programming beginner 10 sample questions

Ruby MCQ Practice Test

A dynamic, object-oriented language famous for its elegant syntax and use in web development

Q1. What is the purpose of the 'bind' method in Ruby's Net:IMIP4 library?

Explanation: The 'bind' method in Ruby's Net:IMIP4 library is used to associate a local socket with a specific network interface and port number. This is necessary for the socket to receive incoming connections.

Q2. What is the purpose of the 'self' keyword in Ruby?

Explanation: In Ruby, the self keyword is used to refer to the current object. It is used to access the current object's attributes and methods.

Q3. What is the purpose of the "puts" method in Ruby?

Explanation: The "puts" method in Ruby is used to print output to the console. It is commonly used for debugging purposes and can also be used to print output to the user.

Q4. What is the purpose of the "freeze" method in Ruby's Module class?

Explanation: The "freeze" method in Ruby's Module class is used to prevent the module from being modified after it's loaded. This is useful for ensuring that the module's contents remain unchanged throughout the execution of the program.

Q5. What is the purpose of the `self` keyword in Ruby when calling a method?

Explanation: The `self` keyword in Ruby is used to refer to the current object when calling a method. This is useful when the method is defined in the class and you want to call it on the instance.

Q6. What is the purpose of the 'require_relative' method in Ruby?

Explanation: The 'require_relative' method in Ruby is used to load a Ruby file that is located in the same directory as the current file. This is different from the 'require' method, which is used to load a file from a different directory or a gem.

Q7. What is the purpose of the "self" keyword in Ruby?

Explanation: In Ruby, the "self" keyword refers to the current object, allowing you to access its attributes and methods. This is useful when defining methods within a class.

Q8. Which Ruby method is most directly used to implement the "monkey patching" technique, allowing a module to modify or extend the behavior of an existing class?

Explanation: The `extend` method is the primary way to apply monkey patching in Ruby. It adds the methods of a module as class methods to the target class, effectively modifying the class's behavior at runtime. While `class_eval` can be used to achieve similar results, `extend` is the more direct and common approach for monkey patching.

Q9. In Ruby, what does object.extend(ModuleName) do?

Explanation: extend mixes a module into a single object's singleton class, giving that one object the module's methods.

Q10. What is the purpose of the 'require' method in Ruby's require_dependency method?

Explanation: The 'require' method in Ruby is used to load a Ruby file. When used with require_dependency, it loads the file and raises an error if it is not a valid Ruby file.

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Ruby MCQ Practice Test | Mind Hustle