Answer:
Purposes of Data Layer, in the Layered model for web applications are as following:-
1. The data Layer,is the third layer and it takes care of the all the operations concerning the database level.
2. This data layer gets a command from the application layer to send a query to the database and will process this command according to the type of database that is used.
3. It will ensure that the correct connections to the database are set.
4. It is represented by the Database.
Answer:
In Python:
import os.path
from os import path
fname = input("Filename: ")
if path.exists(fname):
with open(fname) as file_in:
lines = []
for line in file_in:
lines.append(line.rstrip('\n'))
f = open("stat.txt","r+")
f.truncate(0)
f = open("stat.txt", "a")
f.write("Names\tTotal\tSubjects\tAverage\n")
for i in range(len(lines)):
rowsum = 0; count = 0
nm = lines[i].split()
for j in nm:
if (j.isdecimal()):
count+=1
rowsum+=int(j)
average = rowsum/count
f.write(nm[0]+"\t %3d\t %2d\t\t %.2f\n" % (rowsum, count, average))
f.close()
else:
print("File does not exist")
Explanation:
See attachment for explanation where comments were used to explain each line
Answer:
The correct option are:-
a) The socket type that will be used
d) The socket family that will be used
Explanation:
The socket() method generates the unbound socket in a networking domain and returns a descriptor of the register, which can be used in subsequent socket function calls.
The socket() method takes three arguments:
Domain:- The domain for which a socket is to be built is defined.
Type:- The socket type to be generated is defined.
Protocol:- It specifies a common socket protocol to use. The protocol setting of 0 causes socket() to use a default uninstalled protocol that is suitable for the socket type requested.
Answer:
B. style=text-align: right
Explanation:
text-align is a CSS property having 5 types of values. Each of values define below.
left - Aligns content to left.
right - Aligns content to right.
center - Centers the content.
justify - Depends on the width of the content, it will align itself to both left and righ
inherit - It specifies the the value of text-align should be taken from parent element.
Answer:
attenuation
Explanation:
Based on the information provided within the question it can be said that the phenomenon that is being described in this scenario is known as attenuation. In the context of physics, this refers to the gradual loss of intensity of something when traveling through a medium. Which in this case would be the data signals travelling through the cables.
