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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
Capital One logo
Capital One
Medium
Data Scientist Locked

Assess 3.4M target and design experiments

Assess whether 3.4M paying subscribers is a reasonable target for a new streaming service with 30 original shows at $15 a month, checking market size,...

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

Evaluate and prioritize Facebook Groups

This question evaluates product analytics, experimentation design, causal inference, KPI hierarchy and metric-definition skills, and quantitative prio...

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

Design hashtag recommender with cold start

This question evaluates expertise in recommender-system design, feature engineering, ranking and learning-to-rank models, cold-start strategies, evalu...

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

Handle novelty and residual effects

This question evaluates a data scientist's competency in experiment design and causal inference for online metrics under temporal dynamics, specifical...

Analytics & Experimentation
3
0
30 people solved
Oct 13, 2025
Roku logo
Roku
Medium
Data Scientist

Diagnose coffee-shop profit decline

You run a single-location coffee shop. In August 2025, profit dropped 18% vs July while transactions fell 4% and average check rose 2%. You have these...

Analytics & Experimentation
9
0
63 people solved
Oct 13, 2025
Gemini logo
Gemini
Medium
Data Scientist

Lead a cross-team fraud incident response

Describe a specific time you led a high-severity ACH fraud incident from detection to resolution. Include: (1) the first on-call signal you saw, (2) t...

Behavioral & Leadership
2
0
37 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Choose KPIs for short-video recommendations

This question evaluates a data scientist's ability to define precise product metrics, set guardrails, design and power A/B tests, and apply weighted d...

Analytics & Experimentation
3
0
28 people solved
Oct 13, 2025
Medium
Data Scientist Locked

Diagnose and fix linear regression violations

Work through an OLS model on 10,000 observations: state the Gauss-Markov assumptions, show why residuals are orthogonal to the predictors, and handle ...

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

Increase posts receiving one comment

Define the metric, guardrails, interventions, and a test plan for raising the share of group posts that get at least one comment within 48 hours, then...

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

Set the Group Call participant cap

We must set a maximum participants cap K for Group Calls. You have telemetry at the call level: calls(call_id, start_ts, participants_count, video_on_...

Statistics & Math
2
0
43 people solved
Oct 13, 2025
Snowflake logo
Snowflake
Medium
Data Scientist

Contrast FCF vs NI; choose one statement

An asset-heavy company reports rising net income while free cash flow (FCF) is negative for three straight quarters. a) Explain when and why FCF can b...

Statistics & Math
3
0
48 people solved
Oct 13, 2025
Capital One logo
Capital One
Hard
Data Scientist

Identify and mitigate risks to break-even

Break-even Risk Assessment for the RH Partnership Offer Context You are evaluating a break-even (BE) analysis for a partnership offer with RH (e.g., a...

Analytics & Experimentation
7
0
85 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Measure and mitigate notification spam

Design a measurement plan to decide whether a social app's notification system is healthy or spammy, covering metrics, experiments, rollout and retiri...

Analytics & Experimentation
4
0
35 people solved
Oct 13, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Compare list/dict; parse JSON/CSV at scale

Compare Python list and dict precisely: for append/insert/lookup/update/delete, state average and worst-case time complexity, memory implications, and...

Data Manipulation (SQL/Python)Programming LanguagesData Cleaning & Wrangling
6
0
104 people solved
Oct 13, 2025
Uber logo
Uber
Hard
Data Scientist Locked

Design station experiment with interference and rush-hour spillovers

This question evaluates a data scientist's competency in experimental design and causal inference under interference and non-stationarity, covering sk...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
12
0
100 people solved
Oct 13, 2025
Uber logo
Uber
Hard
Data Scientist Locked

Differentiate Type I vs II errors under costs

This question evaluates understanding of hypothesis testing (Type I/II errors), cost-sensitive decision theory, sample size calculation for proportion...

Statistics & MathExperiment Design (A/B Testing)Hypothesis Testing
13
0
96 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Design and analyze end-to-end A/B test

This question evaluates experimentation design and analysis competencies for A/B testing, including metric selection, statistical interpretation, inte...

Analytics & Experimentation
4
0
31 people solved
Oct 13, 2025
Capital One logo
Capital One
Hard
Data Scientist Locked

Design an experiment for delay drivers

This question evaluates experimental design and causal inference skills — including randomized and quasi-experimental identification, power and sample...

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

Choose between A/B and switchback for spillovers

This question evaluates experimental-design and causal-inference competencies, specifically handling interference and spillovers, defining experimenta...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
10
0
97 people solved
Oct 13, 2025
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
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