In the 4-out-of-5 barrier problem (4 processes must reach their barriers before they can continue), the solution is to put V(S); P(S); V(S) before each barrier. Then what is the initial value of the semaphore? O-1 01 O-3 O-2 O 0 O-4

explain this program  bus1:mov ax,400add amount, axmov dx,0mov bx,10mov cx,0l222:div bxpush dxmov dx,0mov ah,0inc cxcmp ax,0jne l222l333:pop dxadd dx,48mov ah,2int 21hloop l333;mov am3,amount inc countinc bjmp while_jmp end_ recrd procmov dx,offset msg7mov ah,9int 21h ; print here the whole amountmov ax, amount mov dx,0mov bx,10mov cx,0

Vidyadhar, Rodika, and Manoj write code for a system that requires 4 modules.  Each module takes an exponential amount of time to complete with mean 3.0 days.  Once a coder is finished with a module, he/she starts another, but only one coder can work on a module.  Let {X(t), t >=0} be the CTMC describing the number of modules remaining to code. Show the rate diagram for X Show the Q matrix

Q3: Suppose there is a processing unit composed by CPU and I/O component. For a specific task, CPU takes 5 second to finish the execution and I/O takes 2 second to process. The communication time between CPU and I/O can be elimiate under this circumstance. Execution Time 7 second 5second 2 second CPU time I/O time If CPU time decreases by 25% per year for 3 years and I/O time decreases by 20% per year 1) How many times faster is this program after 3 years? 2) What percentage of new time is I/O? and what percentage of new time is CPU?