From 0 to 1 Data Structures & Algorithms in Java - Bubble Sort

The video tutorial explains the bubble sort algorithm, highlighting its process of comparing and swapping adjacent elements to sort a list. It visualizes the sorting process, emphasizing the adaptive nature of bubble sort, which allows early termination if the list becomes sorted before completing all iterations. The tutorial also covers the code implementation, explaining the use of nested loops and a swap flag. Finally, it compares bubble sort with selection sort, discussing their complexities and when bubble sort is preferable due to its adaptive nature.

What is the primary mechanism used by bubble sort to sort a list?

• Dividing the list into sublists

• Comparing and swapping adjacent elements

• Using a pivot element

• Merging sorted sublists

In bubble sort, what happens to the smallest element during each iteration?

• It is removed from the list

• It stays in its original position

• It bubbles up to the beginning of the list

• It moves to the end of the list

During the visualization of bubble sort, what is the first step when two adjacent elements are not in order?

• Leave them as they are

• Swap them

• Move them to the end of the list

• Remove them from the list

What is a key advantage of bubble sort over selection sort?

• It uses less memory

• It is faster in all cases

• It requires fewer comparisons

• It can break early if the list is sorted

How does bubble sort determine if the list is already sorted during an iteration?

• By using a helper function

• By checking if no swaps were made

• By counting the number of elements

• By comparing the first and last elements

What is the role of the 'swapped' variable in bubble sort?

• To count the number of swaps

• To track if any swaps were made

• To store the sorted elements

• To divide the list into sublists

What is the time complexity of bubble sort in the worst-case scenario?

• O(n)

• O(n log n)

• O(n^2)

• O(n^3)

What characteristic of bubble sort allows it to maintain the order of equal elements?

• It merges sorted sublists

• It divides the list into sublists

• It uses a pivot element

• It is a stable sort

Why might bubble sort be preferred over selection sort for nearly sorted lists?

• It uses less memory

• It is more adaptive

• It requires fewer comparisons

• It is faster in all cases

What is the space complexity of bubble sort?

• O(n^2)

• O(1)

• O(n)

• O(n log n)