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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
Netflix logo
Netflix
Medium
Software EngineerSenior+

Model Direct-Sold DSP Orders

Design a data model for tracking a direct-sold demand order in a demand-side advertising platform. Context: - The platform manages advertiser demand a...

Software Engineering FundamentalsAds SystemsSystem Design Fundamentals
40
0
307 people solved
Apr 3, 2026
Netflix logo
Netflix
Medium
Software Engineer Locked

Count Pairs of Strings with Disjoint Character Sets

Count unordered index pairs of lowercase strings whose character sets do not overlap, treating duplicate strings at different positions separately. Co...

Coding & Algorithms
5
1
77 people solved
Jul 31, 2026
Google logo
Google
Medium
Software Engineer Locked

Minimum Cars for Rental Requests

You receive rental requests, each with a unique request identifier, pickup time, and return time. Work through the function contract, boundary cases, ...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
20
0
132 people solved
Aug 1, 2026
Imc logo
Imc
Easy
Hardware Engineer Locked

Analyze an Instruction Trace with Latency, Throughput, Cache, and Roofline Constraints

Analyze a simulated instruction trace using dependency latency, issue throughput, cache behavior, arithmetic intensity, and roofline bounds. The solut...

Software Engineering Fundamentals
1
0
28 people solved
Aug 24, 2026
Coreweave logo
Coreweave
Medium
Software Engineer Locked

Design a Website Monitoring Service

This Coreweave system design question asks candidates to design a website monitoring service. It prepares candidates to discuss scheduling, probes, al...

System DesignObservabilitySystem Design Fundamentals
36
0
302 people solved
Jul 2, 2026
Instacart logo
Instacart
Medium
Software Engineer

Implement Search and Filters, Then Diagnose a Query-Ordering Bug

Build search and filtering for an existing web application using a React client and a Python FastAPI backend. Start by eliciting the missing requireme...

Software Engineering FundamentalsDebuggingReact & UI Frameworks
0
0
8 people solved
Sep 7, 2026
Airwallex logo
Airwallex
Medium
Software EngineerSenior+ Locked

Design a Large-File Analysis Report System

Design an authenticated large-file upload and analysis service with resumable storage, idempotent async jobs, versioned reports, and tenant isolation.

System Design
3
0
65 people solved
Sep 2, 2026
Hudson River Trading logo
Hudson River Trading
Hard
Software Engineer Locked

Explain Large Memory Allocation, Swap, and C++ Inline Trade-offs

This Hudson River Trading software engineering question probes large memory allocation, swap behavior, and C++ inline trade-offs. It prepares candidat...

Software Engineering FundamentalsOperating SystemsMemory Management
45
1
348 people solved
Jul 2, 2026
Verkada logo
Verkada
Medium
Software Engineer Locked

Distribute a Large Matrix Transpose

Design a fault-tolerant distributed matrix transpose using bounded tiles, idempotent placement, retries, and verifiable completion.

System Design
5
0
55 people solved
Aug 14, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Design a Streaming TLV Message Reassembler in C

Design a secure C reassembler for out-of-order TLV packets using bounded indexes, duplicate checks, and a protocol-defined completion rule. Learn safe...

Software Engineering Fundamentals
6
0
62 people solved
Aug 14, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Count Nodes Using Asynchronous Messages

You are given the identifier of a root node in a distributed network. Each node represents a separate machine. A node cannot directly inspect another ...

Coding & Algorithms
14
0
180 people solved
Mar 4, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Inventory Allocation by Bid Priority

This question assesses simulation and priority-queue design skills, requiring careful implementation of tiered, round-robin resource allocation under ...

Coding & AlgorithmsSimulation & State MachinesSorting
24
0
229 people solved
Jun 9, 2026
Bnsf logo
Bnsf
Hard
Software EngineerSenior+ Locked

Maximize Valid Trains from Shared Equipment

Optimize a fleet of locomotives and railcars into the largest possible number of valid trains, then maximize used railcar length. Respect capacity, le...

Coding & Algorithms
10
0
91 people solved
Jul 23, 2026
Axq Capital logo
Axq Capital
Medium
Software Engineer

Row-Wise vs Column-Wise Array Reads, L1/L2 Caches, and the TLB

In a screen for a performance-focused developer role, the interviewer asked a sequence of short questions about how programs use memory. Answer each p...

Software Engineering FundamentalsMemory ManagementOperating Systems
0
0
12 people solved
Sep 8, 2026
Sig logo
Sig
Easy
Data Scientist

Condition on a Chosen Rabbit Losing

Condition on a Chosen Rabbit Losing Three rabbits compete in a race, and exactly one rabbit wins. The least athletic rabbit wins with probability 1/13...

Statistics & Math
2
0
21 people solved
Aug 16, 2026
Oracle logo
Oracle
Medium
Software Engineer

Check That a String of Three Bracket Types Is Properly Nested

Given a string made only of the six bracket characters (, ), [, ], { and }, decide whether its brackets are properly nested. Function Signature `pytho...

Coding & AlgorithmsStacks & Queues
1
0
10 people solved
Sep 9, 2026
Amazon logo
Amazon
Medium
Software Engineer

Build a BFS Web Crawler

Implement a web crawler for a single website. You are given: - A starting URL startUrl - A function fetch(url) that returns the HTML content of a page...

Coding & AlgorithmsGraphs
45
0
350 people solved
Mar 12, 2026
Intuit logo
Intuit
Medium
Staff Software EngineerSenior+ Locked

Design a VIP-Aware Rate Limiter

Design a windowed rate limiter that admits five users at a time and prioritizes waiting VIP requests at each new window. Preserve idempotency and non-...

Software Engineering Fundamentals
6
0
59 people solved
Aug 14, 2026
Tradedesk logo
Tradedesk
Medium
Frontend Engineer

Implement a Publish-Subscribe Event Bus in JavaScript or TypeScript

Implement a publish-subscribe (pub/sub) utility in JavaScript or TypeScript for use inside one front-end application. Code should be able to subscribe...

Software Engineering FundamentalsJavaScript & TypeScriptData Structure Design
1
0
14 people solved
Sep 15, 2026
Salesforce logo
Salesforce
Medium
Member of Technical Staff Locked

Convert a Sorted Doubly Linked List to a Balanced BST In Place

Rewire a sorted doubly linked list into a height-balanced binary search tree without allocating replacement nodes. The solution uses list length and i...

Software Engineering Fundamentals
2
0
26 people solved
Aug 31, 2026
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