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

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

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Operating System (OS)
You should choose sleep option when

The computer is tired after working for the whole day
You finish working and going to bed
When computer gets hanged frequently. Let it sleep for some time
You are leaving for a very short time and want to resume you work shortly

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