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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
1
0
24 people solved
Oct 13, 2025
Hard
Data Scientist Locked

Define goals and success metrics for subscriber-only features

This question evaluates a data scientist's competency in product analytics and experimentation, specifically goal selection, success metric definition...

Analytics & Experimentation
1
0
19 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Design metrics and geo A/B for new feature

Marketplace Experiment: Verified Seller Badges Context: You are evaluating a new Marketplace feature, Verified Seller Badges, designed to improve buye...

Analytics & Experimentation
3
0
32 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Measure fake-news interventions under network interference

Experiment Design Under Interference: Warning Label for Suspected Fake-News Reshares Context You are testing a pre-reshare warning label for links sus...

Analytics & Experimentation
6
0
55 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Estimate fake-account prevalence with capture-recapture

This question evaluates a data scientist's competency in capture–recapture estimation, estimation of population size with incomplete detections, stati...

Statistics & Math
4
0
34 people solved
Oct 13, 2025
HBO logo
HBO
Hard
Data Scientist Locked

Choose tests for rare-event A/B analysis

This question evaluates expertise in statistical experiment design for rare binary outcomes, covering hypothesis test selection for low-event-rate pro...

Statistics & Math
3
0
36 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Design and analyze notification pinning experiment

This question evaluates experimental design, causal inference, metric definition and instrumentation, sample size estimation, and analysis skills in t...

Analytics & Experimentation
1
0
30 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Hard
Data Scientist Locked

Design and analyze email deliverability experiment

This question evaluates a data scientist's competency in experimental design, causal inference, sequential testing (frequentist and Bayesian), instrum...

Analytics & Experimentation
7
1
75 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Hard
Data Scientist Locked

Investigate Declining Successful Orders

This question evaluates a data scientist's ability to define and validate metrics, generate and prioritize marketplace hypotheses across customer, del...

Analytics & Experimentation
4
0
33 people solved
Oct 5, 2025
Ziprecruiter logo
Ziprecruiter
Medium
Software Engineer

In-Memory Bank Account System: Create, Deposit, Transfer and Merge Accounts

Implement an in-memory bank account system as a class. The report lists four capabilities: creating accounts, depositing money into an account, transf...

Software Engineering FundamentalsData Structure Design
0
0
0 people solved
Oct 3, 2025
Gts logo
Gts
Medium
Data Scientist Locked

Analyze duplicating data in linear regression

This question evaluates understanding of linear regression theory and statistical inference, specifically how duplicating observations affects OLS coe...

Machine Learning
5
0
37 people solved
Sep 18, 2025
Uber logo
Uber
Hard
Data Scientist Locked

Design promo experiment and explain correlation

This question evaluates causal inference, observational data interpretation, and randomized experiment design skills in a two-sided marketplace contex...

Analytics & Experimentation
7
0
63 people solved
Sep 16, 2025
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Design real-time top-K POI retrieval on maps

Real-Time Top-K POIs in Viewport: System Design Context Design a real-time system for a mobile map that continuously shows the top-K points of interes...

ML System Design
10
0
100 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
43 people solved
Aug 17, 2025
Meta logo
Meta
Hard
Data Scientist Locked

How would you measure shop-ads promotion success?

This question evaluates a data scientist's competency in metrics design, experimental evaluation, and causal inference for ads ranking systems, includ...

Analytics & Experimentation
1
0
31 people solved
Aug 10, 2025
Attentive logo
Attentive
Medium
Data Scientist

Apply Multiple Testing Corrections for Valid Results Analysis

Apply Multiple Testing Corrections for Valid Results Analysis Interpreting 30 Parallel A/B Tests With Mixed Results Context - You ran 30 independent w...

Analytics & Experimentation
81
0
195 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Track Metrics to Measure Push Notification Quality

Track Metrics to Measure Push Notification Quality Scenario A consumer mobile app sends push notifications to drive user engagement. You need to evalu...

Analytics & Experimentation
23
0
51 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Data ScientistSenior+ Locked

Prove high-quality pixels improve ad performance

Prove high-quality pixels improve ad performance evaluates metric design, causal reasoning, experiment setup, diagnostics, SQL/statistical checks, and...

Analytics & Experimentation
2
0
34 people solved
Aug 1, 2025
Uber logo
Uber
Medium
Technical Program ManagerSenior+

Compare Uber Eats and DoorDash

Compare Uber Eats and DoorDash from a product and market strategy perspective. Which platform is better positioned, for which user segments, and why? ...

Product Design & StrategyProduct StrategyMarket & Competitive Analysis
6
0
46 people solved
May 1, 2025
Coinbase logo
Coinbase
Easy
Data ScientistSenior+ Locked

Design experiment and analyze volume drop scenario

Design an activation experiment for first-trade rate and investigate a retail trading volume drop despite higher BTC volatility. The solution covers A...

Analytics & Experimentation
2
0
27 people solved
Feb 6, 2025
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