Two Exact Formats

Problem Write a one-line Bash script that reads file.txt and prints its valid phone-number lines to standard output. The file contains one phone-numbe...

Coding & AlgorithmsString AlgorithmsProgramming Languages
0
0
5 people solved
Robinhood logo
Robinhood
Medium
Frontend Engineer

Design a Photo Album App

Design a web-based photo album application for the browser (a frontend-focused system design). The product has three main screens, each provided to yo...

System DesignState ManagementReact & UI Frameworks
13
0
218 people solved
Apr 5, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Implement 1NN with NumPy

This question evaluates implementing a 1-nearest-neighbor classifier with NumPy, testing skills in vectorized numerical computation, distance metrics,...

Machine LearningML Coding
324
4
3061 people solved
May 19, 2026
Rippling logo
Rippling
Hard
Software Engineer Locked

Explain Your Current and Previous Engineering Roles

Introduce current and previous engineering roles with clear team purpose, personal scope, concrete responsibilities, and relevant progression.

Behavioral & LeadershipMotivation & Fit
3
0
33 people solved
Sep 13, 2026
PayPal logo
PayPal
Medium
Product Manager

Diagnosing a Venmo Sign-Up Conversion Collapse to 2% After a UX Redesign

You are a product manager on Venmo, PayPal's peer-to-peer payments app. After a new user experience was rolled out, the sign-up rate fell to 2%. What ...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
1
0
13 people solved
Oct 12, 2026
Glean logo
Glean
Medium
Data Scientist

Google Slides Metrics: What to Track and How to Pick Three KPIs

You are the data scientist for Google Slides, the presentation editor in which people create decks, edit them together in real time, comment on and sh...

Analytics & ExperimentationMetrics & KPIs
0
0
3 people solved
Oct 25, 2026
Commure logo
Commure
Hard
Software Engineer

Filter People by Optional Criteria

Filter People by Optional Criteria Implement filter_people(people, min_age, max_age, occupations, min_salary, max_salary). Each item in people is a di...

Coding & Algorithms
8
0
105 people solved
Apr 30, 2026
Fora Travel logo
Fora Travel
Medium
Software Engineer

Design Travel Page Data APIs

A travel advisory company is launching a customer-facing product experience for browsing and requesting travel services. You are given mockups for thr...

Software Engineering FundamentalsAPI DesignSystem Design Fundamentals
20
0
270 people solved
Apr 6, 2026
Citadel logo
Citadel
Medium
Software Engineer Locked

Maximize Earnings by Converting Days Off

Maximize total schedule earnings by converting at most k days off into workdays, accounting for both daily pay and bonuses for consecutive workdays.

Coding & AlgorithmsGreedySorting
25
0
251 people solved
Aug 7, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design a High-Concurrency Incident Ticket Correlation Platform

Design a high-concurrency incident ticket platform with user and system links, interval-based status history, asynchronous idempotent correlation, ind...

System Design
13
0
121 people solved
Aug 15, 2026
Wayfair logo
Wayfair
Medium
Applied Scientist Locked

Rank Homepage Modules for an E-Commerce Product

Rank e-commerce homepage modules using business objectives, seasonal eligibility, slot effects, slate diversity, cold-start exploration, and page-leve...

ML System DesignMetrics & KPIsExperiment Design (A/B Testing)
1
0
27 people solved
Sep 10, 2026
Google logo
Google
Medium
Product Manager

Diagnosing a YouTube Recommendation Engagement Drop: A Metrics Plan

You work as a product manager on YouTube and notice that users are engaging less with recommended videos than before. Which metrics would you track to...

Analytics & ExperimentationMetric DiagnosticsMetrics & KPIs
1
0
15 people solved
Aug 26, 2026
Nextdoor logo
Nextdoor
Medium
Software Engineer Locked

Group Photos and Sort Feed Items

This question evaluates proficiency in list/sequence transformation, detecting consecutive runs, grouping elements, aggregating attributes, and perfor...

Coding & Algorithms
19
0
160 people solved
May 31, 2026
Brex logo
Brex
Medium
Software Engineer

Design a Peer-to-Peer Money Transfer System

Design a peer-to-peer money-transfer product. Users can hold an account, send money to another user, view transfer history, and see an accurate balanc...

System DesignPayments & LedgersDistributed Transactions & Idempotency
31
1
417 people solved
May 8, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Explain Embeddings, Positive Labels, and Retraining in a Recommendation Project

Explain Embeddings, Positive Labels, and Retraining in a Recommendation Project Discuss a content-recommendation project you worked on. Explain the pa...

Machine LearningRecommendation SystemsAnnotation & Label Quality
2
0
31 people solved
Sep 12, 2026
Instacart logo
Instacart
Medium
Machine Learning Engineer

Square a Sorted Array in Linear Time

Given integers already in nondecreasing order, return their squares in nondecreasing order. Seek a linear-time solution instead of sorting the squares...

Coding & AlgorithmsTwo Pointers & Sliding Window
1
0
15 people solved
Jul 15, 2026
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