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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k 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
UiPath logo
UiPath
Medium
Machine Learning Engineer

Reliable LLM tool calling: format control, failure recovery, and runaway loops

You are building an LLM agent that uses tools: functions or APIs the model can invoke while working on a task. Answer the following questions about to...

Machine LearningAI AgentsLLM Applications
0
0
11 people solved
Sep 9, 2026
Nubank logo
Nubank
Medium
Software Engineer

Design an Online Coding Competition Platform

Design an Online Coding Competition Platform Design a service where participants submit code, run it in a secure sandbox, receive a score, and view a ...

System Design
4
0
57 people solved
Aug 18, 2026
Waymo logo
Waymo
Medium
Software Engineer

Design an Object Storage Service With Buckets, Keys and Durable Blob Storage

Design an object storage service. Clients create named buckets and, inside a bucket, store, read, list and delete objects: opaque blobs of bytes addre...

System DesignFile & Media StorageStorage & Sharding
1
0
15 people solved
Sep 10, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Evaluate Dependent Variable Assignments

Evaluate variable assignments whose expressions may depend on definitions appearing later in the input. This algorithmic exercise checks safe parsing,...

Coding & Algorithms
8
0
103 people solved
Aug 3, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer

Design a Comment-Likelihood Prediction System with a Focus on Feature and Model Serving

Design the machine-learning system behind comment likelihood on a large discussion platform where posts belong to communities: given a user and a post...

ML System DesignML Data Pipelines & Feature StoresMLOps & Model Serving
1
0
17 people solved
Sep 7, 2026
Amazon logo
Amazon
Medium
Software Engineer

Deliver an Important Project Under a Tight Deadline

Describe an important project you delivered under a tight deadline, including the tradeoffs and business impact. Constraints & Assumptions Use a real ...

Behavioral & LeadershipOwnership & ExecutionPrioritization & Tradeoffs
1
0
11 people solved
Sep 14, 2026
LinkedIn logo
LinkedIn
Easy
Software Engineer

Answer Repeated Shortest Word Distance Queries

Answer Repeated Shortest Word Distance Queries You are given a fixed array words and many queries. Each query contains two distinct words that both ap...

Coding & Algorithms
6
0
72 people solved
Aug 19, 2026
Decagon logo
Decagon
Hard
Software Engineer Locked

Add Nested Begin, Commit, and Abort Semantics to a Shopping Cart

Extend an in-memory shopping cart with nested begin, commit, and abort operations while preserving correct state visibility. Compare snapshot and undo...

Software Engineering FundamentalsData Structure Design
13
0
204 people solved
Jul 13, 2026
Optiver logo
Optiver
Hard
Software EngineerIntern

Optimize flight and cargo bookings for profit

OptiCargo: make the booking algorithm profitable You are given two streams/lists: - Flights you may attempt to book. Each flight has: - flight_id ...

Coding & AlgorithmsDynamic ProgrammingData Structure Design
233
1
1874 people solved
Dec 5, 2025
Google logo
Google
Medium
Software EngineerSenior+ Locked

Compute a Depth-Weighted Sum of a Nested List

Compute the depth-weighted sum of integers in an unevenly nested list. Compare recursive and iterative traversals while handling empty lists, negative...

Coding & AlgorithmsParsing & InterpretersMath & Number Theory
48
4
585 people solved
Aug 6, 2026
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design First-Fit and Best-Fit Memory Allocation

Design a contiguous-region heap allocator that supports two placement policies, block splitting, freeing, and adjacent-block coalescing. Explain metad...

Software Engineering FundamentalsMemory ManagementTesting & Quality
123
2
830 people solved
Jul 27, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Build a Delivery Payout Calculation API

Build a Delivery Payout Calculation API Build a payment-service endpoint POST /payout that accepts a delivery worker ID, requests that worker's order-...

Software Engineering Fundamentals
8
0
116 people solved
Mar 31, 2026
Goldman Sachs logo
Goldman Sachs
Easy
Software Engineer

Cache Trade-offs and a Constant-Time Least-Recently-Used Cache

This round opened with a short conversation about the trade-offs of caching and later asked you to design a least-recently-used (LRU) cache. Work thro...

Software Engineering FundamentalsData Structure DesignCaching
1
0
17 people solved
Sep 13, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Build a Resize-and-Rotate Image Pipeline with Multiprocessing

Design an image-processing pipeline that uses Pillow to resize and rotate images, then extend it to process independent images using multiple processe...

Software Engineering FundamentalsFile & Media StorageConcurrency
0
0
4 people solved
Oct 5, 2026
eBay logo
eBay
Easy
Applied Scientist

Design fast query-to-listing retrieval over tens of millions of listings

Users type free-text search queries into a marketplace, and the catalog holds tens of millions of listings. Design how the system quickly retrieves th...

ML System DesignRetrieval & Candidate GenerationSearch & Feed Systems
1
0
9 people solved
Sep 24, 2026
Citadel logo
Citadel
Medium
Software Engineer Locked

Minimize Changes to Make Every Password Block Palindromic

Return the minimum character changes needed so every fixed-length block in a lowercase password becomes a palindrome while block boundaries remain unc...

Coding & AlgorithmsTwo Pointers & Sliding Window
13
3
247 people solved
Aug 7, 2026
Mercor logo
Mercor
Medium
Software Engineer

Project Deep Dive With Product-Level Probing, AI Tool Use, and Startup Motivation

You are interviewing for a software engineer role at a startup. One round is a background conversation rather than a coding exercise. After a short se...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
6
0
68 people solved
May 1, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design a Highly Available Conversational AI Service

Design a Highly Available Conversational AI Service Design a conversational AI service that accepts a user message and streams a generated response. B...

System DesignSystem Design FundamentalsReal-Time Systems
14
0
182 people solved
Jul 17, 2026
Headlands logo
Headlands
Medium
Data Scientist

C++ Sliding-Window Mean of a Float Array With Inf, -Inf and NaN Handling

In C++, given an array arr of float values and a fixed window size k, compute the mean of every contiguous window of length k. The input may contain i...

Software Engineering FundamentalsTwo Pointers & Sliding WindowProgramming Languages
1
0
14 people solved
Aug 30, 2026
Plaid logo
Plaid
Medium
Software Engineer Locked

Count Completed Jobs in a Serial Single-Worker Pipeline

Calculate how many jobs finish before a deadline in a serial, stage-gated, single-worker pipeline. The prompt tests cumulative-time reasoning, partial...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings
25
0
214 people solved
Jul 13, 2026
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