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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
DoorDash logo
DoorDash
Easy
Data Scientist Locked

How would you test a bike delivery option?

This question evaluates experimental design, causal inference, metrics definition, and marketplace analytics competencies in the context of launching ...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
14
0
170 people solved
Feb 12, 2026
Amazon logo
Amazon
Medium
Data Scientist

Identify Top Spenders and Segment Customers Using Python

orders +----------+---------+------------+----------+--------------+-------------------+ | order_id | cust_id | order_date | product | order_amount |...

Data Manipulation (SQL/Python)
78
0
28 people solved
Jul 12, 2025
Google logo
Google
Hard
Software Engineer

Design an elevator control system

Elevator Control System Design (N floors, M elevators) Context You are designing a multi-elevator control system for a building with N floors (1..N) a...

System DesignLow-Level Design (OOP)Simulation & State Machines
22
0
160 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Easy
Software Engineer

Describe a Favorite Project and Its Hardest Technical Challenge

Describe a Favorite Project and Its Hardest Technical Challenge Prompt Tell me about a project you are especially proud of or enjoyed working on. Expl...

Behavioral & Leadership
1
0
20 people solved
Apr 17, 2026
Discord logo
Discord
Hard
Software Engineer

Explain C++ alignment and ABI stability

You are interviewing for a senior C++ / systems role. The interviewer asks two low-level fundamentals questions: 1. C++ memory alignment and padding ...

Software Engineering FundamentalsMemory ManagementProgramming Languages
12
0
93 people solved
Dec 8, 2025
Capital One logo
Capital One
Medium
Data Scientist

Explain Python Virtual Environment Setup and Function Analysis

Scenario Technical screen where candidate and interviewer jointly walk through Python code snippets used in a data-science repository. Question Show h...

Coding & Algorithms
58
0
28 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Engineer

Compute reservation diff for largest member

Given copies(copy_id, reserved_by_member_id) and members(member_id, referred_by_member_id), find the member with the largest member_id. Return a singl...

Data Manipulation (SQL/Python)
2
0
21 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Solve classic LeetCode problems

Question LeetCode 215. Kth Largest Element in an Array LeetCode 249. Group Shifted Strings Variant of LeetCode 56. Merge Intervals extended to 2-D rec...

Coding & Algorithms
9
0
59 people solved
Jul 29, 2025
TikTok logo
TikTok
Medium
Software Engineer

Answer core CS fundamentals concisely

Answer core CS fundamentals concisely Answer core CS fundamentals: differentiate processes vs. threads; describe how a thread pool works (task queue, ...

Software Engineering FundamentalsConcurrencyOperating Systems
11
0
80 people solved
Jul 17, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Implement nested object path lookup

This question evaluates parsing and traversal of nested maps and arrays, robust error handling for missing keys and out-of-bounds indices, and reasoni...

Coding & Algorithms
5
0
54 people solved
Oct 31, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Explain Causal-Inference Techniques in Your Machine Learning Project

Explain Causal-Inference Techniques in Your Machine Learning Project Technical Deep-Dive: ML Project With Causal Inference Prompt Walk me through one ...

Machine Learning
16
0
96 people solved
Aug 4, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Implement iterators and write tests in Java

Implement iterators and write tests in Java In Java, write everything from scratch (no IDE scaffolding): 1) Define a generic Iterator<T> interface wit...

Coding & AlgorithmsProgramming LanguagesLow-Level Design (OOP)
11
0
133 people solved
Jul 31, 2025
Disney logo
Disney
Hard
Software Engineer

Design a personalized recommendation system

System Design: Personalized Recommendations for a Consumer App Context Assume you are building the home-feed recommendations for a large consumer app ...

ML System DesignSystem Design FundamentalsRecommendation Systems
7
0
121 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Overcome an Obstacle That Threatens Delivery

Question Describe a significant obstacle that threatened a goal you owned. How did you determine the real constraint, change the plan, and keep people...

Behavioral & Leadership
1
0
26 people solved
Mar 12, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Design a dynamic rental pricing system

System Design: ML-Driven Nightly Pricing for Short-Term Rentals Context Design a production ML system that recommends (and optionally auto-sets) night...

ML System DesignExperiment Design (A/B Testing)Feature Engineering
18
0
177 people solved
Aug 12, 2025
Voleon logo
Voleon
Medium
Data Scientist Locked

Diagnose and interpret regression assumptions

This question evaluates proficiency in regression diagnostics and model selection for count outcomes, including OLS assumption checks, log-transformat...

Statistics & MathRegression & Statistical ModelingHypothesis Testing
39
0
406 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Implement sliding-window moving average

Design a class MovingAverage that supports a constructor MovingAverage(k) and a method next(val) returning the average of the last k values from a dat...

Coding & Algorithms
6
2
58 people solved
Jul 31, 2025
Amazon logo
Amazon
Medium
Technical Program ManagerSenior+

Answer Amazon leadership behaviorals

In an Amazon L6 Senior Program Manager interview, candidates may be asked several Leadership Principles-style behavioral questions. Prepare senior-lev...

Behavioral & LeadershipLeadership & InfluenceConflict & Collaboration
17
0
174 people solved
Sep 7, 2024
Uber logo
Uber
Hard
Data Scientist

Design an Uber A/B experiment end-to-end

Experiment Design: Pickup ETA Card Redesign Context: After a rider requests a trip, the app shows a pickup ETA card. The hypothesis is that clearer ET...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
31
0
293 people solved
Oct 13, 2025
Instacart logo
Instacart
Medium
Software Engineer Locked

Implement multiple coding round problems

This multi-part question evaluates algorithmic problem-solving skills including efficient lookup/search, stable ordering and priority management, stre...

Coding & AlgorithmsParsing & InterpretersBinary Search
20
0
206 people solved
Jan 1, 2026
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