Please fast because i need answer before 16:00

QUESTION 4

1. The OS peripheral devices are categorized into 3: Dedicated, Shared, and Virtual. Explain the differences among them and provide an example of devices for each category.

(6 marks)

2. The queue has the following requests with cylinder numbers as follows:

98, 183, 37, 122, 14, 124, 65, 67

Assume the head is initially at cylinder 56.

Based on the information given above, discuss the following disk scheduling algorithm. You are required to draw a diagram to support your answer.

1. First Come First Serve

(5 marks)

2. Shortest Seek Time First (SSTF)

(5 marks)

3. SCAN algorithm

(4 marks)

(Total: 20 marks)