<span>A firewall is the best choice. This will help protect your computer from being seen on a network and being invaded by snoopers who are wanting to do damage to your system or files. Having a firewall is the first line of defense against hacking and sabotage.</span>
Answer:
(c) will be the correct option
Explanation:
Union-compatible : If there are two relations and both have are having same number of attributes then it called union compatibility the domain of similar attributes also must be same for union compatibility. Number of attributes means number of column
so from above discussion it is clear that option (C) will be correct option
Answer:
True
Explanation:
The main disadvantage of PDF is to edit the file's formatting. Because there are specialized program to edit the formatting of text.