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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
Data ScientistSenior+

Implement Fibonacci with efficiency constraints

Write a function fib(n) that returns the nth Fibonacci number (0-indexed: fib(0)=0, fib(1)=1). Requirements: - Handle n up to at least 10^6. - Discuss...

Coding & Algorithms
14
2
128 people solved
Nov 24, 2025
LinkedIn logo
LinkedIn
Easy
Data Scientist

Do US members upload more videos than non-US?

You suspect video posting adoption differs between US and international members. Tables members - memberid INT (PK) - country VARCHAR (e.g., 'usa', '...

Analytics & ExperimentationMetrics & KPIsSegmentation & Cohort Analysis
11
0
106 people solved
Feb 1, 2026
Amazon logo
Amazon
Medium
Data Scientist

Diagnose MySQL joins and GROUP BY/HAVING errors

You are using MySQL 8.0 with ONLY_FULL_GROUP_BY enabled. Answer all parts precisely. Provide the exact SQL you would run and the final result shapes/v...

Data Manipulation (SQL/Python)
1
0
29 people solved
Oct 13, 2025
Amazon logo
AmazonBloomberg
Medium
Software Engineer

Minimum Adjacent Row Swaps for Zeros Above the Diagonal

Problem You may swap only neighboring rows of the square binary grid. A valid arrangement has 0 in every cell strictly above the main diagonal. Return...

Coding & AlgorithmsGreedyGrids & Matrices
0
0
8 people solved
Squarepoint logo
Squarepoint
Medium
Data Scientist

Compute drawdown, profit, and coin change

Question What is the maximum drawdown of a cumulative PnL (profit and loss) series, and when did it occur? Implement a function mdd(pnl) that returns ...

Coding & AlgorithmsArrays & StringsDynamic Programming
13
0
114 people solved
Aug 4, 2025
Citadel logo
Citadel
Hard
Data Scientist Locked

Solve Classic Probability Questions

This set evaluates probabilistic reasoning and expectation computation across topics such as sequential conditional survival, convolution of continuou...

Statistics & MathProbabilityPuzzles & Brainteasers
31
0
238 people solved
Feb 21, 2026
Meta logo
Meta
Hard
Software Engineer

Design a Dropbox-like file storage and sync service

Design a Dropbox-like file storage and sync service Design a cloud file storage and synchronization service like Dropbox / Google Drive. The system sh...

System Design
16
0
129 people solved
Jul 15, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design enterprise RAG search system

Design enterprise RAG search system Design an End-to-End Enterprise RAG Search System Background You are tasked with designing a Retrieval-Augmented G...

ML System DesignRetrieval-Augmented GenerationLLM Applications
20
0
289 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write SQL to quantify outage revenue loss

A database outage blocked premium membership registrations from 2025-01-01 to 2025-03-31 (inclusive). Members intend to start on intended_start_date, ...

Data Manipulation (SQL/Python)
1
0
33 people solved
Oct 13, 2025
Google logo
Google
Medium
Product Manager

Google Strategy: The Business Rationale Behind Creating Chrome or Android

Google builds both Chrome and Android. Pick one of the two and explain why Google decided to create it. Some interviewers skip the choice and name the...

Product Design & StrategyProduct StrategyMarket & Competitive Analysis
0
0
4 people solved
Aug 29, 2026
Apple logo
Apple
Medium
Software EngineerNew Grad

Explain Java Constructors and the super Keyword

What is a constructor in Java, how does it differ from a method, and when would you use super? What a Strong Answer Covers Explain object initializati...

Software Engineering FundamentalsProgramming Languages
0
0
10 people solved
Mar 14, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Data ScientistSenior+

Explain Core ML Concepts

You are interviewing for a senior AI/ML-oriented Data Scientist role at a financial institution (J.P. Morgan). This is the "ML fundamentals" portion o...

Machine LearningML FundamentalsSupervised Learning
33
0
241 people solved
Apr 24, 2026
Google logo
Google
Medium
Software Engineer Locked

Sliding Window Average After Dropping the Largest Values

Compute one average per fixed-size sliding window after removing exactly the largest k values, counting duplicates separately. Support negative number...

Coding & AlgorithmsTwo Pointers & Sliding WindowHeaps & Priority Queues
29
1
233 people solved
May 23, 2026
Meta logo
Meta
Medium
Data Engineer

Recommend friends-of-friends

Question Given a dictionary such as {A:[B,C], B:[C,D], C:[E]}, return for a user U all people followed by U’s followees but not already followed by U....

Coding & Algorithms
6
1
123 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Design a fitness tracking app

This question evaluates a candidate's competency in designing end-to-end backend architectures, specifying core APIs, modeling workout and geospatial ...

System Design
9
0
75 people solved
Mar 12, 2026
Atlassian logo
Atlassian
Medium
Data Scientist

Train and evaluate logistic model with regularization

Binary Classification with Logistic Regression and Regularization Data - Two CSVs: a training set x and a test set x_test. - Each has 7 columns: - C...

Machine Learning
7
0
104 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Machine Learning Engineer

Design LinkedIn Learning course recommendations

Design a mini ML system to recommend LinkedIn Learning courses to a user. Product goal: - Recommend courses that help the user succeed in their job se...

ML System Design
14
0
127 people solved
Feb 18, 2026
Moloco logo
Moloco
Easy
Data ScientistIntern

Why Join Moloco: Your Career Aspirations and Goals

Why Join Moloco: Your Career Aspirations and Goals Behavioral: Motivation and Role Fit (HR/Phone Screen) Context You are interviewing for a Data Scien...

Behavioral & LeadershipMotivation & Fit
6
0
133 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Applied Scientist

Implement decoder-only GPT-style transformer

Goal Implement a simplified decoder-only Transformer language model (similar in spirit to GPT) for next-token prediction. The implementation should be...

Coding & AlgorithmsTransformers & AttentionML Coding
29
0
259 people solved
Nov 18, 2025
Uber logo
Uber
Medium
Machine Learning Engineer

Design a restaurant recommendation system

Question Design a restaurant recommendation system for a food delivery marketplace such as Uber Eats. When a user opens the home page, the system shou...

ML System DesignRecommendation SystemsRanking Models
42
0
410 people solved
Dec 15, 2025
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