Why understanding the web empowers users in Intro to Computing - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the main part of a web address.

Intro to Computing

url = 'https://www.example.com'
main_part = url.split('[1]')[1]
print(main_part)

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

A://

B//

C.com

Dwww

Attempts:

3 left

💡 Hint

Common Mistakes

Using '//' instead of '://' causes wrong splitting.

The code splits the URL at '://', so the main part is after this.

2fill in blank

medium

Complete the code to check if a web address starts with 'https'.

Intro to Computing

url = 'https://secure.site'
if url.[1]('https'):
    print('Secure connection')

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

Acontains

Bendswith

Cstartswith

Dfind

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'contains' or 'find' does not check the start specifically.

The startswith method checks if the string begins with the given text.

3fill in blank

hard

Fix the error in the code that extracts the domain name from a URL.

Intro to Computing

url = 'http://openai.com'
domain = url.split('[1]')[1]
print(domain)

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

A://

Bhttp://

Cwww.

D.com

Attempts:

3 left

💡 Hint

Common Mistakes

Splitting by 'http://' causes the first part to be empty.

Splitting by '://' correctly separates the protocol from the domain.

4fill in blank

hard

Complete the code to create a dictionary of web pages and their status codes.

Intro to Computing

pages = ['home', 'about', 'contact']
status_codes = {page: 200 for page in pages if page [1] 'home'}

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

A:

B==

C!=

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of ':' in dictionary comprehension.

Using '==' instead of '!=' in the condition.

The dictionary comprehension uses ':' to map keys to values and '!=' to filter out 'home'.

5fill in blank

hard

Fill all three blanks to filter and transform a list of URLs.

Intro to Computing

urls = ['http://site1.com', 'https://site2.com', 'ftp://site3.com']
secure_sites = [url[1] for url in urls if url.[2]('https') and url.[3]('.com')]

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

A[8:]

Bstartswith

Cendswith

D[7:]

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong slice index.

Using 'contains' instead of 'startswith' or 'endswith'.

We slice from index 8 to remove 'https://' prefix, check if URL starts with 'https', and ends with '.com'.