Python Sets and Dictionaries Worksheet

Which of the following is a characteristic of sets in Python?

• Ordered collection

• Allows duplicates

• Mutable and supports mathematical set operations

• Supports indexing and slicing

Why do sets in Python not support indexing?

• They are mutable

• They maintain order

• They are unordered and use hash-based storage

• They allow duplicates

How can you create a set from the string 'spam'?

• set = 'spam'

• set('spam')

• {'spam'}

• list('spam')

What happens when you try to add a duplicate element to a set?

• It raises an error

• The set remains unchanged

• The duplicate replaces the existing one

• The set becomes a list

Which elements can be added to a set?

• Lists

• Dictionaries

• Tuples

• Sets

What does the union operation on sets do?

• Finds common elements

• Combines all unique elements

• Finds elements in one but not the other

• Checks if one is subset of another

What is the difference between remove() and discard() in sets?

• remove() does not raise error if element not present, discard() does

• discard() does not raise error if element not present, remove() does

• Both raise errors

• No difference

What does pop() method do in a set?

• Removes the first element

• Removes and returns an arbitrary element

• Removes the last element

• Clears the set

How do you check if two sets have no elements in common?

• issubset()

• issuperset()

• isdisjoint()

• intersection()

What is the output of {x ** 2 for x in [1, 2, 3, 4]}?

• {1, 4, 9, 16}

• [1, 4, 9, 16]

• (1, 4, 9, 16)

• Error