Python Lists Quiz: Test Your Knowledge of Python Data Structures

📚 Quick Study Guide

• 💡 What are Lists? Lists are ordered, mutable collections of items. They are one of the most versatile data structures in Python and can hold elements of different data types.
• 🔢 Indexing & Slicing: Elements in a list are accessed by their index, which starts at 0. Slicing allows you to extract a sub-list using `[start:end:step]`. Negative indexing can be used to access elements from the end of the list.
• ➕ Common Operations:
  • ✨ append(item): Adds a single item to the end of the list.
  • 🗑️ insert(index, item): Inserts an item at a specified index, shifting subsequent elements.
  • ✂️ pop(index): Removes and returns the item at a given index. If no index is specified, it removes and returns the last item.
  • ❌ remove(value): Removes the first occurrence of a specified value from the list.
  • 📏 len(list): Returns the number of items in the list.
  • 🔄 sort(): Sorts the list in-place (modifies the original list).
  • ↩️ reverse(): Reverses the order of elements in the list in-place.
  • ➕ + operator: Used to concatenate (join) two or more lists.
  • ✖️ * operator: Used to repeat a list a specified number of times.
• 🧐 Mutability: Lists are mutable, meaning their elements can be changed, added, or removed after the list has been created.
• 🧠 Nested Lists: Lists can contain other lists, allowing for the creation of complex, multi-dimensional data structures.

📝 Practice Quiz

1. Which of the following is the correct way to create an empty list in Python?

1. my_list = {}
2. my_list = ()
3. my_list = []
4. my_list = new list()

2. What is the output of my_list = [10, 20, 30]; my_list.append(40); print(my_list)?

1. [10, 20, 30]
2. [10, 20, 30, 40]
3. [40, 10, 20, 30]
4. Error

3. How do you access the element 'banana' from the list fruits = ['apple', 'banana', 'cherry']?

1. fruits[2]
2. fruits.get(1)
3. fruits[1]
4. fruits(1)

4. What will be the value of my_list after my_list = [1, 2, 3, 4, 5]; my_list.remove(3);?

1. [1, 2, 4, 5]
2. [1, 2, 3, 4]
3. [1, 2, 5]
4. Error

5. Which method is used to add an element at a specific index in a list?

1. add()
2. push()
3. insert()
4. put()

6. What is the output of list1 = [1, 2, 3]; list2 = [4, 5]; list3 = list1 + list2; print(list3)?

1. [1, 2, 3, 4, 5]
2. [1, 2, 3], [4, 5]
3. [[1, 2, 3], [4, 5]]
4. Error

7. Lists in Python are:

1. Immutable and unordered
2. Mutable and ordered
3. Immutable and ordered
4. Mutable and unordered