Python Interview Questions on Python Internet Communication

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We have compiled most frequently asked Python Interview Questions which will help you with different expertise levels.

Python Interview Questions on Python Internet Communication

Question 1:
What are some supported socket communications protocol families?
Answer:
AF_INET (IPV4, TCP, UDP), AF_INET6 (IPV6, TCP, UDP), AF_UNIX

Question 2:
What are some socket types in Python?
Answer:
SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_RDM, SOCK_SEQPACKET

Question 3:
Illustrate opening a server side socket for incoming packets.
Answer:
import socket
mySock = socket.socket.(AFJNET, SOCK_STREAM)
mySock.bind((interfaceName, portNumber))
mySock.listen(3)

Question 4:
Illustrate opening a client-side socket for sending data.
Answer:
import socket
mySock = socket.socket.(AFJNET, SOCK_STREAM)
my Sock ,connect((interfaceName, portNumber))
mySock.send(data)

Question 5:
What module is used to send email?
Answer:
smtplib.

Question 6:
Illustrate connecting to a mail server, in preparation for sending an email.
Answer:
import smtplib
mySMTP = smtplib.SMTP(‘mail.example.org’)

Question 7:
Illustrate sending an email, then closing the connection.
Answer:
import smtplib
mySMTP = smtplib.SMTP(‘mail.example.org’)
myResult = mySMTP.sendmail(‘me@example.org’,
‘you@example.org’, message)
mySMTP.quit( )

Question 8:
What module is used to retrieve email from a server?
Answer:
poplib.

Question 9:
Illustrate retrieving the number of messages available on a mail server.
Answer:
Import poplib .
myPOP = poplib.POP3(‘mail.example.org’)
mPOP.user(“Me@example.org’)
mPOP.pass_(“myPassword”)
myMessageCount = len(mPOP.list()[l])

Question 10:
What module is used to support file transfers?
Answer:
ftplib.

Question 11:
Illustrate opening a FTP connection.
Answer:
import ftplib
myFTP = ftplib.FTP(/ftp.example.org,/ ‘anonymous’, ‘myemail@example.org’)

Question 12:
What method is used to retrieve a list of files on an active FTP connection?
Answer:
•dir( )

Question 13:
Illustrate using FTP to retrieve a file and write it to the local disk.
Answer:
import ftplib
myFTP = ftplib.FTP(‘ftp.example.org’, ‘anonymous’,
‘myemail@example.org’)
myFile = openC’localfile.txt”, “wb”)
myFTP.retbinaryCRETR remotefile.txt’, myFile.write)
myFTP.quit( ) .
myFile.close( )

Question 14:
What happens if the .quit() method is not called on FTP connections.
Answer:
A resource leak can occur if multiple FTP connections are opened but never closed.

Question 15:
Illustrate retrieving a list of files from an FTP server
Answer:
import ftplib
myFTP = ftplib.FTP(ftp.example.org’, ‘anonymous’,
‘myemail@example. org’)
myFileList = myFTP.dirO
print myFileList
myFTP.quit()

Question 16:
What does the SOCK_STREAM socket type signify?
Answer:
This is a TCP Socket type.

Question 17:
What does the SOCK_DGRAM signify?
Answer:
This is a UDP socket type.

Question 18:
How is the .shutdown method used?
Answer:
.shutdownO is called before .close to flush buffers and ensure a timely shutdown of the connection. It can be called using SHUTRD, SHUT_WR or SHUT_RDWR to end receiving, sending, or both.

Question 19:
What does socket.accept() return?
Answer:
The conn and address objects. Conn is a new socket object able to send or receive data, and the address object is the address of the remote host.

Question 20:
How is the remote address of a socket returned?
Answer:
Using the .getpeernameQ method of the connected socket.