[Solved] Identify the problem in this Ruby code snippet:text = " Hello World" puts text.strip.upcase! — Ans: upcase! modifies string in place and returns nil if no change | Ruby

Ruby - String Operations

Identify the problem in this Ruby code snippet:

text = "  Hello World"
puts text.strip.upcase!

Astrip! method should be used instead of strip

Bstrip method removes only spaces inside the string

Cupcase! is not a valid Ruby method

Dupcase! modifies string in place and returns nil if no change

Step-by-Step Solution

Solution:

Step 1: Understand upcase! behavior
upcase! changes the string in place and returns nil if no changes were made.
Step 2: Check method chaining with strip
strip returns a new string, so chaining upcase! on it may return nil if the string is already uppercase.
Final Answer:
upcase! modifies string in place and returns nil if no change -> Option D
Quick Check:
upcase! returns nil if no change [OK]

Quick Trick: Bang methods (!) modify in place and may return nil [OK]

Common Mistakes:

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