Ruby - Class Methods and Variables
Which of the following is the correct way to define a class instance variable in Ruby?
Which of the following is the correct way to define a class instance variable in Ruby?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify class instance variable syntax
Class instance variables start with a single @ and are defined inside the class but outside methods.Step 2: Check each option
@count = 0 uses@count = 0correctly inside the class body. @@count = 0 uses class variables (@@), which are different. def @count; @count; end is invalid method syntax. self.@count = 0 is invalid syntax.Final Answer:
@count = 0 -> Option BQuick Check:
Class instance variable = single @ [OK]
Quick Trick: Class instance variables use single @ inside class body [OK]
Common Mistakes:
- Using @@ instead of @ for class instance variables
- Trying to use self.@ which is invalid
- Defining variables inside methods without self
Master "Class Methods and Variables" in Ruby
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Ruby Quizzes