Which two statements are true about trace files produced by the Oracle Database server? (Choose two.)

A. They can be written by server processes

B. Trace files are written to the Fast Recovery Area (FRA)

C. They can be written by background processes

D. All trace files contain error information that require contacting Oracle Support

E. Trace file names are based on the database name concatenated with a sequential number

Correct Answer: A,C

Reference:
https://gerardnico.com/db/oracle/trace_file
https://docs.oracle.com/html/E25494_01/monitoring001.htm
Each server and background process can write to an associated trace file. When an internal error is detected by a process, it dumps information about the error to its trace file. Some of the information written to a trace file is intended for the database administrator, and other information is for Oracle Support Services. Trace file information is also used to tune applications and instances.