From 0 to 1 Data Structures & Algorithms in Java - Heap Sort Phase II - The Actual Sort

From 0 to 1 Data Structures & Algorithms in Java - Heap Sort Phase II - The Actual Sort

Assessment

Interactive Video

•

Information Technology (IT), Architecture

•

University

•

Practice Problem

•

Hard

Created by

Wayground Content

FREE Resource

The video tutorial explains the process of heapifying an unsorted array and implementing heap sort. It covers helper methods for heap operations, such as calculating child and parent indices and swapping elements. The percolate down method is detailed, showing how it maintains the heap property. The tutorial then demonstrates the two phases of heap sort: heapifying the array and transforming it into a sorted array. Finally, it discusses the code for heapsort and analyzes its time and space complexity.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula to find the left child index in a heap implemented using an array?

2 * index + 1

index / 2

2 * index

index - 1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula to find the right child index in a heap implemented using an array?

2 * index + 2

index / 2 + 1

index - 2

2 * index

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the percolate down method in a heap?

To move an element to the correct position within the heap

To find the maximum element in the heap

To swap the root with the last element

To calculate the height of the heap

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main difference between percolate down and sift down?

Sift down is used for min-heaps

Percolate down is faster

There is no difference; they are interchangeable terms

Percolate down is used for max-heaps

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During the heapify process, from which node do we start percolating down?

The root node

The last leaf node

The parent of the last leaf node

The node with the smallest value

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the heap sort process, what happens to the largest element in the heap?

It is left unchanged

It is swapped with the last element and moved to the sorted portion

It is removed from the heap

It is moved to the beginning of the array

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in the heap sort process?

Heapify the unsorted array

Find the maximum element

Sort the array using quicksort

Divide the array into two halves

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