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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Data Engineer

Write SQL for active follow connections

Table: follow_events(requester_id INT, target_id INT, event STRING CHECK (event IN ('request_follow','follow_success','follow_reject','unfollow')), ev...

Data Manipulation (SQL/Python)
3
2
40 people solved
Aug 1, 2025
Upstart logo
Upstart
Hard
Data Scientist

Explain career moves and defend moat

Interview Prompt: Career Chronology, Competitive Advantage, and Exec Presentation Trade‑offs Context: You are interviewing for a Data Scientist role i...

Behavioral & LeadershipMotivation & FitMarket & Competitive Analysis
12
0
91 people solved
Oct 13, 2025
Point72 logo
Point72
Medium
Quantitative Researcher

Compare Missing-Value Strategies for Linear Models

Compare Missing-Value Strategies for Linear Models A continuous feature has missing values in a linear prediction problem. Compare three treatments: m...

Machine Learning
2
0
16 people solved
Jun 7, 2025
Easy
Data Scientist Locked

How would you measure and experiment on harmful content?

This question evaluates a data scientist's competency in measuring and experimenting on harmful user-generated content, focusing on severity quantific...

Analytics & Experimentation
3
0
25 people solved
Feb 17, 2026
Uber logo
Uber
Medium
Software Engineer

Solve vault rate and subset-sum

1) Robber vaults rate: You are given an array vaults of positive integers where vaults[i] is the amount in the i-th vault, and an integer h (hours). I...

Coding & AlgorithmsDynamic ProgrammingBinary Search
9
0
84 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Choose root to minimize edge reversals

This question evaluates understanding of directed versus undirected graph representations, tree rooting, and optimization of edge orientations, testin...

Coding & AlgorithmsTreesDynamic Programming
7
0
119 people solved
Feb 11, 2026
Optiver logo
Optiver
Medium
Data Scientist

Prove a Tight Lower Bound on a Latin Square's Lower-Triangle Sum

Consider an $n \times n$ grid ($n \ge 1$) filled with integers so that every row contains each of the numbers $1, 2, \ldots, n$ exactly once, and ever...

Software Engineering Fundamentals
4
0
64 people solved
Mar 21, 2025
Morgan Stanley logo
Morgan Stanley
Medium
Data Scientist Locked

Answer basic probability and statistics questions

This question evaluates core probability and statistics competencies, including interpretation of Poisson rate parameters from PMF shapes, identificat...

Machine Learning
5
0
57 people solved
Aug 23, 2025
Amazon logo
Amazon
Medium
Data Scientist

Evaluate Soft Skills Through Behavioral Interview Questions

Behavioral and Leadership Interview: Soft Skills You are interviewing for a Data Scientist role in an onsite Behavioral and Leadership round. Prepare ...

Behavioral & Leadership
114
0
333 people solved
Jul 12, 2025
Citadel logo
Citadel
Hard
Machine Learning Engineer

Make a hard MoE router differentiable

Make a hard MoE router differentiable Differentiable Routing for Mixture-of-Experts (MoE) Context You are working with an MoE layer that routes each t...

Machine LearningNeural Networks & Training
29
0
210 people solved
Jul 15, 2025
Meta logo
Meta
Medium
Data Scientist

Launch Sticker-Reply Feature in Facebook Groups?

Launch Sticker-Reply Feature in Facebook Groups? Launch Decision: Sticker-Reply Feature for Facebook Groups Context You are evaluating whether to laun...

Analytics & Experimentation
4
0
37 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Compute partnership profit and break-even population

Co‑marketing Partnership Economics — 12‑Month Evaluation Setup - Issuer C1 earns 1% of a cardholder’s total card spending (interchange-like revenue). ...

Analytics & ExperimentationBusiness Case AnalysisSegmentation & Cohort Analysis
13
0
96 people solved
Oct 13, 2025
Two Sigma logo
Two Sigma
Easy
Data Scientist Locked

Merge two sorted lists

This question evaluates a candidate's competency in array manipulation and merging algorithms, emphasizing understanding of ordered data and time comp...

Coding & AlgorithmsTwo Pointers & Sliding Window
5
0
92 people solved
Feb 13, 2026
Amazon logo
Amazon
Hard
Data Scientist

Apply Double ML with text-address features

Estimate the ATE of a First Reminder on CSAT via Double Machine Learning (DML) Context You have observational data on customer satisfaction (CSAT) sur...

Machine Learning
9
0
72 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Resolve cross-functional conflicts using analytics results

Answer the following behavioral prompts for a data science/product analytics role working cross-functionally (PM, Eng, Ads/Sales): 1) Describe a time ...

Behavioral & Leadership
3
0
41 people solved
Oct 14, 2025
Lyft logo
Lyft
Easy
Data Scientist

Explain Bayes’ Theorem and P-Value in Decision-Making

Explain Bayes’ Theorem and P-Value in Decision-Making Statistics Fundamentals: Bayes' Theorem and p-Values Context Stakeholders want clear, decision-f...

Statistics & MathBayesian StatisticsHypothesis Testing
27
0
143 people solved
Aug 4, 2025
Wells Fargo logo
Wells Fargo
Medium
Data Scientist

Design Excel visuals for risk results

Design Excel visuals for risk results Excel Dashboard Design: Communicating EL, RWA, and Concentration Risk Context You are preparing an Excel dashboa...

Analytics & Experimentation
4
0
52 people solved
Jul 26, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Evaluate Chatbot Launch: Value, Risks, Impact, Success Metrics

Meta analytics prompt on evaluating a retailer-facing chatbot launch, covering opportunity sizing without A/B testing, user and business metrics, mode...

Analytics & Experimentation
55
0
80 people solved
Jul 12, 2025
Asana logo
Asana
Medium
Software Engineer

Design a Twitter-like service

Design a simplified Twitter-like system that supports: - Users can post short messages (tweets). - Users can follow/unfollow other users. - Home timel...

System DesignSearch & Feed SystemsSystem Design Fundamentals
22
0
218 people solved
Jan 7, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Maximize area between vertical lines

This question evaluates algorithmic reasoning with arrays and the ability to optimize pairwise measurements, specifically assessing understanding of h...

Coding & Algorithms
4
0
63 people solved
Jan 4, 2026
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