Understanding Lists in Python

The video introduces lists in Python, explaining their power as data structures. It covers list indexing, allowing access to elements by their position, and demonstrates how lists can contain mixed data types. The video also explains how variables can reference the same list, affecting changes across references, and how to properly copy lists to avoid this. Practical examples and functions like appending elements are shown to illustrate list manipulation.

What is a list in Python?

• A sequence of elements that can be of different types

• A sequence of characters

• A function in Python

• A single integer value

How do you access the first element of a list in Python?

• Using the index -1

• Using the index 0

• Using the keyword 'first'

• Using the index 1

What is the result of setting a[3] = 'text' in a list a?

• The list becomes a string

• The first element is replaced with 'text'

• The third element is replaced with 'text'

• The list is cleared

What is the result of the operation a[0] = [-1, -2]?

• The first element becomes a list

• The list is sorted

• The list is cleared

• The list is reversed

What happens when you assign one list to another, like c = b?

• The list is reversed

• The original list is deleted

• Both variables point to the same list

• A new list is created

How can you create a copy of a list in Python?

• Using the reverse() method

• Using the assignment operator

• Using slicing

• Using the copy() method

If you change an element in list b, which is a reference to list a, what happens to list a?

• List a is also changed

• List a is deleted

• List a remains unchanged

• List a becomes empty

What is the effect of using slicing like c = b[:]?

• Creates a reference to b

• Creates a copy of b

• Deletes b

• Reverses b

What does the append() method do in a list?

• Clears the list

• Removes the last element

• Sorts the list

• Adds an element to the end

Which of the following is a valid operation on a list?

• Subtracting an element

• Dividing the list by a number

• Appending an element

• Multiplying the list by a string