Which of the following is the output of the below Python code? ``python str = 'Hello World' print(str[::-1]) ``

Question

str = 'Hello World'
print(str[::-1])

Options

• AHello World
• BdlroW olleH
• CWorld
• DHello

• A
  15% (5)
• B
  76% (26)
• C
  6% (2)
• D
  3% (1)

Explanation

str[::-1] uses Python's slice notation with a step of -1, which iterates through the string in reverse order - producing dlroW olleH, making B correct.

Why the distractors are wrong:

• A (Hello World) would result from printing str with no slicing at all.
• C (World) would require slicing like str[6:] to extract just the second word.
• D (Hello) would require slicing like str[:5] to extract just the first word.

Memory tip: Think of [::-1] as "flip it" - the -1 step means "go backwards one character at a time from end to start." Any time you see a negative step in a slice, the string is being reversed.

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