26 Lecture - Programmed I/O

  1. Home
  2. Courses
  3. Advance Computer Architecture
  4. 26 Lecture

26 Lecture

CS501

Midterm & Final Term Short Notes

Programmed I/O

Programmed I/O, or PIO, is a method of input/output data transfer in computer systems. In PIO, the CPU directly controls the data transfer between the peripheral device and memory, without the use of specialized hardware. This method is slower t


Important Mcq's
Midterm & Finalterm Prepration
Past papers included

Download PDF

  1. What is Programmed I/O? a) A method of data transfer between CPU and memory b) A method of data transfer between peripheral devices c) A method of data transfer using specialized hardware Answer: a What is the main advantage of Programmed I/O? a) It is faster than other input/output methods b) It is more reliable than other input/output methods c) It does not require specialized hardware Answer: c In Programmed I/O, who controls the data transfer? a) The peripheral device b) The CPU c) The specialized hardware Answer: b Which method of input/output transfer is faster than Programmed I/O? a) Direct Memory Access (DMA) b) Interrupt-driven I/O c) Both of the above Answer: a What type of data transfer is Programmed I/O commonly used for? a) Large data transfers b) Real-time data transfers c) Small data transfers Answer: c Which component is responsible for controlling the data transfer in Programmed I/O? a) The DMA controller b) The CPU c) The interrupt controller Answer: b Which of the following is a disadvantage of Programmed I/O? a) It requires specialized hardware b) It is slower than other input/output methods c) It cannot handle real-time data transfers Answer: b What is the main benefit of using Programmed I/O? a) It is more efficient than other input/output methods b) It is less expensive than other input/output methods c) It can be used with simple devices that do not require specialized hardware Answer: c Which type of device is commonly used with Programmed I/O? a) External storage devices b) Printers c) Network devices Answer: b Which of the following is an example of an input/output method that uses specialized hardware? a) Interrupt-driven I/O b) Direct Memory Access (DMA) c) Programmed I/O Answer: b



Subjective Short Notes
Midterm & Finalterm Prepration
Past papers included

Download PDF

  1. What is Programmed I/O? Answer: Programmed I/O is a method of data transfer in which the CPU directly controls the data transfer between the peripheral device and memory, without the use of specialized hardware. What are the advantages of Programmed I/O? Answer: The main advantage of Programmed I/O is that it does not require specialized hardware, making it an ideal method for simple devices. What are the disadvantages of Programmed I/O? Answer: The main disadvantage of Programmed I/O is that it is slower than other input/output methods, such as DMA. What types of devices are commonly used with Programmed I/O? Answer: Programmed I/O is commonly used with simple devices, such as printers. What is the role of the CPU in Programmed I/O? Answer: The CPU controls the data transfer between the peripheral device and memory in Programmed I/O. Can Programmed I/O handle real-time data transfers? Answer: No, Programmed I/O is not well-suited for real-time data transfers. What is the main benefit of using Programmed I/O? Answer: The main benefit of using Programmed I/O is that it can be used with simple devices that do not require specialized hardware. How does Programmed I/O compare to other input/output methods in terms of speed? Answer: Programmed I/O is slower than other input/output methods, such as DMA. What type of data transfer is Programmed I/O commonly used for? Answer: Programmed I/O is commonly used for small data transfers. What is the main disadvantage of Programmed I/O compared to other input/output methods? Answer: The main disadvantage of Programmed I/O is its slower data transfer rate, which can be a problem when dealing with large data transfers.

Programmed I/O (PIO) is a method of input/output data transfer in computer systems. In this method, the CPU directly controls the data transfer between the peripheral device and memory, without the use of specialized hardware. PIO is commonly used with simple devices that do not require the high-speed transfer rates provided by other input/output methods, such as Direct Memory Access (DMA). The main advantage of Programmed I/O is that it does not require specialized hardware, making it an ideal method for simple devices such as printers. However, the main disadvantage of Programmed I/O is that it is slower than other input/output methods, which can be a problem when dealing with large data transfers. In Programmed I/O, the CPU is responsible for controlling the data transfer between the peripheral device and memory. This makes it a relatively simple method of data transfer, but also one that is not well-suited for real-time data transfers. Programmed I/O is commonly used for small data transfers, such as those required for printing a document. However, it is not well-suited for larger data transfers, such as those required for video or audio streaming. For these types of data transfers, other input/output methods, such as DMA, are preferred. Overall, Programmed I/O is a useful method of data transfer for simple devices that do not require high-speed transfer rates. While it may not be as fast as other input/output methods, it remains a viable option for certain applications.

Course Lectures