IP addresses and domain names in Intro to Computing - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the IP address of a website using Python's socket module.

Intro to Computing

import socket
ip = socket.gethostbyname([1])
print(ip)

Drag options to blanks, or click blank then click option'

Alocalhost

Bexample.com

C"localhost"

D"example.com"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the domain name string.

Using a variable name without defining it.

The gethostbyname function requires the domain name as a string, so it must be enclosed in quotes.

2fill in blank

medium

Complete the code to split an IP address string into its four parts.

Intro to Computing

ip = "192.168.1.1"
parts = ip.[1](".")
print(parts)

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Asplit

Breplace

Cjoin

Dfind

Attempts:

3 left

💡 Hint

Common Mistakes

Using join which combines strings instead of splitting.

Using replace which changes characters but does not split.

The split method breaks a string into parts based on the separator, here the dot ..

3fill in blank

hard

Fix the error in the code that checks if an IP address is valid by counting its parts.

Intro to Computing

ip = "10.0.0.256"
parts = ip.split(".")
if len(parts) [1] 4:
    print("Valid IP")
else:
    print("Invalid IP")

Drag options to blanks, or click blank then click option'

A==

B!=

C=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using = instead of == causes syntax errors.

Using != reverses the logic.

To check if the IP address has exactly 4 parts, use the equality operator ==.

4fill in blank

hard

Fill both blanks to create a dictionary mapping domain names to their IP addresses.

Intro to Computing

import socket

domains = ["example.com", "localhost"]
ip_map = {domain: [1] for domain in domains if domain [2] "localhost"}
print(ip_map)

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Asocket.gethostbyname(domain)

B==

C!=

Ddomain

Attempts:

3 left

💡 Hint

Common Mistakes

Using == instead of != changes the filter logic.

Not calling the function to get IP addresses.

The dictionary comprehension gets the IP for each domain except 'localhost' by checking if domain is not equal (!=) to 'localhost'.

5fill in blank

hard

Fill all three blanks to create a list of IP addresses from a list of domain names.

Intro to Computing

import socket

domains = ["example.com", "localhost", "openai.com"]
ips = [[1] for [2] in domains if [3] != "localhost"]
print(ips)

Drag options to blanks, or click blank then click option'

Asocket.gethostbyname(domain)

Bdomain

Dsocket.gethostbyname(dom)

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Calling the function with wrong variable names.

The list comprehension calls socket.gethostbyname(domain) for each domain in domains, skipping 'localhost'.