Why do Ruby predicate methods conventionally end with a question mark?

hard📝 Conceptual Q10 of 15

Ruby - Methods

ATo improve performance

BTo make the method private

CTo allow method overloading

DTo indicate the method returns a boolean value

Step-by-Step Solution

Solution:

Step 1: Understand Ruby naming conventions
Methods ending with '?' signal they answer yes/no questions by returning true or false.
Step 2: Eliminate incorrect options
Ending with '?' does not affect privacy, overloading, or performance.
Final Answer:
To indicate the method returns a boolean value -> Option D
Quick Check:
Question mark means boolean return [OK]

Quick Trick: Question mark signals boolean return in method names [OK]

Common Mistakes:

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