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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
Roku logo
Roku
Medium
Backend Engineer Locked

Explain concurrency and distributed fundamentals

This question evaluates understanding of concurrency and synchronization in multithreaded Java, Java hashing and equals/hashCode semantics, garbage co...

Software Engineering FundamentalsConcurrencyMemory Management
11
0
99 people solved
Feb 25, 2026
PayPal logo
PayPal
Medium
Data ScientistSenior+ Locked

How would you measure impact?

This question evaluates competency in causal inference and experimental design for production analytics, covering delayed outcomes, interference, conf...

Analytics & Experimentation
5
0
58 people solved
Mar 14, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a scalable image-based social network

This question evaluates a candidate's ability to design large-scale backend architectures, covering distributed systems, storage and media handling, c...

System Design
7
0
65 people solved
Oct 31, 2025
Meta logo
Meta
Medium
Software Engineer

Design a Scalable Post, Feed, and Search Service

Design a Scalable Post, Feed, and Search Service Design a social-post service with three core capabilities: a user can publish a text post, retrieve a...

System Design
1
0
14 people solved
Mar 2, 2026
DRW logo
DRW
Medium
Data Scientist

Compute Markov steady state and expectations

Compute Markov steady state and expectations Probability and Game Theory: Three Sub-questions Context: The exact transition matrix P (for Q1) and the ...

Statistics & MathProbabilityPuzzles & Brainteasers
10
0
96 people solved
Jul 28, 2025
Meta logo
Meta
Medium
Data Scientist

Handle sales pressure with analytical integrity

Interview Scenario: Call Volume vs. Win Rate — Causation vs. Correlation You support Sales as a data scientist. Leadership observed a positive correla...

Behavioral & Leadership
4
0
31 people solved
Oct 13, 2025
Coinbase logo
Coinbase
Hard
Software Engineer

Design real-time exchange data sync system

Design real-time exchange data sync system System Design: Real-Time Multi-Exchange Stock Data Ingestion and Live Web Page Context You are asked to des...

System DesignTrading SystemsData Ingestion & CDC
6
0
121 people solved
Jul 26, 2025
Amazon logo
Amazon
Medium
Data Scientist

Facilitate Effective Collaboration in Tech Data-Science Teams

Facilitate Effective Collaboration in Tech Data-Science Teams Behavioral & Leadership (Data Scientist Onsite) Scenario You are interviewing for a Data...

Behavioral & Leadership
4
0
40 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Handle conflict and time-pressured decision

Describe a time you had to make a high-stakes recommendation under time pressure when key stakeholders disagreed (e.g., ops wants to ramp a change tha...

Behavioral & LeadershipConflict & CollaborationAmbiguity & Decision Making
14
0
103 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Boost Engagement and Purchases in Meta Social Products

Boost Engagement and Purchases in Meta Social Products Meta Social Products: Driving Comments in Facebook Groups and In‑App Purchases on Instagram Con...

Analytics & Experimentation
3
0
37 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Design chat and online chess

This question evaluates a candidate's ability to design large-scale, real-time consumer systems, testing competencies in scalable architecture, data m...

System DesignReal-Time SystemsSystem Design Fundamentals
9
0
81 people solved
Feb 23, 2026
Dropbox logo
Dropbox
Medium
Software Engineer Locked

Design an S3-like Object Store

This question evaluates system design and distributed storage architecture skills, focusing on scalability, durability, metadata versus data separatio...

System Design
4
0
67 people solved
Oct 3, 2025
Twitch logo
Twitch
Medium
Data Scientist

Explain motivation and behavioral principles

Behavioral & Leadership — Data Scientist Technical Screen Instructions Provide specific, first-person examples with quantifiable outcomes and the conc...

Behavioral & Leadership
4
0
46 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Describe a leadership STAR story

Behavioral & Leadership: Protecting Analytical Rigor Under Deadline (STAR) Context: You are interviewing for a Data Scientist role. The interviewer wa...

Behavioral & Leadership
5
0
65 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Data Scientist Locked

Derive paying users over time with churn

This question evaluates the ability to model user conversion and churn with discrete-time recurrence relations, derive closed-form expressions for pay...

Statistics & Math
6
0
82 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Prove source growth is cannibalization, not incremental

Causal Analysis Design: Is Web Growth Incremental or Cannibalization? Background You observe that revenue attributed to creation_source = "web" is hig...

Analytics & Experimentation
4
0
47 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Define Product Metrics: Align Stakeholders, Measure Success, Improve Results

Define Product Metrics: Align Stakeholders, Measure Success, Improve Results Behavioral Question: Defining New Product Metrics Without Clear Guidance ...

Behavioral & Leadership
19
0
105 people solved
Aug 4, 2025
TikTok logo
TikTok
Medium
Data Scientist

Show ownership in ambiguous creator-growth work

Describe a time you owned an ambiguous growth problem for creators end‑to‑end. Pick one project and cover: 1) the exact business goal and why it matte...

Behavioral & Leadership
5
0
54 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Evaluate shopping tab pre- and post-launch

Instagram Shopping Tab — Measuring Off‑App Purchases, Opportunity Sizing, and Launch Readout Context Instagram is planning a new Shopping tab. Users o...

Analytics & Experimentation
6
0
56 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Find Kth Largest and Tree Ancestors

In a technical phone interview, the candidate was asked two coding problems in the same round: 1. K-th largest element in an array Given an unsorte...

Coding & Algorithms
3
0
60 people solved
Feb 22, 2026
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