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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
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
94
0
399 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Navigate Crises and Sustain Team Morale Under Pressure

Navigate Crises and Sustain Team Morale Under Pressure Behavioral & Leadership — Data Scientist Onsite Scenario You are working as a Data Scientist on...

Behavioral & Leadership
16
0
82 people solved
Aug 4, 2025
Disney logo
Disney
Medium
Data Scientist

Solve matrix add, frequency count, longest consecutive

You are asked to solve the following 3 coding tasks (in any language). Implement each as a function. 1) Add two matrices Input: Two 2D integer arrays ...

Coding & Algorithms
8
0
57 people solved
Sep 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Analyze Monthly Prime vs Non-Prime Sales and Price Buckets

sales +-----------+------------+----------+-------+ | order_id | order_date | is_prime | price | +-----------+------------+----------+-------+ | 1001...

Data Manipulation (SQL/Python)
84
0
278 people solved
Aug 4, 2025
Amazon logo
Amazon
Easy
Applied Scientist

Explain vanishing gradients and activations

Explain the vanishing gradient problem in deep neural networks. In your answer: - Describe how backpropagation works at a high level and why gradients...

Machine Learning
7
0
76 people solved
Dec 8, 2025
Meta logo
Meta
Medium
Data Scientist

Detect and Reduce Spammy Friend Requests Effectively

Detect and Reduce Spammy Friend Requests Effectively Detecting Spammy Friend Requests Context Assume a consumer social platform where users can send f...

Machine Learning
2
0
36 people solved
Aug 4, 2025
Netflix logo
Netflix
Medium
Data Scientist

Justify all-cash compensation expectations and trade-offs

All-Cash Compensation Expectation (Data Scientist — HR Screen) Context You are in an HR screen for a Data Scientist role. Provide a clear, well-resear...

Behavioral & LeadershipMotivation & Fit
12
0
129 people solved
Oct 13, 2025
Optiver logo
Optiver
Medium
Data Scientist

Make Two Apple Piles Equal With Doubling Moves

You have two piles of apples: the first pile contains a apples and the second pile contains b apples. In one move you choose one pile to be the receiv...

Coding & Algorithms
1
0
28 people solved
Mar 21, 2025
CVS Health logo
CVS Health
Hard
Data Scientist

Lead structured response to accuracy incident

Incident Response Plan: Spike in Incorrect Payments for CA Users Aged 18–24 Scenario Since 00:00 today, the share of incorrect payments for users aged...

Behavioral & LeadershipMetric DiagnosticsModel Monitoring & Drift
7
0
108 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Design a Lens Recommendation System

Design a recommendation system for augmented-reality lenses in a social camera application. Your design should cover: - product goals and success metr...

ML System Design
7
0
70 people solved
Jun 28, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Detect cycles and order with DFS

You are given a directed graph of package dependencies represented as an adjacency list: Map<String, List<String>> deps where deps[p] lists packages t...

Coding & Algorithms
6
0
80 people solved
Sep 6, 2025
Splunk logo
Splunk
Medium
Product Manager

Pricing Splunk’s New Service

Pricing Splunk's New B2B Service You are a Product Manager evaluating how to price a new observability or security analytics service for a mid-size te...

Product / Decision Making
13
0
85 people solved
Jul 4, 2025
Citadel logo
Citadel
Medium
Site Reliability Engineer

Solve Five Core Python Data-Processing Exercises

Solve Five Core Python Data-Processing Exercises Implement and explain: repeat a message n times with blank lines; square a list then reverse it; Fizz...

Software Engineering Fundamentals
5
0
36 people solved
May 8, 2026
Upstart logo
Upstart
Easy
Data Scientist

Calculate Particle Survival Probability After Time t

Calculate Particle Survival Probability After Time t Radioactive-Decay Style Probability Context You have 100 identical, independent particles. Each p...

Statistics & MathProbability
8
0
132 people solved
Aug 4, 2025
Fortinet logo
Fortinet
Medium
Software Engineer Locked

Solve linked list reversal and minima problems

This set of problems evaluates proficiency in fundamental data structures and algorithms, specifically linked list manipulation (reversal and linear-t...

Coding & Algorithms
6
0
56 people solved
Jan 6, 2026
Salesforce logo
Salesforce
Hard
Software Engineer

Architect serving and storage for recommender

Architect serving and storage for recommender System Design: Recommendation Service (Serving + Data Infrastructure) Context Design a production-ready ...

System DesignSystem Design FundamentalsCaching
8
0
99 people solved
Aug 1, 2025
Meta logo
Meta
Medium
Data Scientist

Design and analyze a group-calls experiment

You are considering launching Group Video Calls. Answer all parts precisely; justify choices with pros/cons and formulas where relevant. 1) Clarify CT...

Analytics & Experimentation
2
0
44 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design feedback and feature rollout platform

Design feedback and feature rollout platform System Design: Feedback + Feature Rollout Platform Context Build a multi-tenant platform that lets produc...

System Design
6
0
70 people solved
Aug 8, 2025
Google logo
Google
Hard
Data Scientist Locked

Diagnose and fix flawed model fit

This question evaluates a data scientist's competency in applied supervised learning diagnostics, including feature encoding, feature scaling, class i...

Machine Learning
9
0
73 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Tell me about exceeding your responsibility

Answer these Amazon-style behavioral interview questions with concrete STAR stories: 1. Tell me about a time you went beyond your formal responsibilit...

Behavioral & Leadership
5
0
67 people solved
Mar 22, 2025
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