1. The CPU (central processing unit) does the calculations and comparisons that make the computer work. They use millions of transistors to do so.
2. The ROM holds all the programs on the computer. This is most often the "C" drive.
3. The ROM also has the operating system that is used to run the computer.
There is no truly unique identifier assigned to a PC. Any appearance of a unique ID is merely an illusion. The closest thing there is to a unique identifier is a MAC address, which is actually assigned to a network adapter (Ethernet port, wireless radio, etc.) and is usually unique but can be faked
Answer:
import java.util.regex.*;
import java.util.Scanner;
public class Password
{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Please enter the Password. \n");
String passwordString = input.next();
System.out.println(passwordCheck(passwordString));
}
public static boolean passwordCheck(String password){
if(password.length()>=8 && password.matches("[a-z0-9A-Z]+")){
return true;
}
else{
return false;
}
}
}
Explanation:
The Java class "Password" is used by the program to make an instance of the password object and check its validity with the passwordChecker method defined within the Password class. The passwordChecker method only matches alphanumeric passwords, that is, passwords with alphabets and numbers. If a non-alphanumeric character is encountered, the boolean value false is returned.
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