You want to write a predicate method palindrome? that returns true if a string reads the same forwards and backwards. Which code correctly implements this?

hard📝 Application Q8 of 15

Ruby - Methods

You want to write a predicate method palindrome? that returns true if a string reads the same forwards and backwards. Which code correctly implements this?

Adef palindrome?(str) str == str.reverse end

Bdef palindrome?(str) str.reverse end

Cdef palindrome?(str) str.length > 0 end

Ddef palindrome?(str) str == str.upcase end

Step-by-Step Solution

Solution:

Step 1: Understand palindrome logic
A palindrome reads the same forwards and backwards, so the string must equal its reverse.
Step 2: Check each option
def palindrome?(str) str == str.reverse end compares str with str.reverse, returning true if they match.
Final Answer:
def palindrome?(str)\n str == str.reverse\nend -> Option A
Quick Check:
Palindrome check = string equals reverse [OK]

Quick Trick: Compare string to its reverse for palindrome check [OK]

Common Mistakes:

MISTAKES

Returning reversed string instead of boolean
Checking length only
Comparing to uppercase version

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You want to write a predicate method palindrome? that returns true if a string reads the same forwards and backwards. Which code correctly implements this?

Step 1: Understand palindrome logic

Step 2: Check each option

Final Answer:

Quick Check:

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