Web Scraping and Data Visualization Quiz

Which Python library is most commonly used for parsing HTML and extracting data from web pages?

• requests

• BeautifulSoup

• matplotlib

• numpy

What is the primary purpose of the `requests` library in web scraping?

• Parsing HTML content

• Sending HTTP requests and fetching web page content

• Creating plots and charts

• Counting word frequency

What does the `get_text(strip=True)` method of a BeautifulSoup tag object do?

• Extracts only links from the tag

• Extracts text while removing surrounding whitespace

• Converts the tag into a dictionary

• Returns the tag attributes

Which of the following can be used to extract all `

` and `

` tags from a webpage using BeautifulSoup?

• soup.extract(['h2','h3'])

• soup.find_all(['h2','h3'])

• soup.find('h2','h3')

• soup.get('h2','h3')

In text preprocessing, which regular expression pattern removes all non-alphabetic characters?

• r'[a-zA-Z]'

• r'[^a-zA-Z\s]'

• r'[0-9]'

• r'[^a-z]'

Which Python class is used to generate a WordCloud visualization?

• WordGenerator

• WordMap

• WordCloud

• WordPlot

What does `plt.xticks(rotation=45)` do in matplotlib?

• Rotates the entire chart

• Rotates x-axis labels by 45 degrees

• Changes x-axis label font

• Shifts bars horizontally by 45 units

Which function from `collections.Counter` returns the top 10 most frequent words?

• Counter().most_common()

• Counter().top(10)

• Counter().get_most(10)

• Counter().max(10)

In a bar chart visualization of word frequencies, what is typically shown on the x-axis?

• Word counts

• Word positions

• Words (categories)

• Font sizes

Which of the following commands saves a WordCloud as an image file?

• save_wordcloud('file.png')

• wordcloud.save('file.png')

• wordcloud.to_file('file.png')

• plt.save('file.png')