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Lesson 14 Quiz: Debugging: Reading Error Messages and Fixing Bugs

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Questions and answer choices are the live Lesson 14 quiz. The answer key follows the Lesson 14 text.

1. Where should you look first in an error message?

A. The very first line B. The last line, which names the error and what went wrong C. The middle of the message D. Nowhere, since you should just try again

2. You see NameError: name ‘scroe’ is not defined. What is the most likely cause?

A. A typo in a variable name B. A list position that doesn't exist C. A missing colon D. Dividing by zero

3. A list has three items and you ask for fruits[3]. Which error do you get?

A. KeyError B. NameError C. IndexError D. ValueError

4. A program runs without any error but prints the wrong average. What is the best first step?

A. Delete the program and start again B. Add print() lines to see what the values are at each step C. Change several lines at once to see if it helps D. Ignore it, because no error means it is correct

5. What does TypeError: can only concatenate str (not “int”) to str mean?

A. A list position doesn't exist B. You tried to join text and a number with + C. A colon is missing D. The text doesn't look like a number

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