Python Dictionaries Syntax and Examples
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Questions and Answers

How can you give a default value to all keys in a dictionary?

  • Using the `setdefault()` method
  • By calling the `initialize()` function
  • With the `default()` function
  • Using the `fromkeys()` method (correct)

    • What is the default value assigned to keys when using the fromkeys() method without specifying a value?

  • ' '
  • 'None'
  • None (correct)
  • '0'

    • How can you replace the value associated with a key in a dictionary?

  • Using the `swap()` method
  • By iterating over all items
  • With the `replace()` method
  • Using brackets [ ] and the equals sign = (correct)

    • Which method in Python allows you to search for the presence of objects in a dictionary by their keys?

    <p><code>keys()</code></p> Signup and view all the answers

    What will be the result of the expression 'Last_name' in Keys?

    <p>False</p> Signup and view all the answers

    How can you search for the presence of specific values in a dictionary?

    <p><code>values()</code> method</p> Signup and view all the answers

    Which statement about dictionaries in Python is true?

    <p>Each key in a dictionary must be unique</p> Signup and view all the answers

    What does the function dict() do in Python when creating dictionaries?

    <p>Converts a list to a dictionary</p> Signup and view all the answers

    What is a characteristic of dictionaries in Python?

    <p>Dictionaries are indexed by keys</p> Signup and view all the answers

    How can you modify a value associated with a key in a dictionary?

    <p>By directly assigning a new value to the key</p> Signup and view all the answers

    In Python, how can default values be set for keys in a dictionary?

    <p>Using the setdefault() method</p> Signup and view all the answers

    Which operation can change the size of a dictionary in Python?

    <p>Inserting elements</p> Signup and view all the answers

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