Machine Learning Quiz

When using BeautifulSoup for web scraping, which of the following would correctly extract all text within paragraph tags while preserving nested structure?

• soup.find_all('p').text

• soup.find('p').get_text()

• soup.find_all('p').get_text(strip=True)

• [p.get_text(strip=True) for p in soup.find_all('p')]

In the context of TF-IDF vectorization, what happens when a word appears in every document of the corpus?

• Its IDF value becomes 0

• Its IDF value becomes 1

• Its IDF value becomes infinity

• Its TF value becomes 0

Which collaborative filtering approach would be most appropriate for a new e-commerce site with minimal user interaction data but detailed product attributes?

• User-based collaborative filtering

• Item-based collaborative filtering

• Content-based filtering

• Matrix factorization

What's the primary issue with using requests.get() in a loop to scrape multiple pages rapidly?

• It will return incomplete HTML

• It might trigger rate limiting or IP blocking

• It cannot handle JavaScript content

• It will consume excessive memory

Which of the following NLP tasks is most suitable for identifying customer sentiment in product reviews?

• Named Entity Recognition

• Part-of-Speech Tagging

• Sentiment Analysis

• Text Summarization

In a recommendation system, what technique helps solve the "cold start" problem for new users?

• Collaborative filtering

• Content-based filtering

• Matrix factorization

• Deep learning

When implementing proxies for web scraping, which is NOT a valid consideration?

• Proxy rotation frequency

• Geographic location of proxies

• Browser JavaScript version

• Proxy response time

Which feature would be LEAST useful in a content-based movie recommendation system?

• Movie genre

• Movie release date

• Movie ID number

• Movie director

What is the main purpose of stemming in NLP?

• To remove stop words

• To reduce words to their root form

• To identify named entities

• To determine word frequency

In web scraping, what is the main advantage of using Selenium over BeautifulSoup?

• Faster parsing of HTML

• Lower memory usage

• Ability to handle dynamic JavaScript content

• Better CSS selector support