What gives the quickest access: CPU register, CPU cache, RAM, HDD.
Write -1 as a 4 bytes integer using hexadecimal notation

Question

What gives the quickest access: CPU register, CPU  cache,  RAM, HDD.
Write -1 as a 4 bytes integer using hexadecimal notation

Paul · Accepted Answer

What gives the quickest access: CPU register, CPU cache   , RAM, HDD: It Depends !

Sigiloso · Answer

registers are always fastest memory on CPU, followed by L1 or L2 cache. 


Negative one in signed twos-complement for a 32-bit (4 byte) integer is 0xFFFFFFFF. All bits set to 1 ALWAYS has the value -1 regardless of width.

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