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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
Salesforce logo
Salesforce
Medium
Software EngineerSenior+

Design a Ride-Hailing Platform: Driver Matching, Surge Pricing and Ride Acceptance

Design the core backend of a ride-hailing platform: a rider requests a trip from their location, the system finds a suitable nearby driver, the driver...

System DesignGeo & Delivery SystemsDistributed Coordination
1
0
21 people solved
May 6, 2026
Databricks logo
Databricks
Medium
Machine Learning EngineerSenior+ Locked

Resolve a Design Conflict

This question evaluates conflict resolution, stakeholder management, technical decision-making, and collaborative leadership skills within a Machine L...

Behavioral & Leadership
11
0
79 people solved
Feb 7, 2026
Experian logo
Experian
Medium
Data Scientist

Explain PCA and L2 Normalization in Machine Learning

Explain PCA and L2 Normalization in Machine Learning Scenario Experian DataLabs Data Scientist technical screen — a machine-learning deep-dive on the ...

Machine LearningML FundamentalsFeature Engineering
19
0
206 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Data Scientist

Write SQL and Pandas for Uber Trips

Assume 'today' = 2025-09-01. You are given the following schema and small ASCII samples. Tables - riders(rider_id, name, signup_date) - drivers(driver...

Data Manipulation (SQL/Python)
2
0
41 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Software EngineerIntern Locked

Reconstruct a binary tree from traversals

This question evaluates understanding of binary tree traversal properties, data structure manipulation, and algorithmic complexity involved in reconst...

Coding & Algorithms
8
0
66 people solved
Jan 11, 2026
HubSpot logo
HubSpot
Easy
Software Engineer

Find a special person using knows(a,b)

Problem You are given n people labeled 0 to n-1 at a party. You can call an API: - knows(a, b) -> bool: returns true if person a knows person b, other...

Coding & AlgorithmsGraphs
18
0
136 people solved
Dec 15, 2025
Capital One logo
Capital One
Medium
Product Manager

Architecture and delivery trade-offs of an app push notification pipeline

As a product manager, walk through the technical components needed to build a push notification system for an app, and the main considerations the tea...

System DesignTechnical Tradeoffs for PMsMobile Architecture & Performance
0
0
11 people solved
Sep 4, 2025
Google logo
GoogleMetaAmazon

Also asked at Amazon, Bloomberg, Microsoft

Easy
Software Engineer

Count Integers With an Even Decimal Length

Problem Return how many positive integers in nums have an even number of decimal digits. Count each input occurrence separately. `cpp class Solution {...

Coding & AlgorithmsMath & Number Theory
1
0
9 people solved
Meta logo
Meta
Medium
Software Engineer

Find Kth Largest and Tree Ancestors

In a technical phone interview, the candidate was asked two coding problems in the same round: 1. K-th largest element in an array Given an unsorte...

Coding & Algorithms
4
0
69 people solved
Feb 22, 2026
Capital One logo
Capital One
Medium
Data Scientist

Analyze ad watch-time with Excel pivots

You are given a flat file with these columns: Date (Excel date, no time zone), UserID, AdID, WatchSeconds (integer ≥ 0), Clicks (integer ≥ 0). Using o...

Analytics & ExperimentationBI & Reporting SystemsMetrics & KPIs
7
0
127 people solved
Oct 13, 2025
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Implement an LRU Cache

This question evaluates competency in designing efficient stateful data structures, understanding cache eviction policies (least recently used), and m...

Coding & Algorithms
2
0
37 people solved
Apr 12, 2026
Jump Trading logo
Jump Trading
Medium
Software Engineer

Explain C++ vector, unordered_map, and virtual functions

Explain C++ vector, unordered_map, and virtual functions In C++, explain: - The amortized and worst-case time complexity of vector::push_back, and how...

Coding & AlgorithmsProgramming Languages
38
0
279 people solved
Jul 16, 2025
DRW logo
DRW
Medium
Data Scientist

Solve Markov and distribution expectation problems

Solve Markov and distribution expectation problems Statistics, Linear Algebra, and Game Theory Fundamentals 1) Stationary Distribution of a Finite Mar...

Statistics & Math
8
0
108 people solved
Aug 4, 2025
PharmEasy logo
PharmEasy
Medium
Product Manager

Designing a Laundry Machine That Blind Users Can Operate Without Sighted Help

Design a washing machine for people who are blind. Explain which users you are designing for, what makes doing laundry hard for them with the machines...

Product Design & StrategyAccessibility & Inclusive DesignProduct Sense
1
0
13 people solved
Apr 23, 2026
Robinhood logo
Robinhood
Medium
Product Manager

Robinhood API Design: Endpoints for Onboarding, Funding, Market Data and Orders

Robinhood's mobile and web apps run on backend APIs. What are some of the endpoints you would expect Robinhood to have? `hint Before the first trade L...

System DesignTechnical Tradeoffs for PMsAPI Design
1
0
13 people solved
Dec 4, 2024
Uber logo
Uber
Hard
Software Engineer

Design MapReduce for schedules

Design a scalable job to compute rolling 15-minute meeting concurrency and room utilization You are given a massive log of meeting events with fields:...

System DesignBatch & Stream ProcessingIntervals & Scheduling
8
0
150 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Peer-to-Peer File Distribution: Discovery, Chunked Transfer and Integrity Checks

You are asked to design a peer-to-peer file sharing system. Users publish files they hold, and other users download those files directly from the peer...

System DesignFile & Media StorageNetworking
0
0
8 people solved
Jan 8, 2026
Google logo
Google
Hard
Software Engineer

Design quota enforcement for high concurrency

System Design: Quota Enforcement Service at Very High QPS Context You are designing a multi-tenant quota and rate-limiting service used by many backen...

System DesignRate LimitingAPI Design
20
0
197 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Business AnalystSenior+

Optimize invites under capacity constraints

You have n donors (n up to 100,000). For each donor i you know: p_online[i] (probability of donating if emailed), a_online[i] (expected donation condi...

Coding & AlgorithmsBusiness Case AnalysisDynamic Programming
16
0
134 people solved
Oct 13, 2025
Apple logo
Apple
Medium
Product Manager

Explain the End-to-End Flow of an In-Store Credit Card Payment, from Swipe to Payout

A customer pays at a store by swiping a credit card through the checkout terminal. Explain what happens next: which parties are involved, what informa...

Software Engineering FundamentalsTechnical Tradeoffs for PMsPayments & Ledgers
1
0
9 people solved
Jan 7, 2026
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