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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
Medium
Machine Learning Engineer Locked

Design concurrent expiring job registry

This question evaluates understanding of concurrent data structures, synchronization primitives, time-based expiration semantics, and efficient cleanu...

Software Engineering Fundamentals
2
0
29 people solved
Nov 28, 2025
Amazon logo
Amazon
Medium
Applied Scientist Locked

Design logo infringement detection system

This question evaluates a candidate's competency in ML system design for visual search, covering image representation and embeddings, metric learning,...

ML System Design
2
0
56 people solved
Nov 18, 2025
Meta logo
Meta
Easy
Data Scientist Locked

Define hand-waving accuracy and launch decision

This question evaluates a data scientist's ability to define and operationalize detection metrics, design instrumentation and diagnostics, connect mod...

Analytics & Experimentation
4
0
56 people solved
Nov 16, 2025
Meta logo
Meta
Medium
Data Scientist

How to decide if users need a new feature

You are a Data Scientist at a social app. The product team proposes a new in-app feature (e.g., a new sharing surface). You have event-level data and ...

Analytics & Experimentation
3
0
38 people solved
Nov 2, 2025
Meta logo
Meta
Hard
Software Engineer Locked

Design an ad click tracking system

This question evaluates a candidate's ability to architect a high-throughput, reliable ad event tracking system, including event modeling, streaming a...

System Design
2
0
38 people solved
Oct 21, 2025
Meta logo
Meta
Medium
Product Analyst Locked

How to evaluate emoji reactions?

This question evaluates product analytics and experimentation competencies for a Product Analyst role in the Analytics & Experimentation domain, focus...

Analytics & Experimentation
2
0
40 people solved
Oct 20, 2025
Hard
Data Scientist Locked

Derive and regularize logistic regression

This question evaluates proficiency in logistic regression theory and regularization, GLM versus OLS assumptions, class imbalance handling and calibra...

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

Design and validate an ads feed experiment

This question evaluates a data scientist's competency in experiment design, causal inference, and applied statistical analysis for product experimenta...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing
9
0
77 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Validate in-post restaurant recommendations via experiment

This question evaluates a data scientist's competency in experimental design for recommendation systems, including defining viewer- and creator-level ...

Analytics & Experimentation
1
0
26 people solved
Oct 13, 2025
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
Medium
Data Scientist

Write SQL filtering, grouping, CASE, UNION tasks

Use the following schema and sample data to answer all parts. Assume standard ANSI SQL and that amounts are DECIMAL. Table: orders +----------+-------...

Data Manipulation (SQL/Python)
0
0
8 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
Amazon logo
Amazon
Medium
Data Scientist Locked

Contrast OLS, DiD, and PSM assumptions

Contrast three ways to estimate whether a free employee shuttle raised participation at sites the business chose to equip: OLS, difference-in-differen...

Statistics & Math
6
0
59 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Hard
Data Scientist

Derive logistic regression and thresholds

Logistic Regression Deep Dive (Binary Classification) Assume a binary classification setting with observations {(x_i, y_i)} for i=1..n, where x_i ∈ R^...

Statistics & MathRegression & Statistical ModelingSupervised Learning
11
0
92 people solved
Oct 13, 2025
Medium
Data Scientist

Implement KNN from scratch

Without using ML libraries, implement k-Nearest Neighbors for classification. Requirements: (a) Support Euclidean and cosine distances; (b) Allow tie-...

Coding & Algorithms
5
0
46 people solved
Oct 13, 2025
Instacart logo
Instacart
Medium
Data Scientist Locked

Diagnose 4% weekly revenue drop using history

Diagnose a 4% week-over-week revenue drop using only 104 weeks of weekly totals, deciding whether it is ordinary noise or a genuine anomaly and how un...

Analytics & Experimentation
4
0
43 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
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