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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
TikTok logo
TikTok
Medium
Data Scientist

Write SQL for geo posting-frequency drops

Using the schema below, write a single ANSI SQL query (window functions allowed) that identifies countries with the largest share of creators whose po...

Data Manipulation (SQL/Python)SQLMetric Diagnostics
12
0
100 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Can one car serve all riders?

This question evaluates understanding of interval scheduling and conflict detection, testing skills in time-interval reasoning, sorting, and efficient...

Coding & AlgorithmsIntervals & Scheduling
7
0
78 people solved
Apr 6, 2026
Dandy logo
Dandy
Medium
Machine Learning EngineerSenior+

How do you interpolate in 3D?

Given two points in 3D space, p0 = (x0, y0, z0) and p1 = (x1, y1, z1), how do you compute a point between them using interpolation? Define the interpo...

Software Engineering FundamentalsMath & Number Theory
11
0
92 people solved
Apr 5, 2026
TikTok logo
TikTok
Medium
Software Engineer

Solve pair-counting and account-merging problems

Problem A — Count qualifying products You are given two integer arrays A and B, and an integer T. For each element a in A, count how many elements b i...

Coding & Algorithms
4
0
73 people solved
Dec 8, 2025
PayPal logo
PayPal
Hard
Machine Learning Engineer

Design RL-based spending limit policy

RL System Design: Per‑User Spending Limits You are designing a reinforcement learning (RL) system to set per-user spending limits in a payments/risk c...

ML System Design
4
0
75 people solved
Sep 6, 2025
Robinhood logo
Robinhood
Hard
Data Scientist

Diagnose sustained drop in executed trades

Brokerage Analytics Troubleshooting: Trades Per Active User Down 22% Context You are the analyst for a brokerage product that spans onboarding through...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
13
0
103 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Resolve Team Conflicts and Deliver Beyond Project Scope

Resolve Team Conflicts and Deliver Beyond Project Scope Behavioral Case: Team-Based Data Science Collaboration, Scope, and Customer Interaction Instru...

Behavioral & Leadership
4
0
58 people solved
Aug 4, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Identify incorrect HTTP status code description

Which of the following descriptions about HTTP status codes is incorrect? Options: - A. 100 means the client should continue sending the request. - B....

Software Engineering Fundamentals
7
0
57 people solved
Oct 24, 2025
Amazon logo
Amazon
Medium
Data Scientist

Navigate Crises and Sustain Team Morale Under Pressure

Navigate Crises and Sustain Team Morale Under Pressure Behavioral & Leadership — Data Scientist Onsite Scenario You are working as a Data Scientist on...

Behavioral & Leadership
16
0
82 people solved
Aug 4, 2025
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Compute Total Manual Distance

This question evaluates array processing, state simulation, and algorithmic reasoning for deterministic stepwise processes, including handling unsorte...

Coding & Algorithms
6
0
63 people solved
Mar 29, 2026
EY logo
EY
Hard
Data Scientist

Compare two FS domains deeply

Compare Two Financial Services Domains Context: You are interviewing for a data-focused role in financial services. Pick any two domains from the list...

Behavioral & Leadership
2
0
39 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Hard
Software Engineer Locked

Design an async job system and cache layer

This question evaluates system design competencies including asynchronous job orchestration, reliable background processing (state transitions, retrie...

System DesignSystem Design FundamentalsCaching
16
0
162 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Compute Each Advertiser's Share of Shop Ad Spend

Practice a data science SQL interview problem that calculates each advertiser's seven-day Shop ad spend share after applying a total-spend threshold. ...

Data Manipulation (SQL/Python)
2
0
26 people solved
May 22, 2026
Moment logo
Moment
Medium
Frontend Engineer

Build a Race-Free Memory Card Game in React

Build a Race-Free Memory Card Game in React Implement the interaction logic for a React memory-card game. Every card has a stable ID and a match value...

Software Engineering Fundamentals
1
0
21 people solved
Apr 9, 2026
Instacart logo
Instacart
Hard
Software EngineerSenior+ Locked

Implement store, evaluator, and parser

This question evaluates implementation skills in data structures and algorithms, covering time-based versioning and TTL in an in-memory key-value stor...

Coding & AlgorithmsKey-Value StoresParsing & Interpreters
13
0
113 people solved
Jan 29, 2026
Point72 logo
Point72
Hard
Data Scientist

Explain and tune decision trees robustly

Decision Trees: Splitting, Tuning, Overfitting, and When to Use Ensembles Context: You built a CART-style decision tree for a take‑home ML project. An...

Machine LearningSupervised LearningModel Evaluation
5
0
100 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Explain how browser authentication works with JWTs

This question evaluates understanding of browser-based authentication with JWTs, covering token storage trade-offs, how tokens are sent with requests,...

Software Engineering Fundamentals
9
0
70 people solved
Feb 11, 2026
Upstart logo
Upstart
Easy
Data Scientist

Calculate Particle Survival Probability After Time t

Calculate Particle Survival Probability After Time t Radioactive-Decay Style Probability Context You have 100 identical, independent particles. Each p...

Statistics & MathProbability
8
0
132 people solved
Aug 4, 2025
Capital One logo
Capital One
Medium
Data Scientist

Cover HR screen: role, motivation, comp, immigration, location

Prompt: 90‑Second Summary and Logistics for a Data Scientist Technical Screen Context You are preparing for a Data Scientist technical screen. Provide...

Behavioral & Leadership
2
0
48 people solved
Oct 13, 2025
Capital One logo
Capital One
Easy
Data ScientistSenior+ Locked

Compute Optimal Die Re-roll Strategy

This question evaluates a candidate's understanding of optimal stopping, expected-value computation, and decision-making under uncertainty in probabil...

Statistics & MathPuzzles & Brainteasers
11
0
109 people solved
Feb 28, 2026
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