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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
Hard
Data Scientist

Diagnose rising account switching and falling actives

Diagnostic Plan: Account Switching Up, Active Users Down Context You observed a sudden pattern: the number of users switching accounts increased, whil...

Analytics & Experimentation
4
0
37 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write SQL for theme-park revenue and visits

You are given theme-park ticketing and visits data. Write SQL to answer the following, using the sample schema and tables below. Return both the query...

Data Manipulation (SQL/Python)
2
0
25 people solved
Oct 13, 2025
Citadel logo
Citadel
Medium
Software Engineer Locked

Merge K timestamped lists with timestamp coalescing

This question evaluates algorithmic skills in merging multiple sorted sequences, coalescing records by key (timestamp), merging sorted value arrays, a...

Coding & AlgorithmsHeaps & Priority QueuesSorting
24
0
167 people solved
Jan 22, 2026
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Design a Versioned Key-Value Store

This question evaluates understanding of time-versioned data structures, temporal indexing, and efficient lookup strategies for storing and retrieving...

Coding & Algorithms
3
0
49 people solved
Jan 26, 2026
Airbnb logo
Airbnb
Hard
Software Engineer

Design a multi-channel notification system

System Design: Multi-Channel Notifications (Email, SMS, Push, In‑App) Context Design a notification platform that reliably delivers messages across mu...

System DesignSystem Design FundamentalsMessaging & Event-Driven
11
0
217 people solved
Sep 6, 2025
xAI logo
xAI
Easy
Software Engineer

In-Memory Key-Value Database with Nested Transactions

In-Memory Key-Value Database with Nested Transactions Implement an in-memory key-value database that processes a sequence of commands and supports nes...

Coding & Algorithms
5
0
45 people solved
Jun 7, 2025
Instacart logo
Instacart
Medium
Software Engineer

Describe your most complex end-to-end project

Describe your most complex end-to-end project End-to-End Project Deep Dive (Behavioral) Describe the most complex end-to-end project you led or signif...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
4
0
83 people solved
Jul 31, 2025
Meta logo
Meta
Hard
Software Engineer

Implement held transfers with accept/cancel

Implement held transfers with accept/cancel Design and implement a two-phase ("pull-style") money-transfer system in which funds are first held on the...

Coding & Algorithms
9
0
61 people solved
Aug 9, 2025
Meta logo
Meta
Medium
Software Engineer

Design unit tests for grid navigation

Mouse-Maze Controller: Design a Comprehensive Unit Test Suite Context (assumptions to make the task self-contained) Assume we are testing a controller...

Software Engineering FundamentalsTesting & Quality
4
0
76 people solved
Sep 6, 2025
Google logo
Google
Medium
Data Scientist

Build Classifier: Evaluate with AUROC for Imbalanced Data

Detecting Dead Links: Build and Evaluate a Classifier You have a dataset of 1,000 URLs labeled as good, meaning alive, or bad, meaning dead. The class...

Machine Learning
32
0
115 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Data Scientist

Solve Search Insert Position Using Binary Search

Scenario Live coding round for an Amazon Applied Scientist position; candidate must solve LeetCode 35 (Search Insert Position) without helper librarie...

Coding & Algorithms
71
0
225 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Calculate CTR and ad revenue

This question evaluates proficiency in data manipulation and analytics, specifically metric calculation (CTR) and multi-currency revenue aggregation, ...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
8
1
89 people solved
Jan 25, 2026
Amazon logo
Amazon
Hard
Data Scientist

Solve subset-count and kth-factor problems

Two Independent Tasks A) Maximum Count Under Sum Constraint You are given an integer array arr and an integer budget n. Return the maximum number of e...

Coding & Algorithms
4
0
66 people solved
Oct 13, 2025
PayPal logo
PayPal
Medium
Software Engineer

Compare write-back vs write-through caches

Compare write-back and write-through caching policies. Explain how each handles writes, coherence, durability, latency, and bandwidth; discuss typical...

Coding & Algorithms
3
0
60 people solved
Aug 7, 2025
TikTok logo
TikTok
Medium
Software Engineer

Implement binary tree in-order traversal

Given the root of a binary tree, return the in-order ordering of its node values. Implement both a recursive solution and an iterative solution using ...

Coding & Algorithms
7
0
53 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Data Scientist

Estimate revenue of organic shopping tab

Estimate Monthly Revenue for a New Shopping Tab (Organic Only) Context You are evaluating the potential monthly revenue impact of launching a new Shop...

Analytics & Experimentation
5
0
41 people solved
Oct 13, 2025
Reevo logo
Reevo
Medium
Software Engineer

Fetch and aggregate paginated team data via API

Implement a function getTopTeams(baseUrl, n) that calls a paginated HTTP API returning a JSON array of team objects on each page: [{"name": string, "w...

Data Manipulation (SQL/Python)
2
0
24 people solved
Aug 12, 2025
Meta logo
Meta
Easy
Data Scientist

Calculate Expected Impressions and Probability for Users

Expected Impressions From Random Ad Allocation There are X distinct users and Y ad impressions. Each impression is assigned independently and uniforml...

Statistics & Math
18
0
74 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Solve vertical order & diameter variants

Question LeetCode 314. Binary Tree Vertical Order Traversal LeetCode 543. Diameter of Binary Tree – modified to return the number of nodes (edges + 1)...

Coding & Algorithms
4
0
23 people solved
Jul 29, 2025
Shopify logo
Shopify
Medium
Data Scientist

Assess Candidate's Remote Collaboration and Technical Proficiency

Behavioral Interview: Remote Cross-functional Data Scientist You are interviewing for a Data Scientist role on a cross-functional analytics team that ...

Behavioral & Leadership
120
0
403 people solved
Jul 12, 2025
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