Answer:
Internal:
#CPU; That retrieves &execute instructions.
#Modem; Modulates& demodulates electric signals.
#RAM;Gives application a place to store &access data on a short time periods.
External:
#Mouse; Transmits commands and controlling movements.
#Moniter; Device used to display video output from computer.
#Printer; Accepts text, graphics to the paper.
Explanation:
Hope this will help you.
firstly we have to initialize the variable, means to give variable a value and then print the statement
string = "fahadisahadam"
print(string[:3]+"..."+string[-3:])
string is a data type that contains two or more characters.
means the string is fahadisahadam so the print will print first three characters. follow by three periods(...) and then last three characters.
The output will be:
fah...dam
Answer:
Secure the personal information with complex multi-factor authentication and configure intrusion detection and prevention and a firewall.
Explanation:
Multi-factor authentication is a method of securing a client's personal information from the client's side to the data centre. It uses more than one security processes not policies. There key be three authentications process like a password, security token and biometrics or two authentications like password and biometrics or token.
The firewall and intrusion detection and prevention are vulnerability preventive method to detect and stop cyber attacks.
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:
Written in Python
for num in range(1,1001):
sum=0
for j in range(1,num+1):
if num%j==0:
sum = sum + j
if num == sum:
print(str(num)+" is a perfect number")
Explanation:
This line gets the range from 1 to 1000
for num in range(1,1001):
This line initializes sum to 0 for each number 1 to 1000
sum=0
This line gets the divisor for each number 1 to 1000
for j in range(1,num+1):
This following if condition line checks for divisor of each number
<em> if num%j==0:
</em>
<em> sum = sum + j
</em>
The following if condition checks for perfect number
if num == sum:
print(str(num)+" is a perfect number")
