"Knock Knock"

"Who's there?" 

"Knock Knock"

"Who's there?" 

"Knock Knock"

"Who's there?" 

- DoS Attack

- Knock, knock

- An async function

- Who's there?

"Knock knock"
"Sorry"
"Knock"
"Sorry"
"kNoCk KnOcK"
"Sorry"

-Brute Force Attack

Don't you just love cracking dev jokes and have that one special flower start with their:

"well, technically..."

followed by an explanation showing how much expertise in the field they've gathered over the years to be able to point out your joke is not 100% accurate.

Imagine them at a party.

- Knock knock
- Well, technically you wouldn't ASK who's there, statistically people would look first, but nice try

Knock knock!

Who's there?

(after sixty seconds)

Java program.

- Knock knock...

- Who's there?
- Who's there?
- Who's there?

- non-idempotent request...
- non-idempotent request...
- non-idempotent request...