Python questions

1) Suppose you have the following series of queue operations:

q = Queue()

q.enqueue('hello')

q.enqueue('dog')

q.enqueue(3)

q.dequeue()

What items are left on the queue?

a) 'dog', 3

b) 'hello', 'dog'

c) 'hello', 3

d) 'hello', 'dog', 3

2) Which of the following are examples of queues? Mark all that apply.

a) Customers waiting in a checkout line.

b) A deck of playing cards.

c) A file directory system.

d) A line of cars at a tollbooth.

3)

4)

5)

6)

7)

8)

Which of the following are binary trees? Mark all that apply. 2 6 8 9 10 12 2 4 6 7