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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
Hard
Data Scientist Locked

Decide launch with p=0.10 at alpha 0.05

This question evaluates a data scientist's competency in statistical inference and experiment decision-making, including frequentist hypothesis testin...

Statistics & Math
2
0
28 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Data Scientist

Analyze DFS, BFS, and A* trade-offs

Given a weighted graph with nodes {S,A,B,C,D,G} and edges: S–A(2), S–B(5), A–C(2), B–C(1), C–D(2), D–G(1), B–G(20). Heuristic for A*: h(A)=4, h(B)=3, ...

Coding & Algorithms
6
0
91 people solved
Oct 13, 2025
TikTok logo
TikTok
Hard
Data Scientist Locked

Contrast LSTM and Transformer for long sequences

This question evaluates understanding of sequence-model architectures and system-level trade-offs for long-context autoregressive language models, cov...

Machine Learning
4
0
55 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Optimize IG Shopping ranking with multiple objectives

Instagram Shopping: Multi-Objective Ranking With Fairness, Fraud Robustness, and On-Device Constraints You are designing the Instagram Shopping home f...

Machine Learning
3
0
33 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Design a restaurant recommender under cold start

Design a Multi-Objective Restaurant Ranking System You own the restaurant recommendation surface for a city app. The goal is to rank nearby restaurant...

Machine Learning
5
0
61 people solved
Oct 13, 2025
EY logo
EY
Medium
Data Scientist

Walk through end‑to‑end delivery

Walk Through a Program You Led Across the Full Lifecycle (Data Science) Provide a concrete example of one program you personally led or owned end-to-e...

Behavioral & Leadership
4
0
46 people solved
Oct 13, 2025
HBO logo
HBO
Hard
Data Scientist

Explain streaming move and industry tradeoffs

HBO Max Data Scientist — Take‑Home Prompts Context You are applying for a Data Scientist role focused on consumer streaming. Answer the following conc...

Behavioral & Leadership
4
0
45 people solved
Oct 13, 2025
Amazon logo
Amazon
Easy
Data Scientist

Describe a time you solved a complex problem

Behavioral (Leadership/Ownership): Describe a time when you solved a complex problem by digging into details. In your answer, cover: - The context and...

Behavioral & Leadership
5
0
86 people solved
Oct 11, 2025
Atlassian logo
Atlassian
Medium
Product Manager

Propose a New Vending-Machine Product Category and Justify Its Fit and Location

Propose a product, beyond the familiar snacks and drinks, that could be sold through vending machines. Make the case for it: why it suits the vending ...

Product Design & StrategyProduct Sense
1
0
7 people solved
Oct 6, 2025
Gts logo
Gts
Medium
Data Scientist Locked

Compute value of card guessing game

This question evaluates probabilistic reasoning, expected-value computation, sequential decision-making, and the ability to reason about optimal strat...

Machine Learning
4
0
51 people solved
Sep 18, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a risk management ticketing system

Design a Risk Management Ticketing System Context You are designing a ticketing platform used by human users (analysts, managers, admins) and an autom...

System Design
7
0
73 people solved
Sep 6, 2025
Lyft logo
Lyft
Hard
Software Engineer

Design a scalable real-time chat system

System Design: Real-Time Chat (1:1 and Groups) Context Design a mobile-first, globally available real-time chat system that supports both 1:1 and grou...

System DesignReal-Time SystemsConsistency & Availability
18
0
175 people solved
Sep 6, 2025
Bloomberg logo
Bloomberg
Medium
Data Engineer

Implement RotatingFileSink in hierarchy

You are given an existing Python 3.10 codebase with an abstract base class RecordSink (from abc import ABC, abstractmethod) that defines open() -> Non...

Software Engineering FundamentalsLow-Level Design (OOP)Programming Languages
24
1
167 people solved
Sep 6, 2025
TikTok logo
TikTok
Hard
Software Engineer

Define and measure project metrics

Design and Measurement: Metrics, Instrumentation, and Experiment Plan Context (added for clarity) You are shipping "Freshness Boost," a change to the ...

Analytics & Experimentation
5
0
59 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Hard
Software Engineer

Explain conflict resolution and growth

Behavioral & Leadership: Conflict, Mistake, and Project Deep Dive To assess collaboration, ownership, and technical leadership, answer the following t...

Behavioral & LeadershipConflict & CollaborationProject Deep Dive
4
0
91 people solved
Sep 6, 2025
Intercontinental Exchange logo
Intercontinental Exchange
Medium
Data Scientist

Analyze Newton-Raphson Convergence, Choose Sigma, and Derive Vega

Context You are given the market price of a European option and must infer the Black–Scholes implied volatility. This requires solving for the volatil...

Statistics & Math
6
0
51 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Machine Learning Engineer

Describe past impact and conflict handling

Behavioral and Leadership: AI Function Calling End-to-End + Conflict Resolution Context You are interviewing for a Machine Learning Engineer role. The...

Behavioral & LeadershipProject Deep DiveAI Agents
7
0
98 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Explain HTTP verbs, CSS, and accessibility

Frontend Fundamentals: HTTP Methods, CSS Styling, and Accessibility Context You are preparing for a frontend engineering interview question that spans...

Software Engineering Fundamentals
3
0
55 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Define and estimate prevalence of unhealthy users

This question evaluates a data scientist's ability to operationalize an "unhealthy user" metric and compute its prevalence from session duration and d...

Analytics & Experimentation
4
0
46 people solved
Aug 17, 2025
MathWorks logo
MathWorks
Easy
Software Engineer

Compute urn-draw probabilities and expectations

Urn Drawing Probabilities (Without Replacement) You have an urn with 12 balls: 5 red (R) and 7 blue (B). You draw two balls uniformly at random withou...

Statistics & Math
4
0
65 people solved
Aug 10, 2025
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