Week 9 Quiz

Predict, then check: what does the last line of this program print?

daily = [12, 40, 25, 0, 33, 17, 27]
print(daily[0])
print(daily[1:3])

Select one.

• [40, 25, 0]
• [40, 25]
• [12, 40]
• [12, 40, 25]

Predict, then check: what does this program print?

a = [1, 2, 3]
b = a
b.append(4)
print(a)

Select one.

• [1, 2, 3]
• [4]
• [1, 2, 3, 4]
• [1, 2, 3, 4, 4]

Predict, then check: what does this program print?

nums = [3, 1, 2]
nums = nums.sort()
print(nums)

Select one.

• None
• [1, 2, 3]
• [3, 1, 2]
• [3, 2, 1]

A practice log removes every 0 while the loop walks the same list. Predict, then check: what does it print?

minutes = [0, 0, 90, 0, 85]
for m in minutes:
    if m == 0:
        minutes.remove(0)
print(minutes)

Select one.

• [90, 85]
• [0, 90, 85]
• [90, 0, 0, 85]
• [90, 0, 85]

Predict, then check: what does the last line of this program print?

tasks = ["email", "lunch"]
tasks.append("gym")
tasks.insert(0, "coffee")
done = tasks.pop(0)
print(done, tasks)

Select one.

• coffee ['coffee', 'email', 'lunch', 'gym']
• coffee ['email', 'lunch', 'gym']
• None ['email', 'lunch', 'gym']
• email ['coffee', 'lunch', 'gym']

Predict, then check: what does the last line of this program print?

a = [1, 2]
a.append([3, 4])
print(a)
b = [1, 2]
b.extend([3, 4])
print(b)
print(len(a), len(b))

Select one.

• 4 4
• 3 3
• 3 4
• 4 3

True or false: this program prints True on both lines, because a and b hold equal items.

a = [1, 2]
b = [1, 2]
print(a == b)
print(a is b)

True or false.

• True
• False

Which of these hand back None after they change a list in place? Select every one that does.

Select every option that applies.

• .append(x)
• .pop()
• .sort()
• sorted(nums)
• .remove(x)

The reading log walks its week of daily pages. Predict, then check: what does the first print line show?

daily = [12, 40, 25, 0, 33, 17, 27]
total = 0
for pages in daily:
    total = total + pages
print(total)
print(total / len(daily))

Select one.

• 127
• 22
• 7
• 154

In the same reading-log program, what does the second print line show?

daily = [12, 40, 25, 0, 33, 17, 27]
total = 0
for pages in daily:
    total = total + pages
print(total)
print(total / len(daily))

Select one.

• 22
• 22.0
• 154
• 7