PCEP Computer Programming and Python Fundamentals Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  [x for x in range(1,4)]

  Why this is correct

  range(1,4) yields 1, 2 and 3, stopping before the exclusive upper bound. The comprehension collects each value into a new list, producing [1, 2, 3] with the correct integers in ascending order, satisfying the question's requirement.

• ✗

  (1, 2, 3)

  Why it's wrong here

  Parentheses create a tuple, an immutable sequence, not a list; the question asks specifically for list creation. It is tempting because the values and order match, but tuples lack list methods such as append, and only square-bracket syntax or list() produces the required mutable list object.

• ✓

  list((1, 2, 3))

  Why this is correct

  list() accepts any iterable and builds a new list from its elements. Passing the tuple (1, 2, 3) therefore returns [1, 2, 3], converting the tuple's contents into a list rather than copying the tuple itself, which matches the required output.

• ✓

  [1, 2, 3]

  Why this is correct

  A list literal directly enumerates the elements between square brackets, so `[1, 2, 3]` builds the required list in a single expression. This satisfies the stem's constraint of producing a list containing exactly the numbers 1, 2 and 3, with no conversion or iteration needed.

• ✗

  {1, 2, 3}

  Why it's wrong here

  Curly braces create a set, which is unordered and rejects duplicates, so it is not a list containing 1, 2, 3. It is tempting because the literal displays the same three numbers, but sets cannot be indexed or appended to, and the question explicitly requires list objects.

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