Which of the following files should be multiplexed, for safety? (choose all correct answers.)
a. system tablespace datafiles
b. control file
c. initialization parameter file
d. archive logfiles

B)Control File

              D)Archive Log-files

Explanation:

Control file is a file which holds the status of the databases elements such as names, location,online redo files, etc in binary form. This requires the multiplexing by collecting all these database elements into one encapsulated unit.

Archive log-files are those file which holds the redo files in the offline ports which contain the elements.The also form a single group for the safety by multiplexing method.

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