Explanation/Reference:
Explanation:
The alert log is a chronological log of messages and errors, and includes the following items:
All internal errors (ORA-600), block corruption errors (ORA-1578), and deadlock errors (ORA-60) that

occur
Administrative operations, such as CREATE, ALTER, and DROP statements and STARTUP,

SHUTDOWN, and ARCHIVELOG statements
Messages and errors relating to the functions of shared server and dispatcher processes

Errors occurring during the automatic refresh of a materialized view

The values of all initialization parameters that had nondefault values at the time the database and

instance start
Note:
* The alert log file (also referred to as the ALERT.LOG) is a chronological log of messages and errors written out by an Oracle Database. Typical messages found in this file is: database startup, shutdown, log switches, space errors, etc. This file should constantly be monitored to detect unexpected messages and corruptions.