Answer:
17%
Explanation:
Given parameters:
Cost price of liquor = $4000
Total sale = $24000
Unknown:
Percentage cost of sale for liquor = ?
Solution:
To find the percentage cost of sale;
%Cost of sale of liquor = 
x 100
Input the variables;
%Cost of sale of liquor = 
x 100 = 16.67% = 17%
Answer:
Explanation:
Following are the Semaphores:
Customers: Counts waiting customers;
Barbers: Number of idle barbers (0 or 1)
mutex: Used for mutual exclusion.
Cutting: Ensures that the barber won’t cut another customer’s hair before the previous customer leaves
Shared data variable:
count_cust: Counts waiting customers. ------------copy of customers. As value of semaphores can’t access directly.
// shared data
semaphore customers = 0; semaphore barbers = 0; semaphore cutting = 0; semaphore mutex = 1;
int count_cust= 0;
void barber() {
while(true) { //shop is always open
wait(customers); //sleep when there are no waiting customers
wait(mutex); //mutex for accessing customers1
count_cust= count_cust-1; //customer left
signal(barbers);
signal(mutex);
cut_hair();
}
}
void customer() {
wait(mutex); //mutex for accessing count_cust
if (count_cust< n) {
count_cust= count_cust+1; //new customer
signal(customers); signal(mutex);
wait(barbers); //wait for available barbers get_haircut();
}
else { //do nothing (leave) when all chairs are used. signal(mutex);
}
}
cut_hair(){ waiting(cutting);
}
get_haircut(){
get hair cut for some time; signal(cutting);
}
Answer: Multitasking is the ability of the operating system by which a processor is able to process multiple task at the same time.
Cooperative multitasking is non preemptive multitasking where the processor is assigned to a single process and does not preempt until it completes its jobs or moves to a waiting state.
Explanation:
In Multitasking jobs are executed at a faster rate than as many jobs or tasks can be assigned to the processor at the same time.
In cooperative multitasking due to the non preemptive nature a single job could be assigned to the cpu at a time.
Answer:
For undirected graph n(n-1) for directed graph 
Explanation:
The maximum number of edges for a undirected graph is given by 
, where n is number of vertices
The maximum number of edges in directed graph is given by , where n is number of vertices
The maximum number of edges is greater in undirected graph than directed graph
Answer:
True.
Explanation:
A Central office or local office in Metropolitan cities is a building or an office where the phone lines coming from a home or office are terminated and connected to a bigger switching system.Central office got the switching equipment which holds the ability to switch calls long-distances or locally.Hence we conclude that the answer is True.
