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1. What does this program print? ``

python
a = [3, 1, 4, 1, 5, 9, 2, 6]
total = 0
for i in range(2, 5):
    total += a[i]
print(total, 5 - 2)

``

15 410 310 49 3

2. What does this program print? ``

python
word = "forgestack"
print(word[4:7])
print(len(word[7:]))

``

gest, then 4est, then 4est, then 2est, then 3

3. A programmer wants the total of the temperatures in the half-open range [1, 3), which means positions 1 and 2. The code below adds the wrong items. What is the bug? ``

python
temps = [18, 21, 19, 25, 23]
total = 0
for i in range(1, 4):
    total += temps[i]
print(total)

``

The end should be 3, not 4: range(1, 4) also adds position 3, which the range [1, 3) leaves outThe start should be 0, not 1The total variable must start at 1The loop should count down with range(3, 1, -1)

4. A page loop should make only three pages for 9 results: [0, 3), [3, 6) and [6, 9). This code also prints an empty page [9, 9) with length 0. ``

python
total_items = 9
page_size = 3
for start in range(0, total_items + 1, page_size):
    end = min(start + page_size, total_items)
    print(f"page [{start}, {end}) length {end - start}")

`` Which change fixes it?

Change page_size to 1Change min to maxChange total_items + 1 to total_itemsSet page_size to 9

5. Two bookings are half-open ranges, so 9 to 10 and 10 to 11 should not clash. This function says they do clash. Which part is the bug? ``

python
def overlaps(a_start, a_end, b_start, b_end):
    return a_start <= b_end and b_start <= a_end

``

The function name is wrongThe and should be orBoth <= signs should be >=The <= signs let the end of one booking count as a clash with the start of the next, so 9-10 and 10-11 wrongly overlap

Off-by-one check