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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
Meta logo
Meta
Hard
Data Scientist

Increase posts receiving comments via experimentation

Increase the Share of Posts That Receive a Meaningful Comment You are a data scientist for a consumer social app with posts and comments. Your goal is...

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

Decide whether to renew or sell a TV series

Decide whether a streaming company should renew an existing series for two years or sell it, weighing it against a new show using given profit figures...

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

Define success metrics beyond time spent

This question evaluates a data scientist's competency in product analytics and experimentation, focusing on metrics design, cohort-based retention mea...

Analytics & Experimentation
2
0
25 people solved
Oct 13, 2025
Uber logo
Uber
Hard
Data Scientist

Model waiting-time abandonment via survival

Survival Modeling of Rider Abandonment During Pickup Waits Context You are modeling when a rider cancels (abandons) while waiting for pickup. Let time...

Statistics & MathRegression & Statistical Modeling
6
0
98 people solved
Oct 13, 2025
TikTok logo
TikTok
Hard
Data Scientist Locked

Prove conversion ads value via incrementality

This question evaluates a candidate's competency in causal inference and experimentation design for advertising measurement, covering metrics and attr...

Analytics & Experimentation
2
0
55 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Hard
Data Scientist Locked

Evaluate and test a Top Dasher program

This question evaluates skills in causal inference, experiment design under interference, decision framework development, anti-gaming and selection-bi...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
19
0
136 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Design experiments and observational alternatives

This question evaluates causal inference, experimental design, metric definition and measurement, power analysis, segmentation, and observational stud...

Analytics & Experimentation
2
0
33 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Design a small-sample launch experiment in Europe

Launch Test Design: Early-Access EU Businesses Context You have an early-access pool of 1,200 EU businesses for a new chat subscription offering. Chat...

Analytics & Experimentation
4
0
33 people solved
Oct 13, 2025
TikTok logo
TikTok
Hard
Data Scientist Locked

Causally measure traffic reduction effectiveness

This question evaluates skills in causal inference and quasi-experimental design, including specifying estimands, choosing RD and staggered DiD approa...

Analytics & Experimentation
3
0
44 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Estimate first selection round with/without replacement

This question evaluates understanding of probability and expectation concepts, specifically sampling with and without replacement, per-round success p...

Statistics & Math
2
0
45 people solved
Oct 13, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist Locked

Optimize red-ball draw probability, prove optimality

This question evaluates probabilistic reasoning, optimization and mathematical proof skills by asking how to allocate red and blue balls across two bo...

Statistics & Math
8
0
79 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Evaluate fraud classifier with cost-sensitive metrics

Binary Fraud Classifier: Metrics, Thresholding, Calibration, and Online Evaluation You inherit a binary fraud classifier used to decide whether to blo...

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

Measure notification impact and set guardrails

This question evaluates causal inference, experiment design, metric specification and attribution, statistical power calculation, and long-term monito...

Analytics & Experimentation
2
0
22 people solved
Oct 13, 2025
CVS Health logo
CVS Health
Medium
Data Scientist

Create Views, Insert, and Update Correctly

Treat “today” as 2025-09-01. Use the schema and sample data below to write SQL for each part. Schema: customers(cust_id INT PRIMARY KEY, name TEXT, re...

Data Manipulation (SQL/Python)
2
0
17 people solved
Oct 13, 2025
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
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
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