Explanation/Reference:
C: The saviour of having to type in the username and password each and every time that you start a server. A very useful little file to have, particularly if you have multiple managed servers.
By default, this appears in the Admin Servers security directory ($DOMAIN_HOME/servers/AdminServer/ security) when a domain is created in development mode and is called boot.properties. The file is only created for the admin server, not for any additional servers; simply copying the security directory over is enough. The password is encrypted for the domain, so it can only be used for servers within that domain.
In production mode, the boot.properties file doesn't exist.
D: Development mode enables a WebLogic Server instance to automatically deploy and update applications that are in the domain_name/autodeploy directory (where domain_name is the name of a WebLogic Server domain). Production mode disables the auto-deployment feature and prevents any applications you place in the autodeploy directory after you switch to production mode from being deployed.
Note:
* By default, a WebLogic Server domain runs in development mode.
* You can run a WebLogic Server domain in two different modes: development and production. Only development mode allows you use the auto-deployment feature