Grade 10 Computer Science — Changing and growing a list

1.Two lists are joined into a third one here. What does this program print?

first = [1, 2]
second = [7, 8, 9]
both = first + second
print(len(both))

2.A list called nums holds [2, 4, 6]. Each of these lines is run on its own, starting from that same list every time. Match each line to what nums holds afterwards.

3.Two values are added on the end, one after the other. What does this program print?

bag = [3]
bag.append(7)
bag.append(2)
print(bag[1] + bag[2])

4.A list called pins holds [8, 3]. Each of these lines is run on its own, starting from that list every time. Put them in order of how many values pins holds afterwards, fewest first.

• pins = pins + [1, 2]
• pins[0] = 4
• pins = pins + [6, 7, 0]
• pins.append(9)

5.A value is written over, and then the list is measured. What does this program print?

sizes = [5, 2, 9]
sizes[0] = 40
print(len(sizes))

6.Something is added on the end and something else is written over. What does this program print?

row = [2, 4, 6]
row.append(8)
row[0] = 10
print(row[0] + row[3])

7.A value is written over here rather than added on. What does this program print?

scores = [3, 8, 1, 6]
scores[1] = 10
print(scores[1] + scores[3])

8.Two lists are joined, and then a position is asked for out of the joined one. What does this program print?

a = [10, 20]
b = [30, 40, 50]
c = a + b
print(c[3])