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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
Google logo
Google
Medium
Software Engineer

Design at-least-once notification delivery

System Design: At-Least-Once Notification System Context Design a multi-channel notification platform (email, SMS, push, in-app) that guarantees at-le...

System DesignMessaging & Event-DrivenDistributed Transactions & Idempotency
17
0
156 people solved
Sep 6, 2025
Zipline logo
Zipline
Medium
Software Engineer

Design a Redundant Railroad Crossing

Design a safe and redundant control system for an at-grade railroad crossing used by road vehicles and pedestrians. The system should detect approachi...

System Design
7
0
72 people solved
Jan 25, 2026
Lyft logo
Lyft
Medium
Machine Learning EngineerIntern

Design an HR Document AI Platform

Design an internal AI platform for a bank's HR organization. The platform should ingest HR documents such as policies, benefits guides, onboarding man...

ML System DesignRetrieval-Augmented GenerationAuthentication & Authorization
18
0
125 people solved
Mar 12, 2026
Google logo
Google
Medium
Data Scientist

Test a coefficient and explain t-distribution

In OLS, test whether feature j is relevant. a) State H0: β_j = 0 versus H1: β_j ≠ 0 and construct the t‑statistic t_j = b̂_j / se(b̂_j), giving the ex...

Statistics & MathHypothesis TestingProbability
8
0
147 people solved
Oct 13, 2025
Two Sigma logo
Two Sigma
Easy
Data Scientist

Fill Missing Time-Series Values with Linear Interpolation (Duplicate Timestamps Allowed)

Fill Missing Time-Series Values with Linear Interpolation (Duplicate Timestamps Allowed) You are given readings from a single sensor as a list of reco...

Coding & Algorithms
6
0
72 people solved
May 13, 2025
Robinhood logo
Robinhood
Medium
Data Scientist

Identify Transactions During 'Golden' Membership Period

transaction +-----------+---------+------------+---------+ | trans_id | user_id | trans_date | amount | +-----------+---------+------------+--------...

Data Manipulation (SQL/Python)
75
0
200 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Product Manager

Product plan for catching and limiting deepfake misinformation on TikTok

Deepfake videos keep getting more convincing. As a product manager at TikTok, how would you use AI to detect deepfakes used for misinformation and sto...

Product Design & StrategyTrust & SafetyAI Product Management
1
0
14 people solved
Aug 21, 2026
Amazon logo
Amazon
Medium
Applied ScientistSenior+

Describe a decision with incomplete information

Describe a decision with incomplete information Behavioral: Decision-Making Without Complete Information (Machine Learning Engineer) Provide a specifi...

Behavioral & Leadership
10
0
127 people solved
Jul 31, 2025
Box logo
Box
Medium
Software Engineer

Diagnose failures via SSH and large logs

Diagnose failures via SSH and large logs Troubleshooting Large Logs Over SSH and Designing Centralized Logging Context You are on-call for a productio...

System DesignDebuggingObservability
16
0
194 people solved
Aug 1, 2025
TikTok logo
TikTok
Medium
Software Engineer

Compute length of longest increasing subsequence

You are given an integer array nums of length n. A subsequence of nums is a sequence that can be derived from nums by deleting zero or more elements w...

Coding & AlgorithmsDynamic ProgrammingBinary Search
14
0
137 people solved
Dec 10, 2025
TikTok logo
TikTok
Hard
Machine Learning Engineer

Design LLM-enhanced recommendation solutions

Design LLM-enhanced recommendation solutions System Design: Incorporating Large Language Models (LLMs) into a Large-Scale Recommendation System Contex...

ML System Design
7
0
106 people solved
Aug 8, 2025
Capital One logo
Capital One
Easy
Data ScientistSenior+ Locked

Build House Price Model Responsibly

This question evaluates a data scientist's competencies in end-to-end supervised learning pipeline design—covering train/validation/test strategy, tar...

Machine LearningSupervised LearningFairness & Bias
9
0
163 people solved
Feb 28, 2026
Capital One logo
Capital One
Medium
Product Manager

Building Real-Time Spend Controls for Capital One Virtual Debit Cards

You are a product manager at Capital One, where customers can create virtual debit cards. What technical components would the bank need so that custom...

System DesignTechnical Tradeoffs for PMsPayments & Ledgers
2
0
15 people solved
Apr 8, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design ChatGPT homepage with streaming choices

Design ChatGPT homepage with streaming choices System Design: ChatGPT‑Style Homepage with Streaming Goal Design a ChatGPT‑style web homepage end to en...

ML System DesignReal-Time SystemsAPI Integration & HTTP Clients
14
0
172 people solved
Jul 27, 2025
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Compute effective permissions on DAG and prune tree

This set of problems evaluates proficiency in graph and tree algorithms, specifically transitive state propagation and conflict resolution on a DAG (e...

Coding & AlgorithmsGraphsTrees
31
0
303 people solved
Feb 12, 2026
Uber logo
Uber
Medium
Data Scientist

Write SQL for fares and age-band counts

You have two tables. Schema: - drivers(driver_id VARCHAR PRIMARY KEY, name VARCHAR, date_of_birth DATE) - trips(trip_id VARCHAR PRIMARY KEY, driver_id...

Data Manipulation (SQL/Python)SQL
6
1
68 people solved
Oct 13, 2025
Apple logo
Apple
Medium
Product Manager

Apple Maps strategy to win back usage from rival navigation apps

In a product manager interview, you are asked to act as the product manager for Apple Maps. Apple Maps has lost ground to rival mapping apps, and your...

Product Design & StrategyProduct StrategyMarket & Competitive Analysis
1
0
12 people solved
Jul 4, 2026
Stripe logo
Stripe
Medium
Data Scientist

Describe a high-impact project via STAR

Using STAR, walk me through one project you led that measurably changed a core business metric. Include: Situation (company, product, date range), Tas...

Behavioral & Leadership
7
0
65 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a crossword puzzle solver system

This question evaluates algorithm design, constraint solving, efficient lookup data structures, and system scalability for handling large dictionaries...

System DesignBacktracking & RecursionString Algorithms
56
0
425 people solved
Feb 11, 2026
DoorDash logo
DoorDash
Hard
Analytics Engineer

Compute Fitness App DAU

You are working on a fitness app. The schema is: users(user_id BIGINT, signup_ts TIMESTAMP, timezone VARCHAR, is_test_user BOOLEAN) and app_events(eve...

Data Manipulation (SQL/Python)SQL
16
1
167 people solved
Oct 12, 2025
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