Q1]

import java.sql.*;

public class DonarTableColumnsInfo {
   
    private static final String JDBC_URL = "jdbc:mysql://localhost:3306/your_database_name";
    private static final String USERNAME = "your_username";
    private static final String PASSWORD = "your_password";

    public static void main(String[] args) {
        try (Connection connection = DriverManager.getConnection(JDBC_URL, USERNAME, PASSWORD)) {
            DatabaseMetaData metaData = connection.getMetaData();

           
            ResultSet resultSet = metaData.getColumns(null, null, "DONAR", null);
            System.out.println("Columns information for the DONAR table:");

            while (resultSet.next()) {
                String columnName = resultSet.getString("COLUMN_NAME");
                String columnType = resultSet.getString("TYPE_NAME");
                int columnSize = resultSet.getInt("COLUMN_SIZE");

                System.out.println("Column Name: " + columnName);
                System.out.println("Column Type: " + columnType);
                System.out.println("Column Size: " + columnSize);
                System.out.println("-----------------------------------");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}


Q2]


import java.util.LinkedList;

public class LinkedListOperations {
    public static void main(String[] args) {
       
        LinkedList<Integer> linkedList = new LinkedList<>();

    
        linkedList.addFirst(10);
        linkedList.addFirst(20);
        linkedList.addFirst(30);

        
        System.out.println("LinkedList after adding elements at first position: " + linkedList);

    
        linkedList.removeLast();

    
        System.out.println("Size of LinkedList: " + linkedList.size());
    }
}