Which method is used to convert a hash into an array of key-value pairs in Ruby?

What is metaprogramming in Ruby?

A. Writing code that modifies its own structure

B. Writing code that writes code

C. Writing code that generates other code

D. Writing code that optimizes performance

Which Ruby module provides reflection capabilities for classes, modules, and objects?

A. Kernel

B. MetaModule

C. ObjectSpace

D. Reflection

What is the purpose of the method_missing method in Ruby?

A. Intercepting method calls before they are executed

B. Defining custom method behaviors based on method names

C. Handling undefined method calls

D. Providing default implementations for missing methods

What is a singleton class in Ruby?

A. A class that can have only one method

B. A class that is used to define methods for a single object

C. A class that can have only one subclass

D. None of the above