QUESTION 1:
import java.*;
import java.sql.*;
QUESTION 2:
// Open a connection and check connection status
conn = DriverManager.getConnection(DB_URL);
if(conn.isClosed())
System.out.print("false");
else
System.out.print("true");
QUESTION 3:
import java.sql.*;
import java.util.Scanner;
import java.lang.*;
public class Question103 {
public static void main(String...