Which language uses the symbolic representation of machine codes needed to program a particular processor or processor family ?

Assembly language is a low-level programming language that serves as a symbolic representation of machine code. Unlike machine language, which consists of raw binary digits (0s and 1s) executed directly by the CPU, assembly language uses human-readable mnemonics and symbolic names to represent specific machine instructions. Each assembly instruction typically has a one-to-one correspondence with a machine code instruction for a specific processor architecture [1]. Because it is closely tied to the hardware, assembly language is platform-dependent; instructions are tailored to a particular processor or processor family, meaning code written for one architecture will not function on another unless they share the same instruction set. An assembler is used to translate these symbolic mnemonics back into the binary opcodes that the computer hardware understands [1].

Sources

1. [1] https://www.sciencedirect.com/topics/computer-science/assembly-language-program