From 0 to 1 Data Structures & Algorithms in Java - The Binary Heap - Making It Real With Code

The video tutorial explains the structure and implementation of binary heaps using arrays. It introduces the heap base class, which serves as a parent class for both min and max heaps, and discusses its abstract and generic nature. The tutorial covers methods for calculating left and right child indices, as well as the parent index, in a heap. It also highlights various helper methods available in the heap base class, such as swapping elements and checking heap properties.

What is the primary reason for creating a heap base class?

• To avoid writing duplicate methods for min and max heaps

• To ensure that heaps can only store integers

• To make the code more complex

• To prevent the use of arrays in heap implementation

Why must the generic type in the heap base class extend Comparable?

• To enable comparison of elements for priority determination

• To allow the heap to store only strings

• To make the heap elements immutable

• To ensure the heap can only be implemented in Java

What formula is used to calculate the left child index of a node?

• index + 1

• index - 1

• 2 * index + 1

• 2 * index - 1

What condition indicates that a node does not have a valid left child?

• Left child index is less than zero

• Left child index is greater than or equal to count

• Left child index is equal to zero

• Left child index is equal to count

How is the parent index of a node calculated?

• Using the formula index / 2

• Using the formula (index - 1) / 2

• Using the formula index + 2

• Using the formula index * 2

What is the purpose of the swap method in the heap base class?

• To add new elements to the heap

• To swap two elements within the heap array

• To remove elements from the heap

• To sort the heap elements

Which method checks if the heap is empty?

• getElement()

• getSize()

• isEmpty()

• isFull()