Dynamic typing vs strong typing in Ruby - Quick Revision & Key Differences

Recall & Review

beginner

What is dynamic typing?

Dynamic typing means the type of a variable is checked at run-time, not before. You can change what kind of value a variable holds while the program runs.

beginner

What does strong typing mean?

Strong typing means the language prevents mixing different types in ways that don't make sense, catching errors when you try to do that.

intermediate

Is Ruby dynamically typed, strongly typed, or both?

Ruby is both dynamically typed and strongly typed. You don't declare variable types, but Ruby won't let you mix incompatible types without errors.

beginner

Example: What happens if you add a number and a string in Ruby?

Ruby raises an error because it is strongly typed and does not allow adding a number and a string directly.

beginner

Why is dynamic typing helpful for beginners?

Dynamic typing lets you write code faster without worrying about types upfront. It feels like talking to a friend who understands what you mean.

What does dynamic typing allow you to do?

A Prevent mixing types

B Declare variable types before running

C Compile code faster

D Change variable types while the program runs

Dynamic typing means variable types are checked at run-time, so you can change what a variable holds while running.

What is a key feature of strong typing?

A Prevents invalid operations between types

B Allows any operation between types

C Requires variable declarations

D Runs faster

Strong typing stops you from mixing incompatible types in ways that cause errors.

Which statement is true about Ruby's typing?

A Ruby is dynamically and strongly typed

B Ruby is weakly typed

C Ruby is statically typed

D Ruby requires type declarations

Ruby checks types at run-time (dynamic) and prevents invalid type mixing (strong).

What happens if you try to add a number and a string in Ruby?

A It converts both to strings and adds

B It raises an error

C It ignores the string

D It adds the number to the string length

Ruby raises an error because it does not allow adding a number and a string directly.

Why might dynamic typing be easier for beginners?

A Because it forces strict rules

B Because it requires declaring types

C Because it lets you focus on logic without types first

D Because it runs faster

Dynamic typing lets beginners write code without worrying about types upfront.

Explain the difference between dynamic typing and strong typing in your own words.

Think about when types are checked and how strict the language is about mixing types.

Describe how Ruby's typing system affects writing and running code.

Consider both the freedom and the rules Ruby gives you.