Learn the meaning of IML in mainframe terminology. Discover why Initial Micro-programming Load is the correct expansion of this key acronym.
Table of Contents
Question
The term IML stands for
A. Initial Machine Load
B. Initial Micro-programming Load
C. Initial Machine Level
D. Initial Micro program Level
Answer
B. Initial Micro-programming Load
Explanation
IML stands for Initial Micro-programming Load in mainframe computing. When a mainframe system is powered on or restarted, the IML process loads the micro-programs that implement the mainframe’s instruction set into a special high-speed memory called the control storage.
The micro-programs are low-level instructions that define how the mainframe’s physical components execute the machine language instructions. They essentially act as an interpreter between the higher-level machine code and the mainframe’s circuitry.
During the IML, these critical micro-programs are loaded from storage (such as disk drives) into the control storage so that they are immediately accessible to control and coordinate the operation of the mainframe’s hardware. This micro-programming layer is what allows a mainframe’s physical circuitry to execute the desired instructions and programs.
So in summary, IML is the process of loading the micro-programs into control storage to enable the mainframe’s instruction set, which is essential for the mainframe to start up and run programs. The other options given – Initial Machine Load, Initial Machine Level, and Initial Micro program Level – are not the correct expansion of the IML acronym in this mainframe context.
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