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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
Medium
Data Scientist

Generate Weekly Revenue and Engagement Summary with Pandas

events | user_id | event_time | event_type | platform | revenue | |---------|---------------------|------------|----------|---------| | 101 ...

Data Manipulation (SQL/Python)Pandas & Python DataSQL
63
0
117 people solved
Jul 12, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Build a leak-free sklearn churn pipeline

Take‑Home ML Task: Reproducible Subscription Classification Pipeline You are given a daily user-level dataset and must build a reproducible Python (sc...

Machine LearningML CodingModel Evaluation
16
0
124 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Product Manager

Personal Motivation and Cultural Fit

Behavioral PM Onsite: Global Mindset, Project Selection, and Motivation You are interviewing for a Product Manager role on a global short-video or soc...

Behavioral & LeadershipMotivation & FitPrioritization & Tradeoffs
21
0
131 people solved
Jul 4, 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
11 people solved
Apr 30, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Solve linked list, grid BFS, and median queries

This multi-part question evaluates proficiency in in-place linked list manipulation, reasoning about shortest connections between connected components...

Coding & AlgorithmsLinked ListsGrids & Matrices
28
0
337 people solved
Jan 22, 2026
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Implement a resumable data loader

This question evaluates a candidate's ability to design stateful, resumable data iteration with deterministic shuffling and compact serializable check...

Coding & Algorithms
6
0
69 people solved
Feb 11, 2026
HubSpot logo
HubSpot
Easy
Software Engineer

Design an hourly weather crawling service

Scenario Design a service that crawls the U.S. National Weather Service (or a similar public provider) and provides hourly weather data to internal co...

System DesignETL & Data PipelinesAPI Integration & HTTP Clients
24
0
174 people solved
Dec 15, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design an online ads serving system

System Design: Low-Latency Targeted Ad Serving (≤100 ms E2E) You are designing an online advertising serving system for web/app inventory with a stric...

System DesignAds SystemsSystem Design Fundamentals
40
0
329 people solved
Sep 6, 2025
Imc logo
Imc
Medium
Data Scientist Locked

Solve a constrained problem using KKT conditions

This question evaluates understanding of constrained optimization using Karush–Kuhn–Tucker (KKT) conditions, including Lagrangian formulation, station...

Machine Learning
5
0
77 people solved
Jan 14, 2026
Airwallex logo
Airwallex
Medium
Data Scientist

Investigate Harassment Surge and Mitigation

Question You work on content integrity. Your monthly moderation analysis shows that the Harassment violation type increased sharply in the most recent...

Analytics & Experimentation
10
0
85 people solved
Nov 14, 2025
Meta logo
Meta
Hard
Data Scientist

Track Success and Guardrail Metrics for Push Notifications

Track Success and Guardrail Metrics for Push Notifications You are designing and evaluating a new push-notification feature for a travel-recommendatio...

Analytics & Experimentation
95
0
402 people solved
Jul 12, 2025
Google logo
Google
Hard
Machine Learning Engineer

Explain transformer architecture and variants

Technical Screen: Explain the Transformer Architecture Scope Provide a structured deep-dive into Transformers. Your explanation should cover theory, s...

Machine LearningTransformers & AttentionNeural Networks & Training
32
0
224 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Data Scientist

Clean, split, merge, and aggregate with pandas

Given two CSVs, use pandas to clean, split strings, merge, and aggregate. drivers.csv driver_id,name,signup_city D1,Jane Doe,SF D2,Mark S,NYC D3,A...

Data Manipulation (SQL/Python)
2
0
20 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a scalable parking lot system

Design a scalable parking lot system System Design: Multi-Level Parking Lot Service Context Design a production-grade parking lot system for a large, ...

System DesignSystem Design FundamentalsLow-Level Design (OOP)
17
0
128 people solved
Jul 16, 2025
Apple logo
Apple
Medium
Software Engineer

Optimize QA Benchmarks and Shared HPC Usage

A Software QA workflow runs benchmarks on shared high-performance computing (HPC) resources. How would you reduce resource usage and shorten turnaroun...

Software Engineering FundamentalsTesting & QualityJob Scheduling & Workflows
0
0
11 people solved
Mar 27, 2026
Microsoft logo
Microsoft
Easy
Data Engineer

Design a scalable URL shortener

Design a highly scalable URL shortening service, similar to Bitly or TinyURL. The service converts long URLs into short links and redirects short-code...

System DesignSystem Design FundamentalsCaching
27
0
188 people solved
Jan 22, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Merge and Concatenate Inconsistent Order Files with Pandas

orders_2023 +----------+-------------+--------+ | order_id | customer_id | amount | +----------+-------------+--------+ | 101 | C001 | 120...

Data Manipulation (SQL/Python)
3
0
36 people solved
Aug 4, 2025
Roblox logo
Roblox
Hard
Data Scientist

Apply Bayes' rule to compute posterior

A binary event \(A\) (e.g., “user is a payer” or “patient has a disease”) has prior probability \(P(A)\). You observe evidence \(B\) (e.g., a model pr...

Statistics & MathProbabilityBayesian Statistics
8
0
109 people solved
Nov 24, 2025
Flatiron Health logo
Flatiron Health
Medium
Data Scientist

Compute churn metrics and rank top students

You have two tasks. Part A (R): You receive a Customers CSV with columns: id (INT), signup_date (YYYY-MM-DD), last_active_date (YYYY-MM-DD), churned (...

Data Manipulation (SQL/Python)
2
0
21 people solved
Oct 13, 2025
Gusto logo
Gusto
Medium
Data Scientist Locked

Define Churn and Design Onboarding Experiment

This question evaluates the ability to define and operationalize churn metrics and design rigorous controlled experiments for onboarding flows, includ...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
11
0
91 people solved
May 29, 2026
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