	Attempt	Time	Score
LATEST	Attempt 1	6 minutes	100 out of 100

What method allows you to check for I/O completion on more than one socket?

.connect()

Correct!

.select()

.recv()

None of the above

What’s the most common type of socket applications?

Unix domain socket applications

Server-server applications

Correct!

Client-server applications

None of the above

Why would an application server use the loopback interface to communicate with its own private database?

To allow other hosts on the network to connect to it

Correct!

For security and isolation from the external network

To connect to an external network

None of the above

What does Python’s socket module provide an interface to?

The SMTP protocol

Correct!

The Berkeley sockets API

The HTTP protocol

None of the above

Consider the following Python script for a simple client:

import socket
HOST = "127.0.0.1"
PORT = 65432
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    s.sendall(b"Hello, world")
    data = s.recv(1024)
print(f"Received {data!r}")

What does this script do? (Select all that apply.)

It listens for incoming connections from clients.

Correct!

It receives a reply from the server and prints it.

Correct!

It sends a message to the server.

Correct!

It connects to a server at the specified IP address and port.

None of the above

Quiz 4 - Sockets

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