I think it is the model ET-2. Not quite sure.
I think it might be Heading & Border
Answer:
"ArithmeticException" is the correct answer for the above question.
Explanation:
Missing Information : The above question does not hold that "what is the output of the program".
- The above question has a class that holds the two functions one function is the main function which calls the other function in a try-catch block.
- The method function holds one run time exception which is 1/0 which is an arithmetic exception.
- It can be handle by the help of an arithmetic class object which is defined in the first catch block.
- Hence the print function of this catch is executed and prints "ArithmeticException".
Answer:
i. This value was not accepted because we have 12 months and not 13.
ii. This is because the user entered the value for the day as value for the month.
Explanation:
i. Why was this not accepted?
This value was not accepted because we have 12 months and not 13. The user entered a value that was above the maximum value registered for the number of months in a year- which is 12.
ii. Why do you think this error occurred
This is because the user entered the value for the day as value for the month.
This could be because the user uses a date system different from that of the program.
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);
}