Answer:
constant or constant expression
register name
variable name (memory)
Explanation:
Literally, operand means data which an operation can be performed on. The operation could be an arithmetic or logical operation.
From the list of options, several operations can be performed on:
- constants e.g.

- registers and
- variables e.g. (a + b)
<em>However, no operation can be performed on keywords and/or reserved words.</em>
Answer:
The answer is D
Explanation:
file association associates a file with an application capable of opening that file. More commonly, a file association associates a class of files with a corresponding application.
They sometimes offer free service
Answer:
The core difference between the two jobs is that software developers are the creative force that deals with design and program implementation, while software engineers use the principles of engineering to build computer programs and applications.
Explanation: