Python Quiz: Module 2

Formatting and Files

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1. Which of the following code snippets will raise an error message assuming no variable assignments?
   • A. print("Hello " + "Friend")
   • B. print('Hello','Friend')
   • C. print("Hello", Friend)
   • D. print("Hello, 'Friend'")
2. The variables product and cost have been assigned values using this code: product:str = 'apple'
cost:float = 1.39
   Which of the following code snippets will raise and error message?
   • A. print(product, cost)
   • B. print(product + cost)
   • C. print(product + str(cost))
   • D. print(product, 'costs', cost)
3. What type of error generated in question 2 above?
   • A. IndentationError
   • B. ValueError
   • C. TypeError
   • D. SyntaxError
4. Based on the variables created in question 2, which of the four ways to format output is used to generate This apple costs $1.39.:
   print(f'This {product} costs ${cost:.2f}.')?
   • A. Formatting with a % operator
   • B. Formatting with .format()
   • C. Formatting with and f-string
   • D. Formatting with concatenation
5. Based on the variables created in question 2, which of the four ways to format output is used to generate This apple costs $1.39.:
   print("This {} costs ${:.2f}.".format(product,cost))?
   • A. Formatting with a % operator
   • B. Formatting with .format()
   • C. Formatting with and f-string
   • D. Formatting with concatenation
6. What is the purpose of the backslash in this code: print('I\'m enjoying Python.')?
   • A. English contractions require a backslash in Python
   • B. When you enclose a string with single quotes you must escape apostrophes because they will be interpreted as quotes
   • C. Python strings that include an apostrophe must place a backslash in front of it
   • D. Backslashes make code look cleaner
7. Which characters can be used to render single quotes, double quotes, newline and tab characters without using a backslash?
   • A. """
   • B. &&&
   • C. +++
   • D. '''
8. Using three string variables, name, address, phone, have been defined and there is a variable file_ref that points to an open file, which code snippets below will NOT be helpful in creating a CSV file?
   • A. file_ref.write("{},{},{}\n".format(name,address,phone))
   • B. file_ref.write(f"{name},{address},{phone}\n")
   • C. file_ref.write(name + address + phone + "\n")
   • D. file_ref.write(name,address,phone,sep=',',"\n")
9. Given code that sets the value of val, val: float = 1000/3*2, what is the number returned by this code: print(1000/3*2:.2f)?
   • A. 1666.67
   • B. 1666.6666666666665
   • C. 1666.00
   • D. 1700.00
10. What output is expected and why, when running the following code:
    msg: str
msg += "hello"
print(msg)
    • A. no output because msg is not assigned a value
    • B. NameError because msg was not defined when string concatenation was attempted
    • C. hello was printed because msg contained "hello" before print was called
    • D. SyntaxError because the += operator can only be used with numbers