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x86 Interview Questions & Answers

x86 Interview Questions

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What are registers, and how are RAX, EAX, AX, and AL related in x86-64?

Registers hold values used directly by instructions. In x86-64, RAX names a 64-bit general-purpose register, EAX its low 32 bits, AX its low 16 bits, and AL its low 8 bits. These names refer to overla...

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Why does x86 being little-endian matter when inspecting memory?

For a multi-byte integer stored in memory, little-endian order places the least significant byte at the lowest address. A 32-bit value 0x12345678 therefore appears as bytes 78 56 34 12 in increasing a...

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