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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
Google logo
Google
Medium
Software Engineer

Find mode in a trinary search tree

You are given the root of a trinary search tree where each node has up to three children: `text class Node { int val; Node left; // all values ...

Coding & AlgorithmsTrees
17
0
187 people solved
Nov 16, 2025
Google logo
Google
Medium
Software Engineer Locked

Compute distance to nearest taxi in grid

This question evaluates understanding of graph traversal and shortest-path reasoning on grids, algorithmic problem-solving for computing distances fro...

Coding & AlgorithmsGrids & Matrices
31
0
249 people solved
Jan 10, 2026
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+

Design a Global Calendar Service

Design a calendar system for users in multiple time zones. The system should support: - creating, updating, deleting, and viewing calendar events - on...

System DesignSystem Design FundamentalsAPI Design
13
0
145 people solved
Feb 16, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Explain motivation and mission alignment

In a behavioral interview for a mission-driven tech company, you are asked two related questions: 1. Why do you want to join this company? 2. How does...

Behavioral & LeadershipMotivation & Fit
37
0
285 people solved
Oct 20, 2025
Oracle logo
Oracle
Medium
Software Engineer

Design a URL shortener: short-code generation, fast redirects and scaling

Design a URL shortening service. A user submits a long URL and receives a short link; anyone who opens the short link is redirected to the original UR...

System DesignSystem Design FundamentalsCaching
0
0
2 people solved
Aug 1, 2026
Coinbase logo
Coinbase
Medium
Software Engineer

Implement debounced autocomplete component

Implement debounced autocomplete component Implement an Autocomplete Input Component Context Build a reusable web UI component that provides typeahead...

Software Engineering FundamentalsUI Components & AccessibilityJavaScript & TypeScript
13
0
109 people solved
Aug 4, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Solve two array and string problems

You will solve two independent coding tasks. Problem 1: Generate All Subsets of a Set You are given an integer array nums containing n distinct elemen...

Coding & AlgorithmsBacktracking & RecursionStacks & Queues
17
0
208 people solved
Oct 16, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Group words that map to same phone digits

Problem On a classic phone keypad (T9), letters map to digits: - 2: ABC, 3: DEF, 4: GHI, 5: JKL, - 6: MNO, 7: PQRS, 8: TUV, 9: WXYZ Given a list of lo...

Coding & AlgorithmsArrays & Strings
12
0
189 people solved
Oct 20, 2025
Meta logo
Meta
Medium
Product Manager

Meta Pay: Metrics & Prioritization

Product Metrics and Prioritization Prompt: Meta Pay Assume you are the PM for Meta Pay, the consumer payments system used across Meta apps such as Mes...

Product / Decision Making
19
0
87 people solved
Jul 4, 2025
Instacart logo
Instacart
Easy
Data Scientist

How would you investigate a metric decline?

Scenario You are a Data Scientist supporting a consumer marketplace product. A key business metric (e.g., orders/day, conversion rate, revenue, profit...

Analytics & ExperimentationMetric DiagnosticsSegmentation & Cohort Analysis
22
0
160 people solved
Feb 6, 2026
TikTok logo
TikTok
Hard
Machine Learning Engineer

Define QKV for recommender cross-attention

You are designing a deep-learning–based recommendation system that uses a Transformer-style cross-attention block to model the interaction between a u...

Machine Learning
9
0
86 people solved
Dec 8, 2025
HubSpot logo
HubSpot
Hard
Software Engineer

Design a near-real-time weather API

Question Design a weather data platform that retrieves best-effort hourly dumps from an external Weather Service API for approximately 2,000 locations...

System DesignSystem Design FundamentalsCaching
21
0
261 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Engineer

Write SQL for library analytics

Given a library database, write SQL to answer the following: 1) Count the number of books that are currently not returned (i.e., still checked out) an...

Data Manipulation (SQL/Python)
6
0
58 people solved
Jul 16, 2025
Intuit logo
Intuit
Easy
Data Scientist

Diagnose KPI anomaly and evaluate promotion/A-B test

Diagnose KPI anomaly and evaluate promotion/A-B test You are a Data Scientist supporting a TurboTax product team. You are asked to handle three relate...

Analytics & ExperimentationMetric DiagnosticsCausal Inference
16
0
172 people solved
Aug 1, 2025
Google logo
Google
Medium
Machine Learning Engineer Locked

Explain GRPO-style training for diffusion models

This question evaluates understanding of reinforcement learning applied to diffusion-based generative models, covering policy optimization, reward mod...

Machine LearningReinforcement LearningFine-Tuning & Alignment Techniques
12
0
141 people solved
Dec 8, 2025
Amazon logo
Amazon
Hard
Data Scientist

Design an operations dashboard with justifications

Design an Operations Dashboard for Same-Day Delivery Station Performance Goal Create a real-time dashboard for a delivery-station manager to monitor a...

Analytics & Experimentation
8
0
62 people solved
Oct 13, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Calculate Break-Even Point and Profit Impact Analysis

Calculate Break-Even Point and Profit Impact Analysis Break-even and Profit Sensitivity for a Restaurant Context A restaurant has fixed monthly costs ...

Analytics & ExperimentationBusiness Case Analysis
12
0
109 people solved
Aug 4, 2025
Expedia logo
Expedia
Hard
Data Scientist

Validate and monitor ranking model end-to-end

Expedia Hotel-Ranking Model: Evaluation, Metrics, Diagnostics, Rollout, and KPI Alignment Context: You are building a learning-to-rank (LTR) model to ...

Machine Learning
10
0
95 people solved
Oct 13, 2025
Cloudflare logo
Cloudflare
Easy
Software Engineer

Describe experience performing code reviews

During the interview, you are asked: > Have you ever done any code reviews? If yes, the interviewer may follow up with questions about how you review ...

Behavioral & Leadership
10
0
70 people solved
Dec 8, 2025
Instacart logo
Instacart
Hard
Software Engineer

Design cloud storage with quotas and compression

System Design: Multi‑Tenant Cloud Storage Service (Take‑Home) You are tasked with designing a multi‑tenant cloud storage service that supports file up...

System DesignFile & Media StorageAPI Design
18
0
133 people solved
Sep 6, 2025
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