Answer:
Required code is given below:
Explanation:
def add_to_dict(dictt, key,value):
if key in dictt.keys():
print("Error. Key already exists.")
else:
dictt[key]=value
return dictt
def remove_from_dict(dictt,key):
try:
dictt[key]
dictt.pop(key, None)
return dictt
except KeyError:
print("No such key exists in the dictionary.")
def find_key(dictt,key):
try:
value=dictt[key]
print("Value: ", value)
except KeyError:
print("Key not found.")
Answer:
The fathers of the internet are Vinton Cerf and Robert Kahn
Explanation:
Vinton G. Cerf (Vint) was born in 1943 and is an American computer scientist. He researched at Stanford University on packet interconnection protocols and partnered with Robert Kahn in the design and development of the TCP/IP protocol.
Robert E. Kahn was born in 1938 and is an American engineer and computer scientist who worked with Vinton G. Cerf on the development of the TCP/IP protocol which is the crux of the internet today.
Among multiple achievements and awards, they have been awarded the Presidential Medal of Freedom by President Bush in 2005.
Answer:
The answer is "Option A".
Explanation:
The Dot matrix printer is also known as an impact matrix printer. It is a multi-part form printer because it prints data on paper. This printer uses a hammer and a ribbon printer, that shapes pictures from dots. and other options are not correct, that can be described as follows:
- In option B, daisy-wheel printer prints data on printer only one side that's it is not correct.
- In option C, the Inkjet printer is capable to print data in multi-part forms, but this printer does not data in continuous forms.
- In option D, the color printer allows you to print data in color format like images, graphs, and banner. It prints data only on one side, that's why it is not correct.
Answer:
a local or restricted communications network, especially a private network created using World Wide Web software.
Explanation:
