Question

what general categories of functions are specified by computer instructions

Answer 1

i might be wrong, but computable functions?

Answer 2

The basic function preformed by computer is execution of program Which consists of a set of instructions stored in memory, the processor dose the actual work by executing instructions specified in the program …instruction prossing consists of 2 steps : The processor read(fetches) instructions from memory one at a time and Executes each instruction .

The processor interprets the instruction and performs the required action. In general, these actions fall into four categories.

Processor-Memory
Data may be transferred from processor to memory or from memory to processor.

Processor-I/O
Data may be transferred to or from a peripheral device by transferring between the processor and an I/O module.

Data Processing
The processor may perform some arithmetic or logic operation on data.

Control
An instruction may specify that the sequence of execution be altered.

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