What does each of the following expressions evaluate to? Suppose that T is the tuple containing :
("These", ["are" , "a", "few", "words"] , "that", "we", "will" , "use")

1. T[1][0: :2]
2. "a" in T[1][0]
3. T[:1] + [1]
4. T[2::2]
5. T[2][2] in T[1]

The given expressions evaluate to the following:

1. ['are', 'few']
2. True
3. TypeError: can only concatenate tuple (not "list") to tuple
4. ('that', 'will')
5. True

Explanation

1. T[1] represents first element of tuple i.e., the list ["are" , "a", "few", "words"]. [0 : : 2] creates a list slice starting from element at index zero of the list to the last element including every 2^nd element (i.e., skipping one element in between).
2. "in" operator is used to check elements presence in a sequence. T[1] represents the list ["are" , "a", "few", "words"]. T[1][0] represents the string "are". Since "a" is present in "are", it returns true.
3. T[:1] is a tuple where as [1] is a list. They both can not be concatenated with each other.
4. T[2::2] creates a tuple slice starting from element at index two of the tuple to the last element including every 2^nd element (i.e., skipping one element in between).
5. T[2] represents the string "that". T[2][2] represents third letter of "that" i.e., "a". T[1] represents the list ["are" , "a", "few", "words"]. Since "a" is present in the list, the in operator returns True.