Quiz 04 - Networked Programs

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1. Which of the following best describes the difference between TCP and UDP?

• A) TCP is unreliable, and UDP is reliable.
• B) TCP is connection-oriented, while UDP is connectionless.
• C) TCP is faster than UDP for video streaming.
• D) TCP does not check for packet loss, while UDP does.

2. What happens if a TCP packet is lost during transmission?

• A) The receiver sends an acknowledgment, and transmission continues.
• B) The receiver ignores the missing packet.
• C) The sender retransmits the lost packet.
• D) The receiver reconstructs the lost packet using data from other packets.

3. When establishing a connection, the three-way handshake process in TCP involves which sequence?

• A) SYN → SYN-ACK → ACK
• B) ACK → SYN-ACK → SYN
• C) SYN → ACK → SYN-ACK
• D) SYN-ACK → ACK → SYN

4. What would be the output of the following Python script?

• A) It fetches a webpage from www.example.com.
• B) It establishes a TCP connection but fails due to a wrong port number.
• C) It prints HTTP 200 OK response if the server is running on port 8080.
• D) It throws a syntax error due to recv(1024).

5. Which of the following statements about urllib.request.urlopen() is true?

• A) It only works with HTTP GET requests.
• B) It automatically follows redirects by default.
• C) It requires manual decoding of responses.
• D) It does not support HTTPS connections.

6. In web scraping, what is the primary advantage of using BeautifulSoup over regex-based parsing?

• A) BeautifulSoup can execute JavaScript on the page.
• B) BeautifulSoup provides a structured way to parse HTML and XML.
• C) Regex is more efficient than BeautifulSoup.
• D) BeautifulSoup is built into Python by default.

7. What will happen if you try to scrape a website that has robots.txt restrictions against your bot?

• A) The script will automatically stop.
• B) The website will return a 403 Forbidden response.
• C) You might be violating the website’s terms of service.
• D) The script will crash immediately.

8. Why is UTF-8 preferred over ASCII in network communication?

• A) UTF-8 is more memory-efficient than ASCII.
• B) UTF-8 supports a wider range of characters globally.
• C) UTF-8 is the default encoding in all web browsers.
• D) ASCII is deprecated in modern programming.