Is byte_List A byte string?

JSON is a widely used standard for serialising and deserialising data sent over http (and other protocols). Under the given context, your approach should be the right way to go. Your variable byte_list isn't actually a list. It is a byte string representing a list. Similarly, x is a string, not a list.

What is the difference between a list and a byte?

A List is a List not an array. byte is a primitive type, Byte is its wrapper class, like int and Integer. Both can be used to create an array of bytes No, the first one creates an array of bytes. The second one defines a list of bytes, which may or may not be backed by an array depending on which List implementation you use.

What is a byte used for?

A byte can also grasp a string of bits that need to be used in some larger units of application processes (e.g., the stream of bits that composes a visual image for a program that represents images or the string of bits that composes the machine code of a computer program).