The major components of a digital computer system are CPU, memory, I/O unit and system bus. ( )
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Microcontrollers usually have ()
A. CPU
B. CPU+RAM+ROM
CPU+RAM+ROM+Peripherals
D. CPU+RAM+ROM+Peripherals+Buses
An 8-bit microprocessor has essentially ()
A. 8-bit ALU
B. 8-bit Accumulator
C. Most registers are 8-bit registers
D. all of these candidates
An embedded microcontroller usually means ()
A microcontroller for the embedded system
B. microcontroller with embedded processor
C. A microcontroller with external memories storing the embedded software
D. microcontroller with all necessary resources available on-chip.
Which of the following is output device?()
A. keyboard
B. mouse
C. display screen
D. scanner
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