Data Structures and Algorithms The Complete Masterclass - Selection Sort

The video tutorial explains the selection sort algorithm, contrasting it with bubble sort. In selection sort, the smallest element is repeatedly selected and placed at the beginning of the list, minimizing swaps. The process involves iterating through the list, comparing elements, and swapping only when necessary. The tutorial provides a step-by-step example of sorting a list using selection sort, highlighting the importance of tracking the minimum value and reducing unnecessary swaps. The video concludes with a summary and a preview of the next lecture, which will visualize the selection sort process.

What is the primary difference between bubble sort and selection sort?

• Selection sort uses recursion, while bubble sort does not.

• Selection sort is faster than bubble sort in all cases.

• Bubble sort involves more swaps, while selection sort minimizes swaps.

• Bubble sort selects the smallest element, while selection sort selects the largest.

In selection sort, when do you perform a swap?

• After sorting the entire list

• Only after finding the smallest element in the unsorted portion

• After each comparison

• Before any comparisons

What is the initial step in each iteration of selection sort?

• Select the largest element

• Select the smallest element

• Swap the first and last elements

• Reverse the entire list

How does selection sort ensure that the list is sorted?

• By recursively sorting sublists

• By using a stack to manage elements

• By gradually increasing the sorted portion of the list

• By sorting elements in pairs

What should be remembered while implementing selection sort?

• Sort the list in descending order

• Always swap elements after each comparison

• Use recursion to handle large lists

• Use index values to track positions