What must be the first characters of a database URL?

A. db,

B. db:

C. jdbc,

D. jdbc:

Answer

D. jdbc:

Explanation:

All JDBC URLs begin with the protocol JDBC followed by a colon as a delimiter. 

Option D is the only one that does both of these, making it the answer.

For example:

The following lines of code illustrate using the getConnection() method uses URL to connect to a MySQL database:

try (Connection connection = DriverManager
            .getConnection("jdbc:mysql://localhost:3306/mysql_database?useSSL=false", "root", "root");