Understanding List Indexing and Slicing in Python

What is the base index number for lists in Python?

• None of the above

• 1

• 0

• -1

How do you access the last element of a list named 'a'?

• a[0]

• a[last]

• a[-1]

• a[len(a)-1]

What error is raised if you use an index that is out of range?

• ValueError

• TypeError

• IndexError

• SyntaxError

How can you slice a list 'a' from index 2 to 4 (inclusive of 2 but not 4)?

• a[2,4]

• a[2]-a[4]

• a[2:4]

• a[2:5]

What does negative indexing allow you to do?

• Access elements from the end of the list

• None of the above

• Delete elements from the list

• Multiply list elements

What does the slice 'a[::2]' do?

• Reverses the list

• Duplicates the list

• Selects every second element from the list

• Clears the list

What will 'a[:-1]' return?

• An empty list

• A copy of the list without the last element

• The last element of the list

• A reversed copy of the list

If a list 'a' has 6 elements, what index gives you the last element using positive indexing?

• None of the above

• -1

• 6

• 5

What does omitting both indexes in a slice operation return?

• An empty list

• A syntax error

• A copy of the entire list

• The first element of the list

How do you reverse a list 'a' using slicing?

• a[::-1]

• a[1::-1]

• a[-1:0]

• a.reverse()