Answer:
The concealment cipher.
Explanation:
A concealment cipher also known as null cipher can be defined as an obsolete encryption format that typically involves the mixture of plaintext with non-cipher elements. This ultimately implies that, the plaintext is hidden in another message through encryption.
The concealment cipher is based on the clues of the physical factors, rather than the hardware or a software cryptosystem.
Basically, the concealment cipher is solely dependent on the clues of the physical factors that mainly affects the sender and receiver in a communication system.
Answer:
Option b if month in ["May", "June", "July", "August"] and not num_finals:
Explanation:
The if statement in the option b doesn't meet the objective to check if num_finals is zero. It just use a not operator which is not relevant here. The num_finals is an integer and therefore to check if num_finals is zero, the correct statement should be num_finals == 0 The "==" is an equality operator to check if a left value is equal to the right value. The rest of the three options are correct as they meet the checking requirements.
Answer:
def main():
n = int(input('Enter the value of the variable n:'))
k=2;
totalSum = 0
print('The list of the prime numbers are as follows:')
while k <= n:
totalSum = totalSum+is_prime(k)
k=k+1
print('Total sum of the prime numbers:',totalSum)
def is_prime(k):
primeNumber = 0
i=1
while i<=int(k):
if (k % i) == 0:
primeNumber = primeNumber + 1
i=i+1
if(primeNumber==2):
print(k)
return k;
else:
return 0;
main()
Explanation:
- Run the while loop until k is less than n.
- Determine if the variable k is prime then add it to the totalSum variable.
- Increment the value of k by 1.
- Create a function isPrime to check whether the number is prime or not by determining the factors of k which can be found using the modulus operator.
-
Call the main function at the end.
Answer:
once per month
Explanation:
The correct answer is - once per month
Reason -
Probability of 1 failure of 1000 hard disk = 750,000/1000 = 750 hrs
So,
750/24 = 31.25 days
⇒ approximately one in a month.
