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To reference existing ASM files, you need to use a fully qualified ASM filename. Your development database has a disk group named DG2A, the database name is DEV19, and the ASM file that you want to reference is a datafile for the USERS02 tablespace. Which of the following is a valid ASM filename for this ASM file?
Correct Answer: B
Explanation/Reference: Explanation: Fully Qualified File Name Form (link) A fully qualified file name has the following form: +diskgroup/dbname/filetype/filetypetag.file.incarnation Where: +diskgroup is the disk group name preceded by a plus sign. You can think of the plus sign (+) as the root directory of the Oracle ASM file system, similar to the slash (/) on UNIX or Linux computers. dbname is the DB_UNIQUE_NAME of the database to which the file belongs. filetype is the Oracle file type and can be one of the file types shown in Table 7-3. filetypetag is type-specific information about the file and can be one of the tags shown in Table 7-3. file.incarnation is the file/incarnation pair, used to ensure uniqueness. For example, filetype = 'DATAFILE', Data files and data file copies filetypetag = 'tblspname', Name of the tablespace into which the file is added