I/O Interfacing for Microprocessors Quiz

What is the primary role of an I/O port in a microprocessor system?

• To perform arithmetic calculations

• To interface with external peripherals and devices

• To manage memory operations

• To control the power supply

Which of the following is a common method of interfacing I/O devices with a microprocessor?

• Direct Memory Access (DMA)

• Memory-Mapped I/O

• Cache Memory

• Multiprocessing

In an I/O interfacing scheme, what does 'Polling' refer to?

• Continuously checking the status of an I/O device

• Using interrupts to handle I/O requests

• Synchronizing data transfer between the microprocessor and memory

• Setting up direct connections between devices

What does an interrupt-driven I/O system enable the microprocessor to do?

• To automatically adjust the clock speed

• To transfer data without CPU intervention

• To perform other tasks while waiting for an I/O operation to complete

• To increase memory bandwidth

Which signal is commonly used to indicate that a peripheral device is ready for data transfer?

• Write (WR)

• Read (RD)

• Interrupt Request (IRQ)

• Chip Select (CS)

What is the function of a buffer in an I/O interfacing system?

• To increase the speed of the microprocessor

• To temporarily store data during I/O operations

• To convert analog signals to digital

• To manage the power supply to I/O devices

What is the main advantage of using Direct Memory Access (DMA) for I/O operations?

• It reduces the complexity of memory addressing

• It allows the CPU to perform other tasks while I/O operations are being handled

• It eliminates the need for I/O interrupts

• It simplifies the I/O interfacing hardware

Which type of I/O interfacing uses dedicated instructions to communicate directly with I/O ports?

• Memory-Mapped I/O

• Port-Mapped I/O

• Direct Memory Access (DMA)

• Programmed I/O

What is the purpose of the 'Handshake' protocol in I/O interfacing?

• To synchronize data transfer between devices

• To manage the power levels of I/O devices

• To increase the speed of data transmission

• To adjust the clock frequency of the microprocessor

Which I/O interfacing method involves the microprocessor waiting for an interrupt signal to initiate data transfer?

• Programmed I/O

• Direct Memory Access (DMA)

• Interrupt-Driven I/O

• Memory-Mapped I/O