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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
TikTok logo
TikTok
Medium
Software Engineer Locked

Solve common interview coding problems

This set evaluates algorithmic problem-solving, data structure selection, and time/space complexity analysis across common patterns such as maximum su...

Coding & AlgorithmsDynamic ProgrammingParsing & Interpreters
15
0
122 people solved
Feb 11, 2026
Meta logo
Meta
Medium
Data Scientist

Convince Leadership to Launch Group Chat Feature

Convince Leadership to Launch Group Chat Feature Evaluating a Group Chat / Group Video-Call Feature for Instagram Context You are a Data Scientist ask...

Analytics & Experimentation
8
0
58 people solved
Aug 4, 2025
Freddie Mac logo
Freddie Mac
Medium
Data Scientist

Design SQL cleaning, mapping, dedupe, and keying

Assume PostgreSQL 15. You may choose a different SQL dialect if you clearly state it and adapt syntax accordingly. Schema and small sample data: - Tab...

Data Manipulation (SQL/Python)
2
0
19 people solved
Oct 13, 2025
Zipline logo
Zipline
Medium
Software Engineer

Design a Redundant Railroad Crossing

Design a safe and redundant control system for an at-grade railroad crossing used by road vehicles and pedestrians. The system should detect approachi...

System Design
5
0
57 people solved
Jan 25, 2026
Thumbtack logo
Thumbtack
Hard
Data Scientist

Design streaming new-vs-returning monthly metrics

Streaming design: Monthly NEW vs RETURNING request shares (event-time, with late/out-of-order and duplicates) Context You receive a high-volume event ...

Coding & AlgorithmsBatch & Stream ProcessingData Ingestion & CDC
9
0
89 people solved
Oct 13, 2025
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
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
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
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
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
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
Meta logo
Meta
Medium
Data Scientist

Calculate Ad Insertion Statistics for Two Methods

Ad Insertion Statistics for Two Feed Strategies You are comparing two ways of inserting ads into a 100-post feed. - Option A: Each post independently ...

Statistics & MathProbability
75
0
98 people solved
Jul 12, 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
Uber logo
Uber
Hard
Data Scientist

Design ETA prediction for Uber rides

System Design: Real‑Time Pickup and Drop‑off ETA Prediction Context: You’re designing an end‑to‑end system that predicts pickup and drop‑off ETAs at t...

Machine LearningML System DesignExperiment Design (A/B Testing)
15
0
151 people solved
Oct 13, 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
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Reconstruct DNA from tagged fragments

This question evaluates understanding of sequence reconstruction, graph modeling, and traversal/orientation constraints, focusing on ordering labeled ...

Coding & AlgorithmsGraphs
8
0
144 people solved
Mar 1, 2026
PayPal logo
PayPal
Hard
Machine Learning Engineer

Assess LLMs for fraud detection

LLMs in Fraud Detection: Near-Term vs. Long-Term Roles Context You are designing fraud detection for a large-scale digital payments platform with: - R...

Machine LearningML System DesignLLM Applications
18
0
149 people solved
Sep 6, 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
Character.AI logo
Character.AI
Medium
Software Engineer

Design timestamped key-value map

Question Design a class that supports insert(key, value, timestamp) and get(key, timestamp) where get returns the value whose timestamp is the smalles...

Coding & Algorithms
19
0
60 people solved
Jul 29, 2025
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