Week 3 Quiz

The user types 25, and the program stores the typed value as a string. What does the last line print?

typed = "25"
print(typed * 2)

Select one.

• 50
• 25
• 2525
• TypeError

The program converts the typed value before adding. What does the last line print?

typed = "25"
age = int(typed)
print(age + 1)

Select one.

• 26
• 251
• 2525
• TypeError

The reading log prints its status line. What does the last line print?

pages_read = 45
print(f"{pages_read} pages read so far")

Select one.

• {pages_read} pages read so far
• 45 pages read so far
• pages_read pages read so far
• TypeError

Count from 0, and remember a slice drops its stop. What does the last line print?

book = "the river book"
print(book[4:9])

Select one.

• river
• iver
• rive
• river

What does the last line print?

book = "the river book"
print(book[-1])

Select one.

• t
• k
• o
• IndexError

Predict, then check: what does this one-line program print?

print("PYTHON"[1:4])

Select one.

• YTH
• PYT
• YTHO
• PYTH

The title has 14 characters. When this program runs, what happens?

book = "the river book"
print(book[14])

Select one.

• It prints k
• It prints an empty line
• It prints the river book
• IndexError, with nothing printed

Which of these lines print without raising an error? Select every line that does.

book = "the river book"
pages_read = 45

Select every option that applies.

• print(book[13])
• print(book[4:99])
• print(book[14])
• print(pages_read + " pages read so far")
• print(book[len(book)])

A chatbot tells you that print("PYTHON"[1:4]) displays YTHO, because the slice runs from index 1 to index 4. What is the best next step?

Select one.

• Accept YTHO, since the chatbot named both indexes
• Ask the chatbot again until it gives one reply twice
• Switch to a chatbot that sounds more confident
• Run the line in a Python runner and compare its output with the claim

This program prints Now reading: the river book and then stops at line 3. Because a line printed before the error, the program was running when it stopped, so this is a runtime error, and the last line of its error message names TypeError.

book = "the river book"
print(f"Now reading: {book}")
print(45 + " pages read so far")

True or false.

• True
• False