What is the expected output of the following code? ``python x, y, z = 3, 2, 1 z, y, x = x, y, z print(x, y, z) ``

Question

x, y, z = 3, 2, 1
z, y, x = x, y, z
print(x, y, z)

Options

• A1 2 3
• B122
• C321
• D213

• A
  81% (17)
• B
  10% (2)
• C
  5% (1)
• D
  5% (1)

Explanation

Option A is correct because Python evaluates the entire right-hand side before any assignment occurs. When z, y, x = x, y, z runs, Python first captures the current values (x=3, y=2, z=1) as a tuple, then unpacks them left-to-right: z=3, y=2, x=1 - so print(x, y, z) outputs 1 2 3.

Option C (321) is the most tempting trap - it's the original values of x, y, z and would be correct only if the swap line were absent. Option D (213) has no basis; no sequence of correct assignments produces that order. Option B (122) is nonsensical - no value of 2 appears twice, making it easy to eliminate immediately.

Memory tip: Think of tuple unpacking like a temp variable swap - Python "takes a snapshot" of the right side all at once before touching any variable on the left, so simultaneous assignments never clobber each other mid-operation.

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