DeepFrontend
Learning Paths
Practice
System Design & DS
Design Studio
Data Structures Curriculum
Real-World Case Studies
Careers
Job Board
Resume Builder
Blog
Sign in
Search
⌘K
Go Pro
Loading compiler resources...
Ask DeepFrontend AI
System Design Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
System Design
How does Airbnb check whether a home is available for a 5-day stay in under 10 nanoseconds?
A
By querying a PostgreSQL relational database table with 365 rows
B
By performing a fast bitwise AND operation on an in-memory 365-bit calendar bitmask (listing_mask & query_mask === query_mask)
C
By emailing the host automatically
D
By executing a machine learning model
Check Answer