PCEP-30-02 3.1 Collect and Process Data Using Lists PCEP-30 Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   Which expression creates a 2x3 matrix (2 rows, 3 columns) filled with zeros?

   • A[[0] * 3] * 2
   • B[[0, 0], [0, 0], [0, 0]]
   • C[[0 for _ in range(3)] for _ in range(2)]
   • D[0] * 6
   Reveal Solution Discussion Select an answer first
2. 32foundation · easy

   What is the result of the following code? ```python a = [1, 2, 3] b = a[:] b.append(4) print(a) ```

   • A[1, 2, 3, 4]
   • B[1, 2, 3]
   • C[1, 2, 3, 4] and [1, 2, 3, 4]
   • DError
   Reveal Solution Discussion Select an answer first
4. 33foundation · easy

   What is the result of `[1, 2, 3, 4, 5][1:4]`?

   • A[1, 2, 3, 4]
   • B[2, 3, 4]
   • C[2, 3, 4, 5]
   • D[1, 2, 3]
   Reveal Solution Discussion Select an answer first
5. 34application · medium

   A list `data = [3, 1, 4, 1, 5, 9, 2, 6]` needs to be modified so that it becomes `[1, 1, 2, 3, 4, 5, 6, 9]` in place (the original variable must reference the sorted list). Which single statement accomplishes this?

   • A`data.sort()`
   • B`data = data.sort()`
   • C`data.reverse()`
   • D`data = sorted(data)`
   Reveal Solution Discussion Select an answer first
6. 35foundation · easy

   What is the result of `[x * 2 for x in [1, 2, 3]]`?

   • A[2, 4, 6]
   • B[1, 4, 9]
   • C[2, 3, 4]
   • D[1, 2, 3]
   Reveal Solution Discussion Select an answer first