Microprocessor
The first machine cycle of an instruction is always

 A memory write cycle
 A memory read cycle
 An I/O read cycle
 A fetch cycle

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Microprocessor
When .9432 E – 4 is subtracted from .5452 E – 3 in normalized floating point mode

.9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed
None of the numbers is changed
Both Ihe numbers are changed and their exponents are, made equal to -5
.5452 E – 3 is changed to 5.452 E – 4 but .9432 E – 4 is not changed

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Microprocessor
The correct sequence of steps in the instruction cycle of a basic computer is

 Fetch, Decode, Read effective address and, Execute.
 Fetch, Read effective address, Decode and Execute.
 Fetch, Execute, Decode and Read effective address.
 Read effective address, Decode, Fetch and Execute.

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