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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Lyft logo
Lyft
Easy
Data Scientist

Determine Probability of Single Ride on Following Day

Determine Probability of a Single Ride on the Following Day A pricing experiment gives each new rider two ride opportunities on day 1. For each offere...

Statistics & MathProbability
41
0
162 people solved
Jul 12, 2025
Roblox logo
Roblox
Hard
Machine Learning Engineer

Design a real-time game recommendation system

Design a real-time game recommendation system System Design: Real‑Time Game Recommendation System (Architecture Focus) You are designing a real‑time r...

ML System DesignRecommendation SystemsReal-Time Systems
13
0
228 people solved
Jul 16, 2025
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Software Engineer

Implement 3x3 matrix transforms and rotation

Implement 3x3 matrix transforms and rotation For a 3x3 matrix, write Python code to: (a) transpose it in-place; (b) swap any two rows and any two colu...

Coding & AlgorithmsGrids & Matrices
25
0
192 people solved
Aug 8, 2025
Capital One logo
Capital One
Medium
Data Scientist

Describe Your Most Significant Professional Accomplishment

Behavioral Interview: Most Significant Professional Accomplishment In an onsite behavioral or leadership round for a Data Scientist role, the intervie...

Behavioral & Leadership
11
0
80 people solved
Jul 12, 2025
Chime logo
Chime
Medium
Data Scientist

Navigate Complex Product Challenges in Behavioral Interviews

Navigate Complex Product Challenges in Behavioral Interviews Behavioral & Leadership Phone Screen — Rapid-Fire Prompts Context You are interviewing fo...

Behavioral & LeadershipLeadership & InfluenceAmbiguity & Decision Making
18
0
129 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design REST APIs for JSON file storage

This question evaluates system design and RESTful API skills for building JSON document storage, covering metadata modeling, concurrency control, auth...

System DesignAPI DesignFile & Media Storage
7
0
127 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Software Engineer

Implement sparse vector dot product

Question Design a SparseVector class for vectors of integers in which most entries are zero, and support an efficient dot product between two such vec...

Coding & Algorithms
4
0
68 people solved
Aug 14, 2025
Airbnb logo
Airbnb
Medium
Data Scientist Locked

Build and evaluate an order prediction model

This question evaluates a data scientist's competency in building and evaluating binary classification models with temporal constraints and operationa...

Machine LearningSupervised LearningModel Evaluation
10
0
105 people solved
Oct 13, 2025
Meta logo
Meta
Easy
Product Analyst

Design experiments and diagnose metric changes

You are a Product/Data Scientist at a food-delivery marketplace (customers, dashers/couriers, merchants). Answer the following product analytics & exp...

Analytics & ExperimentationExperiment Design (A/B Testing)
14
0
169 people solved
Feb 22, 2026
Walmart Labs logo
Walmart Labs
Medium
Software Engineer Locked

Answer Spring Boot and Thymeleaf engineering questions

This question evaluates a developer's competency with Spring Boot and Thymeleaf, covering debugging memory and session issues, designing dependency st...

Software Engineering FundamentalsProgramming Languages
7
0
89 people solved
Jan 6, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design file deduplication at scale

Design an algorithm to identify duplicate files in a large directory tree. You are given an iterator over files providing (path, size) and a function ...

Coding & AlgorithmsFile & Media Storage
8
0
116 people solved
Sep 6, 2025
Roblox logo
Roblox
Medium
Software Engineer

Describe feedback, conflict, and missed metrics

Question This Roblox software engineer onsite behavioral round covers three related leadership scenarios. Be ready to answer each with a concrete, str...

Behavioral & LeadershipConflict & CollaborationCommunication & Stakeholders
18
0
184 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Design analysis to test social vs game engagement

Question Hypothesis: Among Oculus (Meta Quest) users, those who use social features are more regularly engaged than those who use game features. Using...

Analytics & Experimentation
8
1
88 people solved
Oct 13, 2025
J.P. Morgan logo
J.P. Morgan
Medium
Software Engineer

Compute ring window max and deletion indices

Part A — Ring window maximum: You are given n computers arranged in a circle, represented by an array of bits (1 = on, 0 = off), and an integer k (1 <...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
11
0
114 people solved
Jul 31, 2025
Capital One logo
Capital One
Medium
Data Scientist

Choose and compute correct t-test

A/B Test: Watch Time per Impression (seconds) You ran an experiment with two independent groups and want to assess whether the new experience increase...

Statistics & Math
2
0
49 people solved
Oct 13, 2025
Mintlify logo
Mintlify
Medium
Software EngineerSenior+

Recreate a Card Interface from a Screenshot

Recreate a Card Interface from a Screenshot Build a frontend component that matches a supplied screenshot of a card containing badges or chips. Explai...

Software Engineering Fundamentals
1
0
12 people solved
Apr 30, 2026
Instacart logo
Instacart
Medium
Data Scientist

Write SQL to rank advertisers and profitability

You are given two denormalized tables. Use ANSI SQL (CTEs allowed) and UNPIVOT (or an equivalent UNION ALL approach if UNPIVOT is unavailable). Table:...

Data Manipulation (SQL/Python)
3
0
30 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Software Engineer

Flatten object & Promise.all

Question Given a nested JavaScript object, write a function to flatten it so that nested keys are converted to a single-level path (e.g., {a:{b:1}} ->...

Coding & Algorithms
21
0
89 people solved
Jul 29, 2025
Amazon logo
Amazon
Medium
Data Scientist

Explain Statistical Outputs to Non-Technical Stakeholders

Explain Statistical Outputs to Non-Technical Stakeholders A/B Test Dashboard Interpretation and Core Statistics Concepts Scenario You are reviewing an...

Statistics & Math
88
0
338 people solved
Aug 4, 2025
DRW logo
DRW
Medium
Machine Learning Engineer

Explain core ML and DL fundamentals

Explain core ML and DL fundamentals Answer the following machine-learning / deep-learning concept questions. Where useful, include the formula, the in...

Machine LearningML FundamentalsNeural Networks & Training
19
0
131 people solved
Jul 31, 2025
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