What is the expected output of the following code? ``python data = {'Peter': 30, 'Paul': 31} print(list(data.keys())) ``

Question

data = {'Peter': 30, 'Paul': 31}
print(list(data.keys()))

Options

• A['Peter': 30, 'Paul': 31]
• B['Peter', 'Paul']
• C['Peter': 30, 'Paul': 31]
• D['Peter', 'Paul']

• A
  7% (2)
• B
  3% (1)
• C
  17% (5)
• D
  72% (21)

Explanation

Option D is correct because dict.keys() returns a view of only the keys in the dictionary - not the values - and wrapping it with list() converts that view into a plain Python list of strings: ['Peter', 'Paul'].

Options A and C are wrong because they show ['Peter': 30, 'Paul': 31], which mixes dictionary syntax (colon-separated key-value pairs) inside a list - this is not valid Python. A list holds individual elements separated by commas, not key-value pairs. If you want keys and values, you'd call data.items(), which yields tuples like [('Peter', 30), ('Paul', 31)].

Options B and D appear identical as written, so the distinction is likely a formatting artifact in the original exam (e.g., different quote styles or whitespace). The key concept remains: list(data.keys()) produces ['Peter', 'Paul'].

Memory tip: Think of .keys(), .values(), and .items() as three "windows" into a dictionary - keys only, values only, or both as pairs. Wrapping any of them in list() just snapshots that window into a concrete list.

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