Answer:
- import math
-
- def standard_deviation(aList):
- sum = 0
- for x in aList:
- sum += x
-
- mean = sum / float(len(aList))
-
- sumDe = 0
-
- for x in aList:
- sumDe += (x - mean) * (x - mean)
-
- variance = sumDe / float(len(aList))
- SD = math.sqrt(variance)
-
- return SD
-
- print(standard_deviation([3,6, 7, 9, 12, 17]))
Explanation:
The solution code is written in Python 3.
Firstly, we need to import math module (Line 1).
Next, create a function standard_deviation that takes one input parameter, which is a list (Line 3). In the function, calculate the mean for the value in the input list (Line 4-8). Next, use the mean to calculate the variance (Line 10-15). Next, use sqrt method from math module to get the square root of variance and this will result in standard deviation (Line 16). At last, return the standard deviation (Line 18).
We can test the function using a sample list (Line 20) and we shall get 4.509249752822894
If we pass an empty list, a ZeroDivisionError exception will be raised.
Answer:
By modifying the hidden form values that is in a local copy of the company web page
Explanation:
In a situation were the hacker successful change the price of the items he/she purchased through the web site of the company's in which the company web server as well as the company Oracle database were not compromised directly which means that the most likely method in which the attacker used to modified the sale price of the items he/she purchased was by modifying the HIDDEN FORM VALUE that was in the local copy of the company web page making it easy for the HIDDEN FORM VALUE to be vulnerable to the hacker because the hidden form value did not store the company server side information or data but only store the company software state information which is why HIDDEN FORM VALUE should not be trusted.
Answer:
The blocking system.
Explanation:
In order to avoid servers to replicate with each other, I should configure the blocking system of the first DHCP.
For example, if the first DHCP fails to respond, the second will get in place, however, I have to configure the first system that immediately that the second DHCP starts working, the first blocks its information and use.
By this way, there won´t be any duplicated actions or reponses.
The answer to this question is B.
