PCEP Practice Question: Functions, Tuples, Dictionaries and Exceptions

Answer analysis

Option-by-option breakdown

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

• ✓

  1. Create a list with brackets: my_list = [] 2. Assign it to a variable: my_list = [1, 2, 3] 3. Access elements by index: print(my_list[0]) 4. Modify elements by assignment: my_list[0] = 10 5. Grow the list with methods: my_list.append(4)

  Why this is correct

  This is correct because you first create an empty list or a list literal, assign it to a variable, then you can access elements, modify them, and finally grow the list using methods like append.

• ✗

  1. Access elements by index: my_list[0] 2. Create a list with brackets: [] 3. Assign it to a variable: my_list = [] 4. Modify elements by assignment: my_list[0] = 10 5. Grow the list with methods: my_list.append(4)

  Why it's wrong here

  This is incorrect because you cannot access elements before creating and assigning the list. The list must exist first.

• ✗

  1. Create a list with brackets: my_list = [] 2. Access elements by index: print(my_list[0]) 3. Assign it to a variable: my_list = [1, 2, 3] 4. Modify elements by assignment: my_list[0] = 10 5. Grow the list with methods: my_list.append(4)

  Why it's wrong here

  This is incorrect because you are accessing elements of an empty list (which would cause an IndexError) before assigning the actual list content. The assignment to a variable should be done right after creation.

• ✗

  1. Create a list with brackets: my_list = [] 2. Assign it to a variable: my_list = [1, 2, 3] 3. Grow the list with methods: my_list.append(4) 4. Access elements by index: print(my_list[0]) 5. Modify elements by assignment: my_list[0] = 10

  Why it's wrong here

  This is incorrect because you should access and modify elements before appending? Actually you can append anytime, but typically you access and modify existing elements before growing. Also, modifying after appending is fine, but the common logical order is access then modify then grow. However, the more critical error is that you might be trying to access index 0 after appending, which still works. But the expected order in typical usage is access first, modify, then grow. So this order is not the most logical.