Machine code is data that is directly fed into a microprocessor, being the only form that the processor is able to execute. It is the lowest possible level of abstraction, wherein all data is a raw binary stream. Machine code is barely readable by humans, which is why assembly is usually utilized instead.
Every processor or processor family has its own instruction set. This is a set of instructions the processor has been designed to execute. These instructions are binary codes and in general are not human readable, one would have to memorize the bit patterns. Assembly language is a human readable representation of the machine code where the assembly language mnemonics and following syntax attempt a one to one assembly language instruction to machine code instruction relationship. But assembly language has a fair amount of additional syntax that is not directly related to machine code or machine language.
https://en.wikipedia.org/wiki/Machine_code
The machine-code tag is used for questions related to machine code. Additional tags like disassembly and assembly and others may also be used.
A tag specifying the architecture arm, x86, riscv, mips, msp430 (and many others), is needed as the machine code for different architectures is not compatible, and the question will be difficult to answer without knowing the architecture.
