27 Lecture - Interrupt Driven I/O

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27 Lecture

CS501

Midterm & Final Term Short Notes

Interrupt Driven I/O

Interrupt Driven I/O is a technique used in computer systems to manage input/output operations. In this approach, the device generates an interrupt signal to the CPU, indicating that it is ready to send or receive data. The CPU stops its current


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  1. What is Interrupt Driven I/O? A) A technique to prevent I/O operations from interfering with CPU B) A technique to improve system performance by allowing CPU to perform other tasks while waiting for I/O operations C) A technique to speed up I/O operations by reducing the overhead of context switching D) A technique to eliminate the need for interrupt signals Answer: B What happens when a device generates an interrupt signal in Interrupt Driven I/O? A) The device stops working B) The CPU stops its current task and starts executing the interrupt service routine C) The CPU continues its current task and ignores the interrupt signal D) The device's data is lost Answer: B What is the purpose of the interrupt service routine in Interrupt Driven I/O? A) To communicate with the device and transfer data between the device and CPU's memory B) To stop the CPU's current task and start executing the interrupt signal C) To ignore the interrupt signal and continue the CPU's current task D) To prevent I/O operations from interfering with CPU Answer: A Which of the following statements is true about Interrupt Driven I/O? A) It eliminates the overhead of context switching B) It reduces the need for interrupt signals C) It can improve system performance D) It slows down I/O operations Answer: C What is the disadvantage of Interrupt Driven I/O? A) It introduces overhead due to context switching and interrupt handling B) It cannot improve system performance C) It cannot prevent I/O operations from interfering with CPU D) It can only be used with certain types of devices Answer: A In Interrupt Driven I/O, what does the CPU do when it receives an interrupt signal? A) It stops its current task and starts executing the interrupt service routine B) It continues its current task and ignores the interrupt signal C) It stops working D) It sends an interrupt signal to the device Answer: A What is the role of the device in Interrupt Driven I/O? A) To generate an interrupt signal when it is ready to send or receive data B) To execute the interrupt service routine C) To prevent I/O operations from interfering with CPU D) To eliminate the overhead of context switching Answer: A Which of the following can Interrupt Driven I/O improve? A) Memory access time B) Disk latency C) Network bandwidth D) CPU clock speed Answer: B How does Interrupt Driven I/O improve system performance? A) By preventing I/O operations from interfering with CPU B) By reducing the need for interrupt signals C) By eliminating the overhead of context switching D) By allowing CPU to perform other tasks while waiting for I/O operations Answer: D What is the benefit of using Interrupt Driven I/O? A) It reduces the need for interrupt signals B) It can prevent I/O operations from interfering with CPU C) It eliminates the overhead of context switching D) It improves system performance by allowing CPU to perform other tasks while waiting for I/O operations Answer: D


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Midterm & Finalterm Prepration
Past papers included

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  1. What is the main purpose of Interrupt Driven I/O? Answer: The main purpose of Interrupt Driven I/O is to improve system performance by allowing the CPU to perform other tasks while waiting for I/O operations to complete. How does Interrupt Driven I/O handle I/O operations? Answer: Interrupt Driven I/O handles I/O operations by allowing the device to generate an interrupt signal to the CPU, indicating that it is ready to send or receive data. The CPU then stops its current task and starts executing the interrupt service routine. What is an interrupt service routine? Answer: An interrupt service routine (ISR) is a program that is executed when an interrupt signal is received. The ISR communicates with the device and transfers data between the device and the CPU's memory. What is the role of the device in Interrupt Driven I/O? Answer: The role of the device in Interrupt Driven I/O is to generate an interrupt signal when it is ready to send or receive data. What are the advantages of Interrupt Driven I/O? Answer: The advantages of Interrupt Driven I/O are improved system performance, better responsiveness, and reduced CPU usage. How does Interrupt Driven I/O improve system performance? Answer: Interrupt Driven I/O improves system performance by allowing the CPU to perform other tasks while waiting for I/O operations to complete. What is the disadvantage of Interrupt Driven I/O? Answer: The disadvantage of Interrupt Driven I/O is that it introduces overhead due to context switching and interrupt handling. Can Interrupt Driven I/O be used with any type of device? Answer: Yes, Interrupt Driven I/O can be used with any type of device that generates an interrupt signal. How does Interrupt Driven I/O reduce CPU usage? Answer: Interrupt Driven I/O reduces CPU usage by allowing the CPU to perform other tasks while waiting for I/O operations to complete, rather than wasting cycles polling for I/O completion. What is the difference between Interrupt Driven I/O and polling-based I/O? Answer: In Interrupt Driven I/O, the device generates an interrupt signal to the CPU, whereas in polling-based I/O, the CPU continuously polls the device to check if it is ready to send or receive data. Interrupt Driven I/O is generally more efficient than polling-based I/O.

Interrupt Driven I/O is a technique used in computer systems to handle input/output operations. In this technique, the device generating I/O signals an interrupt to the processor to inform it that data is ready for transfer. This technique allows the processor to perform other tasks while waiting for I/O operations to complete. In Interrupt Driven I/O, the device generates an interrupt signal when it is ready to send or receive data. The CPU then stops its current task and starts executing the interrupt service routine (ISR). The ISR communicates with the device and transfers data between the device and the CPU's memory. The main advantage of Interrupt Driven I/O is that it improves system performance. By allowing the CPU to perform other tasks while waiting for I/O operations to complete, the overall system performance is improved. Interrupt Driven I/O also reduces CPU usage by allowing the CPU to perform other tasks while waiting for I/O operations to complete, rather than wasting cycles polling for I/O completion. However, Interrupt Driven I/O does introduce overhead due to context switching and interrupt handling. Each time an interrupt is generated, the CPU must stop its current task and execute the ISR. This context switching can slow down the system if there are too many interrupts generated. Interrupt Driven I/O can be used with any type of device that generates an interrupt signal. However, it is particularly useful for devices that generate a large amount of data, such as network adapters or hard drives. In contrast to Interrupt Driven I/O, polling-based I/O involves the CPU continuously checking the device to see if it is ready to send or receive data. This technique can result in wasted CPU cycles and reduced system performance. Interrupt Driven I/O is generally more efficient than polling-based I/O. In summary, Interrupt Driven I/O is a technique used in computer systems to handle input/output operations. It improves system performance and reduces CPU usage by allowing the CPU to perform other tasks while waiting for I/O operations to complete. However, it does introduce overhead due to context switching and interrupt handling.

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