what are the two places we can keep portal-ext.properties file?

portal-ext.properties.

portal-ext.properties can be saved at two places.

The first is inside WEB-INF/classes of your Liferay Portal web application. This
can usually be used for any property addition that developers want to control and add.

The second place is in LIFERAY_HOME for more accessible changes by system admins, so that
they can add database or mail server-related settings or any system-related properties.