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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
Point72 logo
Point72
Medium
Quantitative Researcher

Correct T-Statistics for Overlapping Windows

Correct T-Statistics for Overlapping Windows A time-series regression uses observations built from overlapping rolling sums of current and lagged iid ...

Statistics & Math
2
0
19 people solved
Jun 7, 2025
Meta logo
Meta
Medium
Data Scientist

Define Metrics and Account for Network and Novelty Effects

Metrics for Notification-Triggered In-App Surveys Meta's notification system triggers optional in-app surveys to measure user sentiment after notifica...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
67
0
104 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Maintain top N payers

Maintain top N payers Implement topNPayers(n) that returns the n accounts with the highest cumulative outgoing payment amounts as strings formatted "{...

Coding & Algorithms
2
0
44 people solved
Aug 9, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Compute shortest path in cyclic graph

This question evaluates understanding of graph algorithms and shortest-path computation in weighted directed graphs, including handling cycles, non-ne...

Coding & Algorithms
3
0
70 people solved
Jan 3, 2026
Snapchat logo
Snapchat
Medium
Data Scientist

Compute posterior spam risk from flags

A binary classifier flags spammy requesters. Last week the base rate of spam among all requesters was 12%. The classifier has true positive rate (TPR)...

Statistics & Math
8
0
84 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Design A/B Test for Short-Video Recommendation Algorithm

Design A/B Test for Short-Video Recommendation Algorithm A/B Test: New Short‑Video Recommendation Algorithm Context You are evaluating a new recommend...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
10
0
90 people solved
Aug 4, 2025
Citadel logo
Citadel
Medium
Data Scientist

Compute variance of trading profits

Compute variance of trading profits Symmetric Random Walk Trading Strategy: Profit Variance and Expectation Setup - Let S_t be a simple symmetric rand...

Statistics & Math
4
0
94 people solved
Aug 4, 2025
Netflix logo
Netflix
Easy
Data ScientistIntern Locked

Estimate ATE, ITT, and TOT from experiment

This question evaluates a data scientist's competency in causal inference and experimental analysis, specifically the estimation and interpretation of...

Analytics & ExperimentationCausal Inference
11
0
152 people solved
Jan 17, 2026
TikTok logo
TikTok
Hard
Product Manager

TikTok Product Strategy & Case Design

Product Decision-Making and Design Prompts: TikTok PM You are interviewing for a Product Manager role. Answer the following mini-prompts. State assump...

Product / Decision MakingProduct StrategyPrioritization & Tradeoffs
22
0
158 people solved
Jul 4, 2025
PayPal logo
PayPal
Medium
Data Scientist

Describe Leading Without Authority in Data Management

Behavioral Interview: Leading Without Authority in Data Management You will be assessed on cultural fit and how you operate in ambiguous, messy data e...

Behavioral & Leadership
33
0
94 people solved
Jul 12, 2025
Microsoft logo
Microsoft
Easy
Data Scientist

Compute and plot a precision–recall curve

Precision–Recall (PR) curve coding / evaluation You are given a binary classifier’s outputs on a dataset: - y_true: array of true labels in \(\{0,1\}\...

Machine LearningModel EvaluationML Coding
9
0
139 people solved
Jan 17, 2026
Meta logo
Meta
Hard
Software Engineer AI

Solve Two Backtracking Array Problems

You will solve two independent coding problems. For each problem, first discuss edge cases, then implement a correct solution, and finally explain how...

Coding & AlgorithmsBacktracking & RecursionTwo Pointers & Sliding Window
39
0
321 people solved
Apr 27, 2026
The Trade Desk logo
The Trade Desk
Medium
Software EngineerSenior+ Locked

Calculate Bowling Game Score

This question evaluates a candidate's ability to implement rule-based scoring logic, array processing, and stateful iteration to correctly aggregate f...

Coding & Algorithms
2
0
38 people solved
Jun 2, 2026
Samsung logo
Samsung
Medium
Data Scientist

Estimate laptops in an office

Give a back-of-the-envelope estimate for how many laptops are physically present in a typical corporate office at a given moment. State your assumptio...

Statistics & Math
3
0
59 people solved
Mar 19, 2026
Meta logo
Meta
Medium
Data Scientist

Convince PM to Implement Duplicate Observation Tool

Convince PM to Implement Duplicate Observation Tool Scenario Meta is considering building a Duplicate Observation Tool (DOT) to detect malicious copy‑...

Analytics & Experimentation
7
0
49 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Product Manager

Amazon Fit, Motivation & Leadership Principles

Amazon Product Manager Fit, Motivation, and Leadership Principles Prepare for an Amazon Product Manager behavioral onsite focused on motivation, role ...

Behavioral & Leadership
10
0
86 people solved
Jul 4, 2025
TikTok logo
TikTok
Medium
Data Scientist

Analyze Trade-off Between DAU Growth and Ad Revenue

Analyze Trade-off Between DAU Growth and Ad Revenue Analytics Case: DAU vs. Ad Revenue Trade-off in a Consumer Video App Context You are a data scient...

Analytics & Experimentation
3
0
70 people solved
Aug 4, 2025
Capital One logo
Capital One
Hard
Data Scientist

Build a causal ML pipeline end-to-end

Policy Targeting from Causal Inference to Production Context You completed a causal-inference project estimating the effect of a binary marketing trea...

Analytics & Experimentation
3
0
55 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Easy
Data Scientist

Do US members upload more videos than non-US?

You suspect video posting adoption differs between US and international members. Tables members - memberid INT (PK) - country VARCHAR (e.g., 'usa', '...

Analytics & ExperimentationMetrics & KPIsSegmentation & Cohort Analysis
9
0
90 people solved
Feb 1, 2026
TikTok logo
TikTok
Hard
Software Engineer

Improve and measure service performance

Assessing and Improving a Service’s Performance Under High Load Context You are responsible for a user-facing, stateless HTTP microservice that handle...

System Design
5
0
78 people solved
Sep 6, 2025
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