Data Structure

Which of the following statements about Python lists is true?

• Lists are immutable.

• Lists are ordered collections.

• Lists can only contain elements of the same data type.

• Lists use curly braces {} for initialization.

What is the correct way to add an element 'x' to the end of a list my_list?

• 'my_list.add(x)'

• 'my_list.insert(x, -1)'

• 'my_list.extend(x)'

• 'my_list.append(x)'

Which of the following statements is true about tuples in Python?

• Tuples are mutable.

• Tuples are unordered.

• Tuples can be used as keys in dictionaries.

• Tuples use square brackets [] for initialization.

What is the primary difference between a list and a tuple in Python?

• Lists are ordered, and tuples are unordered.

• Lists are mutable, and tuples are immutable.

• Lists can store elements of different data types, while tuples cannot.

• Lists have a fixed size, while tuples can grow dynamically.

Which of the following statements about Python sets is true?

• Sets allow duplicate elements.

• Sets are ordered collections.

• Sets are represented using square brackets [].
  

• Sets automatically sort their elements.

What is the result of the following set operation in Python?

• 'intersection' will be an empty set.

• 'intersection' will contain the elements {1, 2, 3, 4, 5}.

• 'intersection' will contain the element {3}.

• The code will raise an error.

In a Python dictionary, what is the purpose of a key?

• Keys are used to access values.

• Keys are used to store duplicate values.

• Keys are not necessary in dictionaries.

• Keys determine the order of elements.

What will happen if you try to add a duplicate key to a dictionary in Python?

• The new value will replace the old value associated with the key.

• An error will be raised, indicating a duplicate key.

• The dictionary will merge the values associated with the duplicate key.

• Python will automatically increment the key.

How do you access a value in a Python dictionary using its key?

• By using indexing like a list

• By using the value itself

• By using the key as an index

• By using the get() method with the key

What is the primary use of a set in Python?

• Storing key-value pairs

• Storing elements in an ordered sequence

• Storing a collection of unique elements

• Storing elements with both keys and values