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

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

<p>False (A)</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 (C)</p> Signup and view all the answers

Which statement about dictionaries in Python is true?

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

What is a characteristic of dictionaries in Python?

<p>Dictionaries are indexed by keys (B)</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 (C)</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 (B)</p> Signup and view all the answers

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

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

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