Chapter 3: Conditionals & Exceptions (Review Questions)¶

The questions below assume that you have read Chapter 3 .

Be concise in your answers! Most questions can be answered in one sentence.

Essay Questions¶

Q1: What is the singleton design pattern? How many objects does the expression [True, False, True, False] generate in memory?

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Q2: What do we mean when we talk about truthy and falsy expressions?

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Q3: Describe in your own words the concept of short-circuiting! What does it imply for an individual sub-expression in a boolean expression?

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Q4: Explain how the conceptual difference between a statement and an expression relates to the difference between a conditional statement and a conditional expression.

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Q5: Why is the use of temporary variables encouraged in Python?

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Q6: What does the finally-clause enforce in this code snippet? How can a try statement be useful without an except-clause?

try:
    print("Make a request to a service on the internet")
finally:
    print("This could be clean-up code")

< your answer >

True / False Questions¶

Motivate your answer with one short sentence!

Q7: The objects True, False, and None represent the idea of yes, no, and maybe answers in a natural language.

Hint: you also respond with a code cell.

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Q8: The try statement is useful for handling syntax errors.

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