Which symbol represents a process that is the most recently acted upon?

The symbol that represents a process that is the most recently acted upon is the plus sign. In many command-line interfaces and scripting environments, the plus sign is typically used to denote the most recently active process or to indicate a current state where an operation has been completed successfully. It signifies that an action has taken place recently, making it a common convention in various scripting and programming contexts.

In contrast, other symbols like the caret, asterisk, and hash do not carry this specific meaning related to process activity. The caret is often associated with denoting a position or a substitution, the asterisk usually represents wildcards or multiplication, and the hash might be used for comments or denoting specific identifiers in certain programming languages. Understanding these symbol usages is essential for effectively navigating and utilizing scripting and command-line tools in Linux.