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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
Google logo
Google
Hard
Software Engineer

Design a global restaurant menu update system

Design a menu update system for a global chain of restaurants. Context: - The chain operates in many countries. - Each restaurant may have multiple ki...

System DesignSystem Design FundamentalsFault Tolerance & Failover
24
0
261 people solved
Nov 12, 2025
Capital One logo
Capital One
Medium
Software Engineer

Sorted Sums of Absolute Differences Over All Cyclic Shifts of an Array

You are given two integer arrays nums1 and nums2 of the same length n. For each shift t from 0 to n - 1, rotate nums1 cyclically by t positions and ad...

Coding & AlgorithmsArrays & Strings
0
0
9 people solved
Aug 4, 2026
Riotgames logo
Riotgames
Easy
Software Engineer Locked

Trace a Web Page Load Through the Browser

Explain what happens when a browser opens a web address, from networking through HTML/CSS parsing, DOM and CSSOM construction, JavaScript compilation,...

Software Engineering Fundamentals
1
0
15 people solved
Aug 26, 2026
Netflix logo
Netflix
Hard
Software Engineer

Design an ad frequency capping system

Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad to a user, it must enforce ca...

System DesignAds SystemsRate Limiting
224
0
1747 people solved
Mar 9, 2026
Plaid logo
Plaid
Medium
Software Engineer

Compute discounted prices in a queue

Given an integer array prices where prices[i] is the price of the i-th item in a checkout line, apply the following rule: for each i, find the first j...

Coding & AlgorithmsStacks & Queues
30
0
445 people solved
Sep 6, 2025
Rippling logo
Rippling
Medium
Software Engineer Locked

Prevent Duplicate Payments Under High Load

This system design question tests a candidate's ability to reason about idempotency, distributed consistency, and fault tolerance in high-throughput p...

System DesignPayments & LedgersDistributed Transactions & Idempotency
78
1
824 people solved
May 30, 2026
Riotgames logo
Riotgames
Easy
Software Engineer Locked

Explain JavaScript Numeric Edge Cases

Explain JavaScript numeric classification and parsing behavior, including integer checks, NaN, and Infinity edge cases.

Software Engineering Fundamentals
1
0
15 people solved
Aug 26, 2026
Headway logo
Headway
Medium
Software Engineer

Handle traffic spikes and estimate server capacity

Scenario You are designing and operating a backend service that receives API requests from clients. Recently, the service becomes slow or times out wh...

System DesignReliability & SREObservability
18
0
211 people solved
Feb 11, 2026
Ramp logo
Ramp
Hard
Software Engineer Locked

Traverse an HTTP Maze with Retry Handling

Traverse a simulated HTTP maze with breadth-first search to return the shortest route from a start URL to an exit. Handle links, malformed input, succ...

Coding & Algorithms
4
0
75 people solved
May 25, 2026
Molocoads logo
Molocoads
Medium
Machine Learning Engineer Locked

Compute the Longest Run of Ones Across Multiple Machines

Design an exact distributed reduction for the longest run of ones when a binary input is split across ordered machines. The solution derives a constan...

System Design
1
0
15 people solved
Aug 26, 2026
Capital One logo
Capital One
Medium
Data ScientistSenior+ Locked

Compare Logistic Regression and Random Forest in Python

Compare logistic regression and random forest for a binary classification problem implemented in Python. Cover preprocessing pipelines, regularization...

Machine LearningSupervised LearningModel Evaluation
25
0
190 people solved
May 31, 2026
ByteDance logo
ByteDance
Hard
Software Engineer

Implement Expiring LRU Cache

Implement an in-memory key-value cache with least-recently-used eviction and per-entry expiration. The cache has a fixed positive capacity. Each inser...

Coding & Algorithms
5
0
49 people solved
Apr 14, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Design mkdir and ls for a Basic File System

Review a clean object model and path-resolution contract for implementing mkdir and ls in a basic file system.

Software Engineering Fundamentals
1
0
26 people solved
Aug 22, 2026
Google logo
Google
Medium
Software EngineerSenior+ Locked

Respond Constructively to Difficult Feedback

Explain how you handled difficult professional feedback without reflexive agreement or rejection. Test the feedback against observable patterns, adopt...

Behavioral & Leadership
6
0
41 people solved
Aug 6, 2026
Attentive logo
Attentive
Medium
Software Engineer

Design a Data Puller for a Third-Party API Capped at 3 Requests per Second

Design a service that pulls data from a third-party provider's API into your own system and keeps it up to date. The provider enforces a hard rate lim...

System DesignRate LimitingAPI Integration & HTTP Clients
0
0
6 people solved
Sep 7, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Build a File-Backed Key-Value Store

This question evaluates a candidate's understanding of persistent key-value storage, in-memory versus on-disk state management, serialization/deserial...

Coding & AlgorithmsKey-Value StoresFile & Media Storage
13
0
122 people solved
Apr 11, 2026
Databricks logo
Databricks
Hard
Software Engineer Locked

Design an Online Bookstore

This question evaluates a candidate's ability to design a scalable, fault-tolerant online bookstore by addressing service decomposition, functional re...

System DesignSystem Design Fundamentals
26
0
380 people solved
Mar 15, 2026
Anthropic logo
Anthropic
Hard
Software Engineer

Compute a Global Mode Across Distributed Partitions

Compute the mode of data partitioned across several workers using supplied send/receive-style communication primitives. Explain the protocol and how y...

Software Engineering FundamentalsBatch & Stream ProcessingPartitioning & Consistent Hashing
2
0
24 people solved
Mar 30, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Count Matrix Cells Whose Row and Column Neighbors Match

This Hudson River Trading software engineering question asks candidates to count matrix cells whose row and column neighbors match. It is useful for p...

Software Engineering FundamentalsGrids & Matrices
20
0
216 people solved
Jul 2, 2026
Capital One logo
Capital One
Medium
Data Scientist

Analyze Subscription, Insurance, App, and Card Cases

You are in a Data Scientist "power day" interview for a product analytics role. The interviewer gives you four independent business cases. For each on...

Analytics & ExperimentationBusiness Case Analysis
39
0
696 people solved
Apr 12, 2026
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