What will be the best way for computer science students in Nepal for better salary .

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

Consider the following statements, then select one of the answers below: the signal() function shown below registers "sig_handler()" as the signal handler function for the sigkill signal, without the complexity of using when the sigkill signal is sent to a process running this code, by a user typing "kill -kill ", where the correct process id is used for to target the process, sig_handler() will be executed.

Plz ( which is an example of a good url?