[nickwhite917]

Knock knock. Who's there? (wait a few minutes) Java

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A DBA walks into a bar, goes up to two tables, and says: "can I join you?".

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Many great jokes here: http://www.hongkiat.com/blog/programming-jokes/

:)

[dozzie]

> Knock knock. Who's there? (wait a few minutes) Java

Knock knock. Assembler

[codingmyway]

Knock knock. Race condition. Who's there?