Operating System (OS)
In analyzing the compilation of PL/I program, the description "creation of more optimal matrix" is associated with

Machine independent optimization
Assembly and output
Code generation
None of these
Syntax analysis

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Operating System (OS)
Backups should be done

None of these
weekly for most installations
as several image copies, followed by an incremental
as several incrementals, followed by an image copy
daily for most installations

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