Python Data Types

What are the primitive data types in Python?

• double

• list

• char

• int, float, complex, bool, str

Answer explanation

The primitive data types in Python are int, float, complex, bool, and str. Double, list, and char are not primitive data types in Python.

Explain the difference between mutable and immutable types in Python.

• Mutable types can be modified after creation, while immutable types cannot be changed.

• Immutable types are faster than mutable types in Python.

• Mutable types are always built-in data types, while immutable types are user-defined.

• Mutable types cannot be modified after creation, while immutable types can be changed.

Answer explanation

Mutable types can be modified after creation, while immutable types cannot be changed.

How do you define a list in Python? Provide an example.

• my_list = {1, 2, 3}

• my_list = [1 2 3]

• my_list = [1, 2, 3]

• my_list = (1, 2, 3)

Answer explanation

To define a list in Python, you use square brackets []. The correct example is: my_list = [1, 2, 3]

What is the main difference between lists and tuples in Python?

• Lists are mutable, tuples are immutable.

• Lists and tuples have the same methods available.

• Lists and tuples cannot store different data types.

• Lists are immutable, tuples are mutable.

Answer explanation

Lists are mutable, tuples are immutable. This means that lists can be changed after creation, while tuples cannot be modified.

How do you create a dictionary in Python? Give an example.

• my_dict = {'key1': 'value1', 'key2': 'value2'}

• my_dict = {'key1': 'value1'}

• my_dict = {'key1', 'value1'}

• my_dict = {'key1': 'value1', 'key2': 'value2', 'key3': 'value3'}

Answer explanation

To create a dictionary in Python, use the format my_dict = {'key1': 'value1', 'key2': 'value2'}. This format assigns values to specific keys.

Can you modify a tuple after it has been created? Why or why not?

• Yes, you can

• Only if you convert it to a list first

• It depends on the programming language

• No

Answer explanation

No, you cannot modify a tuple after it has been created because tuples are immutable in the programming language.

What is a set in Python and how is it different from a list?

• A set in Python is different from a list because it maintains the order of elements

• A set in Python is similar to a list because it allows duplicate elements

• A set in Python is a data structure used for indexing elements

• A set in Python is different from a list because it does not allow duplicate elements and does not maintain the order of elements.

Answer explanation

A set in Python is different from a list because it does not allow duplicate elements and does not maintain the order of elements.

Explain the concept of keys and values in a dictionary.

• Values are unique identifiers in a dictionary, while keys are the associated data.

• Keys and values in a dictionary are interchangeable.

• Keys are unique identifiers in a dictionary, while values are the associated data.

• Keys are values in a dictionary, while values are unique identifiers.

Answer explanation

Keys are unique identifiers in a dictionary, while values are the associated data.

What happens if you try to access a key that does not exist in a dictionary?

• AttributeError

• TypeError

• KeyError

• ValueError

Answer explanation

If you try to access a key that does not exist in a dictionary, a KeyError will be raised. This error indicates that the key you are trying to access is not present in the dictionary.

How do you check if a specific element is present in a set?

• element.set_name

• set_name.contains(element)

• element in set_name

• element not in set_name

Answer explanation

To check if a specific element is present in a set, you use the syntax 'element in set_name'. This is the correct way to verify membership in a set.