Hot backup is those type of backup where you can take the Backup while Database (eg. Oracle) is running state. In a hot backup, the database remains open all times and available for users. When you copied any files of the database, after that any save changes occur on a database then changes files are copied during backup must be saved too.

Logical backups are those types of backups in which the export utility (for eg Exp) uses SQL to read data from the database and then export it into a binary file at the operating system levels. You can also import the data backup into a database using the import utility (Imp). The Oracle Export Utility can create a file that contains many types of objects in a particular schema.