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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
Two Sigma logo
Two Sigma
Medium
Data ScientistIntern

Why Is the Sample Mean Approximately Normal for Large Samples?

In statistics we routinely treat the average of a large sample as if it were normally distributed — for example, when building confidence intervals fo...

Machine Learning
6
0
44 people solved
Dec 1, 2024
ByteDance logo
ByteDance
Easy
Data Scientist Locked

Explain train-test generalization gap

This question evaluates understanding of model generalization and diagnostic competence within Machine Learning and Data Science, covering overfitting...

Machine Learning
6
0
52 people solved
Mar 9, 2026
Apple logo
Apple
Hard
Data Scientist

Compute optimal matrix-chain multiplication order

Matrix Chain Multiplication: Optimal Parenthesization and Analysis You are given five matrices to multiply: A1 (10×30), A2 (30×5), A3 (5×60), A4 (60×2...

Coding & Algorithms
9
0
89 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Convince Stakeholders: Prioritize Data Science Projects Effectively

Convince Stakeholders: Prioritize Data Science Projects Effectively Behavioral: Influencing Stakeholders and Prioritizing Work Context As a data scien...

Behavioral & LeadershipLeadership & InfluenceCommunication & Stakeholders
15
0
109 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Find when failures started in log stream

This question evaluates understanding of monotonic sequences and search algorithms (such as binary search), along with algorithmic reasoning about cor...

Coding & AlgorithmsBinary Search
5
0
97 people solved
Jan 22, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Explain a graphics testing project in depth

Explain a graphics testing project in depth Behavioral: End-to-End Walkthrough of a Graphics Testing Project Context: You are interviewing for a softw...

Behavioral & LeadershipProject Deep DiveTesting & Quality
9
0
94 people solved
Aug 9, 2025
Meta logo
Meta
Medium
Software Engineer

Count palindrome substrings in a string

Given a lowercase ASCII string s, count the number of substrings that are palindromes and return the count. Implement an O(n^ 2) solution using expand...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
8
0
89 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Data Scientist

Communicate trade-offs and influence launch

Product Experiment Trade‑off: Notifications for Multi‑Account Users Context You ran an experiment on notification delivery to users who often maintain...

Behavioral & Leadership
3
0
47 people solved
Oct 13, 2025
Adobe logo
Adobe
Hard
Software Engineer

Design file-embedding storage system

Design file-embedding storage system System Design: Multimodal Embedding Service for User Uploads Context You are designing a backend service that, fo...

ML System Design
19
0
88 people solved
Aug 4, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Compute weighted response rates by job category

You are given a CSV with one row per job posting and the following columns: job_id, job_category, invitations_sent (integer >= 0), provider_responses ...

Data Manipulation (SQL/Python)
2
0
31 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze User Comment Distribution and Sampling Effects

Analyze User Comment Distribution and Sampling Effects You are analyzing daily comment counts per user. The individual user-level distribution is righ...

Statistics & MathProbabilitySampling & Estimation
118
3
384 people solved
Jul 12, 2025
IXL Learning logo
IXL Learning
Medium
Software Engineer

Identify and prevent code-breaking inputs

Identify and prevent code-breaking inputs Identify inputs and scenarios that could break your implementation and explain how you would prevent them. C...

Coding & AlgorithmsTesting & Quality
8
0
89 people solved
Jul 17, 2025
Capital One logo
Capital One
Medium
Data Scientist

Calculate Longest Transaction Streak for Each User

transactions +---------------+---------+--------+----------------+-----------+----------+ | transaction_id| user_id | amount | transaction_date| merch...

Data Manipulation (SQL/Python)
3
0
36 people solved
Aug 4, 2025
Oracle logo
Oracle
Medium
Software Engineer

Determine if robot path is bounded

Determine if robot path is bounded A robot starts at (0, 0) facing North on an infinite grid. It executes a string s consisting of 'G' (move forward 1...

Coding & AlgorithmsSimulation & State Machines
9
0
92 people solved
Jul 26, 2025
Ge logo
Ge
Medium
Software Engineer

Minimize total distance to a store

Question 1: Choose a CVS location to minimize total distance You are given an M x N grid grid containing only 0 and 1. - grid[r][c] = 1 means there is...

Coding & Algorithms
6
0
52 people solved
Jan 22, 2026
Instacart logo
Instacart
Hard
Data Scientist

Improve low R² without p‑hacking

Predicting Contribution per Order with Low R² Context You are modeling contribution per order (a continuous per-order outcome such as margin or profit...

Machine LearningRegression & Statistical ModelingFeature Engineering
11
0
97 people solved
Oct 13, 2025
Pinterest logo
Pinterest
Hard
Machine Learning EngineerSenior+ Locked

Design an unsafe content detection system

This question evaluates a candidate's competency in end-to-end machine learning system design for unsafe user-generated content detection, covering mu...

ML System DesignModel EvaluationComputer Vision
14
0
145 people solved
Jan 12, 2026
Uber logo
Uber
Medium
Data Scientist

Evaluate Rider-Incentive Program Impact with Key Metrics

Evaluate a Rider-Incentive Program in a Ride-Hailing Marketplace A ride-hailing team plans to launch a new rider-incentive program and needs to evalua...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
80
0
222 people solved
Jul 12, 2025
PayPal logo
PayPal
Medium
Data Scientist

Identify Session with Maximum Overlapping Sessions Count

sessions | session_id | start_time | end_time | | 1 | 2023-01-01 09:00:00 | 2023-01-01 10:00:00 | | 2 | 2023-0...

Data Manipulation (SQL/Python)
87
0
509 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Solve BST and Grid Query Problems

This question evaluates understanding of binary search tree order-statistics and grid reachability under threshold constraints, testing competencies i...

Coding & Algorithms
7
0
60 people solved
Apr 19, 2026
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