Super keyword behavior in Ruby - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the super keyword do in Ruby?

The super keyword calls the same method from the parent class, allowing you to extend or reuse the parent's behavior.

intermediate

What happens if you use super without parentheses and arguments inside a method?

Ruby automatically passes all the arguments received by the current method to the parent method when you call super without parentheses.

intermediate

How does super() differ from super in Ruby?

super() calls the parent method without passing any arguments, even if the current method received some.

beginner

Can super be used in methods without a parent method of the same name?

No. Using super in a method without a matching parent method will raise a NoMethodError.

beginner

Why is super useful in object-oriented programming?

super helps reuse and extend code from parent classes, making programs easier to maintain and avoiding duplication.

What does super do when called inside a method?

A Calls the same method from the parent class

B Calls a random method from the parent class

C Calls the method from the child class

D Creates a new method

super calls the same method from the parent class to reuse or extend its behavior.

What happens if you write super() with empty parentheses?

A Calls a different method

B Passes all current method arguments to the parent method

C Raises an error

D Passes no arguments to the parent method

super() calls the parent method without passing any arguments.

If a method receives arguments and you call super without parentheses, what happens?

A No arguments are passed to the parent method

B Only the first argument is passed

C All arguments are passed to the parent method

D An error occurs

Calling super without parentheses passes all current method arguments to the parent method.

What error occurs if super is called but no parent method exists?

A NameError

B NoMethodError

C ArgumentError

D SyntaxError

Ruby raises a NoMethodError if super is called but no matching parent method exists.

Why use super in a child class method?

A To reuse and extend the parent method's behavior

B To call a method from a sibling class

C To delete the parent method

D To ignore the parent method

super allows the child method to reuse and add to the parent method's behavior.

Explain how the super keyword works in Ruby and how it handles arguments.

Think about how Ruby decides what arguments to send when you use super.

Describe a real-life example where using super helps avoid repeating code.

Imagine a recipe where you want to add toppings but keep the base steps.