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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
Amazon logo
Amazon
Hard
Software EngineerSenior+ Locked

Implement a Half-Open Interval Range Module

Implement a range module over half-open intervals with add, remove, and full-coverage query operations. Handle merging adjacent ranges, splitting trac...

Coding & Algorithms
9
0
109 people solved
Jul 5, 2026
Pinterest logo
Pinterest
Medium
Software Engineer

Pack Boxes Through a One-Sided Warehouse

Problem boxes gives the heights of unit-width boxes, and warehouse gives the room heights from left to right. You may choose the boxes’ insertion orde...

Coding & AlgorithmsGreedySorting
1
2
12 people solved
Reddit logo
Reddit
Medium
Software Engineer

Implement a sliding-window rate limiter

Problem Design and implement an in-memory rate limiter using a sliding time window. You are given a stream of requests. Each request has: - key (e.g.,...

Coding & AlgorithmsRate LimitingData Structure Design
27
0
308 people solved
Nov 10, 2025
Microsoft logo
MicrosoftGoogleAmazon

Also asked at Amazon, Meta, Bloomberg

Easy
Software Engineer

Create a Student DataFrame from a List

Problem Implement the pandas function below to construct a DataFrame from student_data, a two-dimensional list containing student IDs and ages. `pytho...

Data Manipulation (SQL/Python)Pandas & Python Data
1
0
8 people solved
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Data Scientist

Exploit a Rock-Paper-Scissors Opponent with a Forbidden Gesture

Two rational players play rock-paper-scissors. After observing the opponent's first gesture, you know the opponent cannot use that gesture on the next...

Statistics & MathPuzzles & BrainteasersProbability
0
0
7 people solved
Aug 28, 2026
Harvey logo
Harvey
Hard
Software Engineer Locked

Design a RAG Q&A Agent over Law Firm Legal Memos

This question evaluates a candidate's ability to design a retrieval-augmented generation system, covering ingestion, chunking, indexing, retrieval, an...

ML System DesignRetrieval-Augmented GenerationEmbeddings & Vector Search
18
0
307 people solved
Jun 18, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design the GPU Job Scheduler for a Text-to-Video Generation Service

This system design question evaluates a candidate's ability to design a resource-scheduling layer for scarce, expensive compute under sustained overlo...

System DesignGPU InfrastructureJob Scheduling & Workflows
72
1
1311 people solved
Jun 26, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design a thread-safe high-QPS rate limiter

Question You are building a backend service that must enforce API rate limits. Design and (at a high level) implement a rate limiter, then work throug...

System Design
22
0
168 people solved
Feb 18, 2026
ByteDance logo
ByteDance
Hard
Data ScientistIntern

Predict Short-Video Engagement with Skewed Data

Predict Short-Video Engagement with Skewed Data You need to predict a future engagement quantity for a short video. Explain what data you would reques...

Machine LearningSupervised LearningFeature Engineering
1
0
22 people solved
Sep 11, 2026
Apple logo
Apple
Medium
Software Engineer

Capture Enclosed O Regions in an X/O Grid Using Union-Find Instead of Flood Fill

You are given an m × n board in which every cell is 'X' or 'O'. Two 'O' cells are connected when they share an edge (up, down, left or right), and a r...

Coding & AlgorithmsGraphsGrids & Matrices
1
0
24 people solved
Jul 3, 2026
Microsoft logo
Microsoft
Medium
Product Manager

Microsoft Teams Product Design for Globally Distributed Coworkers

You are a product manager on Microsoft Teams. Design a Teams feature that makes it easier for colleagues who work in different time zones to collabora...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
12 people solved
Sep 21, 2026
eBay logo
eBayMetaGoogle

Also asked at Google, Microsoft, Amazon, LinkedIn, Apple, Uber, Databricks, Waymo, Oracle

Medium
Software Engineer

Minimum Knight Steps on an Infinite Board

Problem A knight starts at (0,0) on an infinite board. Each step changes the coordinates by (±2,±1) or (±1,±2). Return the minimum steps to (x,y). The...

Coding & AlgorithmsGraphsGrids & Matrices
2
0
16 people solved
Microsoft logo
Microsoft
Hard
Software Engineer

Design a fault-tolerant load balancer for a cloud compute layer

Design a load balancer for the compute layer of a cloud platform: it receives client traffic and spreads it across a pool of backend compute instances...

System DesignSystem Design FundamentalsFault Tolerance & Failover
0
0
8 people solved
Aug 5, 2026
Meta logo
Meta
Medium
Product Manager

Goals, North-Star Metric and Guardrails for Scam Protection Across Meta's Apps

Imagine you are the product manager for a scam-prevention product at Meta, built to protect people from scams across its apps. Define the goals for th...

Analytics & ExperimentationMetrics & KPIsTrust & Safety
1
0
17 people solved
Sep 9, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Merge Sorted Event Streams Through an Iterator

Implement a lazy chronological merge iterator with one head per active stream, stable timestamp ties, has-next semantics, exhausted streams, and bound...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design
9
1
139 people solved
Sep 14, 2026
CVS Health logo
CVS Health
Easy
Software EngineerSenior+

Describe Your Strongest Technical Area

What is your strongest technical area? Explain the depth of your experience, a problem that demonstrates it, and the limits of your expertise. Constra...

Behavioral & LeadershipSelf-Awareness & Growth
1
0
11 people solved
Jul 25, 2026
Visa logo
Visa
Medium
Software Engineer

Minimum Travel Cost Between Array Indices

Minimum Travel Cost Between Array Indices You are given a strictly increasing integer array nums and a list of independent queries queries. For an ind...

Coding & AlgorithmsArrays & StringsGraphs
0
0
11 people solved
Apple logo
Apple
Medium
Software Engineer

Persist Hardware Signals through an Asynchronous Sink

Design a service that receives hardware signals at about100 requests per second and efficiently persists them to object storage. Discuss asynchronous ...

System DesignData Ingestion & CDCFault Tolerance & Failover
1
0
12 people solved
Jul 25, 2026
Microsoft logo
MicrosoftAmazonMeta

Also asked at Meta, Google, Spotify, DoorDash, Apple, Datadog, Snapchat

Medium
Software EngineerSenior+

Median of Every Fixed-Length Sliding Window in an Integer Array

Given an integer array nums and a window length k, slide a window of exactly k consecutive elements across the array from left to right, one position ...

Coding & AlgorithmsHeaps & Priority QueuesTwo Pointers & Sliding Window
2
1
30 people solved
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Respond to a Reliability Regression Shortly After Deployment

Respond to a post-deployment latency or reliability regression with scoped diagnosis, safe rollback decisions, customer-impact measurement, and preven...

Software Engineering FundamentalsReliability & SRECI/CD & Deployment
4
0
46 people solved
Sep 10, 2026
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