Ruby Networking Quiz

Question 1: Net::HTTP Basics

Which method would you use to make a simple GET request to 'https://api.example.com/users' using Net::HTTP?

Net::HTTP.get('api.example.com', '/users') Net::HTTP.get(URI('https://api.example.com/users')) Net::HTTP.request('https://api.example.com/users') Net::HTTP.fetch('https://api.example.com/users')

Correct Answer: B
Net::HTTP.get(URI('https://api.example.com/users')) is the correct way to make a simple GET request. The method accepts a URI object and handles the HTTPS connection automatically.

Question 2: TCP vs UDP

What is the main difference between TCP and UDP protocols?

TCP is faster, UDP is more reliable TCP is connection-oriented and reliable, UDP is connectionless and faster TCP uses encryption, UDP does not There is no significant difference

Question 3: TCPServer

What does the following code do?

server = TCPServer.new('localhost', 3000)
client = server.accept

Creates a server and immediately connects to a client Creates a server that listens on port 3000 and waits for a client connection Creates a server and sends data to port 3000 Creates a client connection to localhost:3000

Correct Answer: B
TCPServer.new creates a server that listens on the specified host and port. The accept method blocks until a client connects, then returns a socket representing the client connection.

Question 4: URI Parsing

Given the URL 'https://api.example.com:8080/v1/users?active=true#section1', what would URI.parse(url).port return?

443 8080 80 nil

Question 5: open-uri

Which is the correct way to open a URL with custom headers using open-uri?

URI.open(url, headers: {'User-Agent' => 'MyApp'}) URI.open(url, 'User-Agent' => 'MyApp') URI.open(url).headers('User-Agent' => 'MyApp') open(url, 'User-Agent' => 'MyApp')

Correct Answer: B
URI.open(url, 'User-Agent' => 'MyApp') is the correct syntax. Headers are passed as additional parameters to the open method, not as a nested hash.

Question 6: UDPSocket

What happens when you call send on a UDPSocket?

It establishes a connection and then sends data It sends data immediately without establishing a connection It waits for acknowledgment before returning It buffers the data for later transmission

Correct Answer: B
UDP is connectionless, so send transmits data immediately without establishing a connection. There's no guarantee the data will reach its destination or that you'll receive an acknowledgment.

Question 7: Query Parameters

How do you properly encode query parameters containing special characters for a URL?

URI.encode_www_form(params) CGI.escape(params) params.to_s URI.escape(params)

Correct Answer: A
URI.encode_www_form(params) properly encodes a hash of parameters into URL-encoded form data, handling special characters correctly. URI.escape is deprecated.

Question 8: Error Handling

Which exception should you catch when handling HTTP errors with open-uri?

Net::HTTPError OpenURI::HTTPError URI::HTTPError StandardError

Correct Answer: B
OpenURI::HTTPError is the specific exception raised by open-uri for HTTP errors (4xx and 5xx status codes). It provides access to the response body and status code.

Question 9: Socket Programming

What is the purpose of calling bind on a socket?

To connect to a remote server To associate the socket with a local address and port To close the socket connection To send data through the socket

Correct Answer: B
bind associates a socket with a specific local address and port number. This is typically used on server sockets to specify which address and port the server should listen on.

Question 10: Web Scraping Best Practices

Which of the following is NOT a best practice for web scraping?

Implementing rate limiting between requests Setting a proper User-Agent header Making requests as fast as possible to minimize scraping time Respecting robots.txt files

Ruby Language

Rails Framework

Production Ready