List 2

What does negative indexing in Python lists start with?

• -1 referring to the last item

• 0 referring to the first item

• 1 referring to the second item

• -2 referring to the second last item

Answer explanation

Negative indexing in Python lists starts with -1, referring to the last item in the list.

Which method is used to determine if an item is present in a list?

• in keyword

• exists() method

• check() method

• find() method

Answer explanation

The 'in' keyword is used to determine if an item is present in a list, making it the correct choice among the options provided.

What is the result of print(thislist[2:5]) if thislist = ["apple", "banana", "cherry", "orange", "kiwi", "melon", "mango"]?

• ['banana', 'cherry', 'orange', 'kiwi']

• ['cherry', 'orange', 'kiwi', 'melon']

• ['banana', 'cherry', 'orange']

• ['cherry', 'orange', 'kiwi']

Answer explanation

The result of print(thislist[2:5]) will be ['cherry', 'orange', 'kiwi'] because it selects elements starting from index 2 up to, but not including, index 5 from the list thislist.

How can you access the last item of a list?

• Using the index 0

• Using the index -1

• Using the index 1

• Using the method last()

Answer explanation

To access the last item of a list, you can use the index -1. This is because -1 represents the last element in a list in Python.

How can you slice a list in Python to obtain a subset of its elements?

• By specifying the start and end index of the slice

• Using a specific list method designed for slicing

• By specifying the maximum value to include

• Using the list's length property

Answer explanation

To obtain a subset of elements from a list in Python, you can slice it by specifying the start and end index of the slice.

What is the index of the first item in a Python list?

• It does not have an index

• 1

• -1

• 0

Answer explanation

The index of the first item in a Python list is 0, making the correct answer choice '0'. Lists in Python are zero-indexed, meaning the first element is at index 0.

If you want to return the items from the beginning to, but NOT including, 'kiwi', which slicing would you use?

• [:4]

• [:-3]

• [:3]

• [0:-3]

Answer explanation

To return items from the beginning to, but not including, 'kiwi', you would use the slicing [:4] as it includes items up to index 3 but not including index 4 where 'kiwi' is located.

How do you print the second item in the list thislist = ["apple", "banana", "cherry"]?

• print(thislist[0])

• print(thislist[2])

• print(thislist[-2])

• print(thislist[1])

Answer explanation

The correct choice is to print(thislist[1]) to access the second item in the list.

To check if 'apple' is in the list thislist = ["apple", "banana", "cherry"], which syntax is correct?

• thislist.find('apple')

• thislist.contains('apple')

• "apple" in thislist

• 'apple'.exists(thislist)

Answer explanation

The correct syntax to check if 'apple' is in the list is "apple" in thislist.

What does print(thislist[-4:-1]) return if thislist = ["apple", "banana", "cherry", "orange", "kiwi", "melon", "mango"]?

• ['orange', 'kiwi', 'melon']

• ['banana', 'cherry', 'orange']

• ['cherry', 'orange', 'kiwi']

• ['apple', 'banana', 'cherry']

Answer explanation

The correct answer is ['orange', 'kiwi', 'melon'] because thislist[-4:-1] returns elements starting from the 4th last element up to the 1st last element.