9. With interrupt-driven I/O, if two or more devices request service at the same time, ________.
A : the device closest to the CPU gets priority
B : the device that is fastest gets priority
C : the device assigned the highest priority is serviced first
D : the system is likely to crash
10. The first microprocessor had a(n)________.
A : 1-bit data bus
B : 2-bit data bus
C : 4-bit data bus
D : 8-bit data bus
2. Which of the following is not a computer functional block?
A : Analog-to-digital converter
B : Central-processing unit
C : Memory
D : Input/output ports
3. A 20-bit address bus can locate ________.
A : 1,048,576 locations
B : 2,097,152 locations
C : 4,194,304 locations
D : 8,388,608 locations