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Type Conversion and Built-in Functions Flashcards

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  1. What does bool("") return in Python?

    Answer: False

    An empty string is falsy in Python, so bool("") returns False.

  2. What does bool("False") return in Python?

    Answer: True

    Any non-empty string is truthy in Python, so bool("False") returns True regardless of the string's content.

  3. What is the result of int(True) in Python?

    Answer: 1 (integer)

    In Python, True is a subclass of int with the value 1, so int(True) returns 1.

  4. What does float(False) return in Python?

    Answer: 0.0 (float)

    False has an integer value of 0, and float() converts that to 0.0.

  5. What does list(range(4)) produce in Python?

    Answer: [0, 1, 2, 3]

    list() converts the range object to a list; range(4) generates 0 through 3, giving [0, 1, 2, 3].

  6. What is the output of sorted([3, 1, 4, 1, 5, 9])?

    Answer: [1, 1, 3, 4, 5, 9]

    sorted() returns a new list with all elements sorted in ascending order, preserving duplicates.

  7. What does len([1, [2, 3], 4]) return in Python?

    Answer: 3

    len() counts only the top-level elements; the list has 3 items: 1, [2, 3], and 4.