(a) What is the total capacity of the disk?
(b) What is the data transfer rate?
(c) What is the percentage of time the $$CPU$$ is required for this disk $${\rm I}/O$$ for byte-wise interrupts driven transfer?
(d) What is the maximum percentage of time the $$CPU$$ is held up for this disk $${\rm I}/O$$ for cycle-stealing $$DMA$$ transfer ?
(a) Consider a set of disk requests to read data from tracks $$32, 7, 45, 5$$ and $$10.$$ Assuming that the elevator algorithm is used to schedule disk requests, and the head is initially at track $$25$$ moving up (towards larger track numbers),
what is the total seek time for servicing the requests?
(b) Consider an initial set of $$100$$ arbitrary disk requests and assume that no new disk requests arrive while servicing these requests. If the head is initially at track $$0$$ and the elevator algorithm is used to schedule disk requests, what is the worst case time to complete all the requests?
Program P1()
{
x=10;
y=3;
func1(y,x,x);
print x;
print y;
}
func1(x,y,z)
{
y=y+4;
z=x+y+z;
}
Program P2
var n:int;
procedure W(var x:int)
begin
x=x+1;
print x;
end
procedure D
begin
var n:int;
n=3;
W(n);
end
begin \\begin P2
n = 10;
D;
end
If the language has dynamic scooping and parameters are passed by reference,
what will be printed by the program?