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...
Express.js Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
Express.js
What does a preflight request represent, and which HTTP method does it execute under?
A
A database check executed via a GET query
B
An automated browser check to confirm server CORS permissions, executing under the OPTIONS method before the actual request runs
C
A token refresh operation executing under a POST method
D
A compression validation check executing under a HEAD method
Check Answer