What are some common algorithms used in computer science?

What are some common algorithms used in computer science?

Some common algorithms include sorting algorithms like QuickSort and MergeSort, search algorithms like Binary Search, and graph algorithms like Dijkstra's algorithm.

Can you explain how QuickSort works?

QuickSort is a divide-and-conquer algorithm. It selects a 'pivot' element and partitions the array into two sub-arrays: elements less than the pivot and elements greater than the pivot. It then recursively sorts the sub-arrays.

What is the time complexity of QuickSort?

The average time complexity of QuickSort is O(n log n), but in the worst case, it can degrade to O(n²) if the pivot is poorly chosen.

Are there any scenarios where QuickSort is not a good choice?

Yes, QuickSort is not ideal for small datasets or when the data is already nearly sorted, as it can lead to inefficient performance.