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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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 Locked

Identify latent group-call demand from behavior

This question evaluates a data scientist's ability to design measurable product-analytics signals, infer latent user demand from event-level messaging...

Analytics & Experimentation
3
0
25 people solved
Oct 13, 2025
Thumbtack logo
Thumbtack
Hard
Data Scientist Locked

Build a defensible ML pipeline end-to-end

This question evaluates a data scientist's competence in designing and defending an end-to-end production ML pipeline for mixed tabular data, assessin...

Machine Learning
5
0
67 people solved
Oct 13, 2025
Hard
Data Scientist Locked

Design a hybrid marketplace fraud system

This question evaluates competency in designing hybrid fraud detection systems, covering feature engineering across text, image, graph and telemetry s...

Machine Learning
3
0
45 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Data ScientistSenior+ Locked

Design fraud detection across channels with unknowns

This question evaluates a data scientist's competence in designing and operationalizing multi-channel fraud detection systems, covering cost-sensitive...

Machine Learning
7
0
60 people solved
Oct 13, 2025
PayPal logo
PayPal
Hard
Data Scientist Locked

Build a real-time ATO model

This question evaluates a candidate's competency in designing low-latency, production-grade real-time machine learning systems for account-takeover de...

Machine Learning
7
0
67 people solved
Oct 13, 2025
Capital One logo
Capital One
Easy
Data Scientist Locked

Calculate Year-1 profit margin

This question evaluates a candidate's ability to perform applied financial math, including profit margin calculation, classification of costs into fix...

Statistics & Math
5
0
47 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist Locked

Decide whether to sell both products

This question evaluates a data scientist's ability to perform quantitative product‑mix and profitability analysis—covering contribution-margin calcula...

Analytics & Experimentation
5
0
37 people solved
Oct 13, 2025
Upstart logo
Upstart
Medium
Data Scientist Locked

Interpret A/B results with p-values and uncertainty

This question evaluates proficiency in statistical inference for A/B testing, covering confidence intervals, p-values, multiple-testing correction (Be...

Statistics & MathExperiment Analysis & ReadoutHypothesis Testing
6
0
126 people solved
Oct 13, 2025
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
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
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
Meta logo
Meta
Easy
Data Scientist Locked

Determine if users need a new feature

This question evaluates a data scientist's competency in product analytics, causal inference, experiment design, metric definition, instrumentation, a...

Analytics & Experimentation
2
0
34 people solved
Oct 11, 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
34 people solved
Oct 5, 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
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
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