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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
Snapchat logo
Snapchat
Medium
Data Scientist

Design A/B Tests for Banner Ad and Group-Story Feature

Design A/B Tests for a Banner Ad and a Group-Story Feature You are evaluating two product decisions in a consumer social app: adding a new banner ad p...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
58
0
204 people solved
Jul 12, 2025
TikTok logo
TikTok
Medium
Machine Learning Engineer

Differentiate virtual and pure virtual functions

Differentiate virtual and pure virtual functions In C++, what is the difference between a virtual function and a pure virtual function? Provide syntax...

Coding & Algorithms
7
0
58 people solved
Aug 8, 2025
Google logo
Google
Medium
Product Manager

Market-Sizing Estimate for Tax-Filing Software in the United States

Estimate the size of the market for income tax software in the United States. Walk the interviewer through the structure of your estimate, the assumpt...

Product / Decision MakingEstimation & Market Sizing
0
0
5 people solved
Oct 9, 2024
Meta logo
Meta
Medium
Data Scientist

Design "Restaurants You May Know" Recommendation Algorithm

Design "Restaurants You May Know" Recommendation Algorithm A food-delivery app wants to launch a personalized home-page module called "Restaurants You...

Analytics & Experimentation
42
0
172 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Find posts with >60s unconnected viewing time

Context You work on a social app where users can view posts. A view can be from a connected user (viewer is friends/connected with the post author) or...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
4
1
75 people solved
Jul 28, 2025
Amazon logo
Amazon
Medium
Software Engineer

Demonstrate Amazon leadership principles

Demonstrate Amazon leadership principles Behavioral & Leadership Interview (Software Engineer — Onsite) Provide STAR-structured answers (Situation, Ta...

Behavioral & Leadership
7
0
50 people solved
Aug 4, 2025
S
Sunrise
Easy
Software Engineer

Solve common data-structure and puzzle problems

Solve common data-structure and puzzle problems Solve the following independent problems (language of your choice; assume typical 32/64-bit constraint...

Coding & Algorithms
4
0
59 people solved
Jul 21, 2025
Amazon logo
Amazon
Medium
Data Scientist

Coordinate Resources and Resolve Conflicts for Project Success

Coordinate Resources and Resolve Conflicts for Project Success Cross-Functional Leadership: Coordination, Conflict Resolution, Influence, and Bottlene...

Behavioral & Leadership
25
0
105 people solved
Aug 4, 2025
Jefferies logo
Jefferies
Easy
Data Scientist

How to compute correlation from variances

Statistics Prompt: Compute Correlation from Variances You have two random variables \(X\) and \(Y\). You are told: - \(\mathrm{Var}(X+Y)\) - \(\mathrm...

Statistics & Math
9
0
64 people solved
Jul 3, 2025
Amazon logo
Amazon
Medium
Product Manager

Behavioral: Receiving Blunt Criticism of Your Work and What You Changed

Describe a specific time when someone gave you harsh, critical feedback about your work. What was the feedback, how did you react when you first heard...

Behavioral & LeadershipConflict & CollaborationFailure & Learning
0
0
6 people solved
Jul 27, 2025
Amazon logo
Amazon
Medium
Data Scientist

Analyze User Engagement with SQL Queries

events +----------+---------+---------------------+ | event_id | user_id | event_time | +----------+---------+---------------------+ | 1 ...

Data Manipulation (SQL/Python)
107
0
302 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Leverage Data Sources for Effective Push Notification Strategy

Data Sources and Metrics for Push Notification Strategy A product team wants to improve the quality and impact of mobile push notifications for a cons...

Analytics & Experimentation
9
0
54 people solved
Jul 12, 2025
Meta logo
Meta
Easy
Data Scientist

Calculate Expected Impressions and Probability for Users

Expected Impressions From Random Ad Allocation There are X distinct users and Y ad impressions. Each impression is assigned independently and uniforml...

Statistics & Math
18
0
81 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Product Manager

Facebook News Feed Photo Density: Finding the Optimal Amount with Metrics and Experiments

Facebook's News Feed shows a mix of content types. As the product manager, you are asked to work out the right number of photos to show in the feed. E...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
0
0
4 people solved
Nov 7, 2024
Meta logo
Meta
Medium
Data Scientist

Annotating and forecasting a long‑tail distribution

Annotating and Forecasting a Long-tail Distribution You are analyzing daily share counts across many pages on a social platform. The cross-sectional d...

Statistics & Math
25
0
67 people solved
Jul 12, 2025
Gopuff logo
Gopuff
Easy
Machine Learning Engineer

Explain SHAP, Word2vec, Random Forests, Normalization, and Transformers

Explain the following machine learning fundamentals. Use definitions, mechanisms, and small conceptual examples; no dataset or company-specific applic...

Machine LearningML FundamentalsModel Interpretability
1
0
23 people solved
Mar 18, 2024
Amazon logo
Amazon
Medium
Data Scientist

Implement Reservoir Sampling; Analyze Time and Space Complexity

Scenario Process an unbounded stream of user IDs and maintain a uniform random sample of k users in memory. Question Implement reservoir sampling for ...

Coding & Algorithms
25
0
86 people solved
Aug 4, 2025
Nextdoor logo
Nextdoor
Hard
Software Engineer

Build and evaluate a Colab classification model

Build and evaluate a Colab classification model End-to-End Tabular Classification Workflow in Google Colab You are asked to design and implement a com...

Machine Learning
13
0
92 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Data ScientistNew Grad

Describe Overcoming a Major Challenge in Your Career

Describe Overcoming a Major Challenge in Your Career This is a behavioral deep-dive for a new-grad data scientist role. The interviewer may ask severa...

Behavioral & Leadership
97
0
258 people solved
Jul 12, 2025
Google logo
Google
Medium
Product Manager

Market-Sizing Estimate: Rain-Driven Umbrella Purchases in One City

Estimate the number of umbrellas that people in a city buy because of rain. Explain how you break the problem down, state each assumption as you make ...

Product / Decision MakingEstimation & Market Sizing
0
0
6 people solved
Jul 31, 2025
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