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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
Physical Intelligence logo
Physical Intelligence
Hard
Software Engineer

Hand-Write a Bounded Cache for a Database-Backed Backend Service

In a one-hour hands-on coding round, you work in a remote development environment (an editor connected over SSH) that already contains a small backend...

Software Engineering FundamentalsCachingData Structure Design
2
0
18 people solved
Sep 8, 2026
Attentive logo
Attentive
Medium
Software Engineer

Design a Real-Time Ad Serving System with Budgets and Impression Tracking

Design an ad serving system. When a web page or app has an ad slot to fill, it sends an ad request to your system. The system must pick one ad from th...

System DesignAds Systems
1
0
14 people solved
Sep 15, 2026
Fivetran logo
Fivetran
Easy
Software Engineer

Implement a SQL Engine's Storage Layer: Create Database, Schema, Table and Row CRUD

You are working inside a SQL engine. Earlier stages have already parsed, validated, and optimized each statement. Your job is the last step: the layer...

Software Engineering FundamentalsDatabase Internals
0
0
14 people solved
Sep 10, 2026
Disney logo
Disney
Medium
Software Engineer

Thread-Safe Buffered Batch Writer for Streaming Records into a Database

Records arrive continuously from a stream and must be written to a database. Many threads receive records and hand them to your component concurrently...

Software Engineering FundamentalsConcurrency
2
0
29 people solved
Aug 30, 2026
Meta logo
Meta
Medium
Software EngineerSenior+

Scale a Cache or Rate Limiter Across Multiple Machines

Consider a production component that provides caching or rate limiting. Choose one of those components, define its basic behavior, and explain how you...

System DesignCachingConsistency & Availability
3
0
47 people solved
Aug 25, 2026
Uber logo
Uber
Hard
Software Engineer

Count Islands After Each Land Addition to an All-Water Grid

Start with an m x n grid in which every cell is water. You receive a sequence of operations: operation i turns the cell positions[i] = [r, c] into lan...

Coding & AlgorithmsGraphs
0
0
9 people solved
Sep 29, 2026
xAI logo
xAI
Medium
Software Engineer

Hand-Write a Parallel Sort Using Multiple Worker Threads or Processes

Implement a parallel sort by hand. Write a function parallel_sort(values, num_workers) that returns the elements of values in ascending order, exactly...

Software Engineering FundamentalsConcurrencySorting
2
0
21 people solved
Sep 5, 2026
DoorDash logo
DoorDash
Hard
Software Engineer Locked

Debug the Last-Element Random Allocation Case

Examine the subtle self-swap-and-pop edge case in an O(1) random allocator and build deterministic regression tests around it.

Software Engineering Fundamentals
13
0
88 people solved
Sep 1, 2026
Verkada logo
Verkada
Medium
Frontend Engineer

Implement a Camera List UI from a Defined Visual Contract

Implement a camera-list UI in React with careful layout, spacing, and state presentation. Constraints & Assumptions The original visual reference is u...

Software Engineering FundamentalsCSS & LayoutReact & UI Frameworks
1
0
15 people solved
Sep 15, 2026
LinkedIn logo
LinkedIn
Hard
Software Engineer Locked

Merge and Serialize N-ary Trees

Define explicit N-ary tree merge semantics, implement the contract without mutating inputs, and design a deterministic, validated round-trip format.

Software Engineering Fundamentals
7
0
71 people solved
Sep 1, 2026
Pinterest logo
Pinterest
Easy
Software Engineer

Design a Typeahead Suggestion System

Design a typeahead system that suggests completions as a user types. Begin by clarifying the suggestion corpus, matching and ranking behavior, freshne...

System DesignSearch & Feed SystemsCaching
4
0
40 people solved
Aug 22, 2026
Google logo
Google
Medium
Software Engineer Locked

Design a Music Recommendation System with an LLM Agent

Design a music recommender with candidate generation, ranking, feedback loops, cold-start handling, diversity, and offline and online evaluation. Add ...

ML System Design
8
1
76 people solved
Aug 11, 2026
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Can One k Always Maximize kNN Leave-One-Out Accuracy?

Can One k Always Maximize kNN Leave-One-Out Accuracy? A question asks which value of k maximizes leave-one-out cross-validation accuracy for k-nearest...

Machine LearningModel EvaluationSupervised Learning
1
0
14 people solved
Sep 15, 2026
Roblox logo
Roblox
Medium
Software Engineer

Handle Release Risks and Cross-Team Blockers

Discuss the most effective and least effective ways to respond to the following workplace scenarios. Explain your reasoning and what additional inform...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
7
0
55 people solved
Aug 30, 2026
Netflix logo
Netflix
Medium
Software Engineer

Design ad frequency capping

Design an Ad Frequency Capping System Design a frequency capping system for an advertising platform. The system must ensure that a user does not see t...

System DesignAds SystemsRate Limiting
590
4
5474 people solved
Apr 15, 2026
Indeed logo
Indeed
Medium
Software Engineer

Compare Arrays and Linked Lists for Indexed Operations

Compare arrays and linked lists as representations of an ordered sequence. Explain how their memory layouts affect indexed reads, insertion, traversal...

Software Engineering FundamentalsLinked ListsArrays & Strings
1
0
11 people solved
Sep 16, 2026
Anthropic logo
Anthropic
Hard
Performance / Infrastructure Software EngineerSenior+ Locked

Explain Why This Mission and Why Change Roles Now

Practice answering why a mission matters, why a job change makes sense now, and how current work connects to future goals. The framework uses truthful...

Behavioral & Leadership
7
0
66 people solved
Aug 24, 2026
Figma logo
Figma
Medium
Software Engineer Locked

Design Permission-Aware Retrieval for Design Files

Design search for design files and assets using short text queries, structured filters, and permissions delegated by the initiating user. The system-d...

System DesignSearch & Feed SystemsAuthentication & Authorization
12
0
216 people solved
Jul 21, 2026
DoorDash logo
DoorDash
Medium
Data Scientist Locked

Diagnose Why Delivered Food Arrives Cold

Work through a data science case on why delivered food arrives cold. Define a reliable complaint metric, decompose the order timeline, separate mix sh...

Analytics & ExperimentationMetric Diagnostics
62
0
767 people solved
Jul 19, 2026
Okta logo
Okta
Medium
Software Engineer Locked

Scale an Authorization Checker

Extend the role-permission access checker for multithreaded and distributed execution, addressing consistency, concurrency, and scaling trade-offs.

System Design
3
0
48 people solved
Aug 20, 2026
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