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
Assembly and output
Code generation
None of these

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Operating System (OS)
Memory

is a sequence of instructions
None of these
is a device that performs a sequence of operations specified by instructions in memory.
is the device where information is stored
is typically characterized by interactive processing and time-slicing of the CPU

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Operating System (OS)
The CPU, after receiving an interrupt from an I/O device

hands over control of address bus and data bus to the interrupting device
None of these
branches off to the interrupt service routine after completion of the current instruction
branches off to the interrupt service routine immediately
halts for a predetermined time

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