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:
B
Explanation:
POP3 protocol is an email protocol that works by downloading and storing emails onto a user's device or tablet.
Answer:
The new root will be 2.
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Explanation:
The binary tree is not properly presented (See attachment)
To answer this; first, we need to order the nodes of the tree in a pre-order traversal.
We use pre-order because the question says if something is removed from the left child.
So, the nodes in pre-order form is: 14, 2, 1, 5, 4, 16.
The root of the binary tree is 14 and if 14 is removed, the next is 2.
<em>Hence, the new root will be 2.</em>
Answer: As the conventional etiquette, which lays out rules of ethics in social contexts, the purpose of netiquette is to help create and sustain a friendly, relaxed and productive atmosphere for online contact, as well as to avoid putting pressure on the system and creating tension between users.
Explanation: