Which action refers to the unauthorized and illegal duplication or sale of software?

The unauthorized and illegal duplication of copyrighted software; the most common form of software theft, is known as piracy.

piracy is the answer

answer: internal fragmentation is the difference between the (fixed) size of a memory hole and the data within in that memory. for example, if a 1,024 byte block of memory holds 800 bytes of data, then the 224 bytes difference is considered lost to internal fragmentation.

external fragmentation occurs when the sum of memory fragments is large enough to satisfy a request, but the holes are non-contiguous and the request cannot be satisfied. this can occur when memory is dynamically allocated and freed.

explanation:

answerfc- file compare;