CS306 Quiz 4

Q1. Which of the following is true about iterating through a set?

1. Sets are unordered, so iteration may not follow insertion order
2. You cannot iterate over a set
3. Sets support list slicing for iteration
4. Sets are indexed, and you can use the index to iterate

Correct answer: Sets are unordered, so iteration may not follow insertion order

Q2. How can multiple elements be added to a set at once?

1. extend()
2. add()
3. update()
4. append()

Correct answer: update()

Q3. What happens when a duplicate element is added to a set?

1. The duplicate is ignored
2. The set throws an error
3. The duplicate is added at the end
4. The set grows in size

Correct answer: The duplicate is ignored

Q4. Which of the following is true about variable-length unpacking in Python?

1. The * operator can be used with strings and tuples, but not lists
2. You cannot use * for unpacking a tuple
3. You can only use * with lists
4. The * operator captures all remaining elements during unpacking

Correct answer: The * operator captures all remaining elements during unpacking

Q5. How can you repeat the elements of a tuple (1, 2) three times?

1. tuple(1, 2).repeat(3)
2. (1, 2).repeat(3)
3. (1, 2) * 3
4. (1, 2) + 3

Correct answer: (1, 2) * 3

Q6. How would you unpack a list l = [1, 2, 3] into individual variables?

1. a = l[0], b = l[1]
2. a, *b = l
3. a, b = l
4. a, b, c = l

Correct answer: a, b = l

Q7. What does Python's consistency refer to in handling data structures?

1. Lists and strings are treated as mutable
2. Similar operations are available for different data structures
3. Python only supports immutable data structures
4. Lists and strings are immutable

Correct answer: Similar operations are available for different data structures

Q8. In which scenario "set" is most useful?

1. When you need to access elements by index
2. When you need to preserve the order of elements
3. When you need to modify elements in place
4. When you need to store unique elements

Correct answer: When you need to store unique elements

Q9. Which of the following is a property of sets in Python?

1. Sets can contain only numbers
2. Sets allow duplicate elements
3. Sets are ordered
4. Sets do not allow duplicate elements

Correct answer: Sets do not allow duplicate elements

Q10. How can you find the index of element 30 in a tuple t = (10, 20, 30, 40)?

1. t.search(30)
2. index(t, 30)
3. find(30, t)
4. t.index(30)

Correct answer: t.index(30)