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What does the word "dead beef" mean? I read it from a interview question. It has something to do with ipv6. I figured it could be a random hex number used for examples, like "The quick brown fox jumps over the lazy dog".
Is my understanding correct? Or it has more significant meaning?
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0xDEADBEEF ("dead beef") is frequently used to indicate a software crash or deadlock in embedded systems. DEADBEEF was originally used to mark newly allocated areas of memory that had not yet been initialized -- when scanning a memory dump; it is easy to see the DEADBEEF.
"DEADBEEF" goes back for decades, perhaps even before the Internet. (I would guess I was using it in the late 70s at IBM.) It's just a way to mark, in a way that is easily visible in hex dumps, storage that is deallocated or otherwise not to be accessed.
DEADBEEF, the hexadecimal representation of the 32-bit number 3735928559, used in Hexspeak and as a magic debug value.
http://en.wikipedia.org/wiki/Hexspeak
http://www.urbandictionary.com/define.php?term=dead%3Abeef
"Dead beef" is a very popular sentence in programming, because it is built only from letters a-f, which are used in hexadecimal notation. Colons in the beginning and in the middle of the sentence make this sentence a (theoretically) valid IPv6 address.
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