Which of the following is the correct syntax to define a predicate method named empty? in Ruby?

easy📝 Syntax Q3 of 15

Ruby - Methods

Which of the following is the correct syntax to define a predicate method named empty? in Ruby?

Adef empty?; true; end

Bdef empty; true; end

Cdef empty? (true) end

Ddef empty?? true end

Step-by-Step Solution

Solution:

Step 1: Check method definition syntax
Ruby methods are defined with def, method name, optional parentheses, body, and end.
Step 2: Validate predicate method syntax
Method name must end with '?', and the body can be a single expression followed by end.
Final Answer:
def empty?; true; end -> Option A
Quick Check:
Correct predicate method syntax = def name?; body; end [OK]

Quick Trick: Use def name?; body; end to define predicate methods [OK]

Common Mistakes:

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