javaPlease explain the TEST-CASE in short sentence for the code in the attachment. The root element of the binary tree is given to you. Your task is to return1the level order traversal of the Binary Tree's nodes' values – from left to right,level by level./* Class to represent Tree node */class Node {int data;Node left, right;public Node(int item)data = item;left = null;right = null;Below is an illustrated sample of Binary Tree nodes for your reference, whichin-fact is the same example we discussed in the lecture.tree.root ▪ new Node (4);tree.root.left = new Node (2);tree.root.right = new Node (6);tree.root.left.left = new Node(1);tree.root.left.right = new Node (3);tree.root.right.left = new Node (5);tree.root.right.right = new Node (7);Your code will need to return all the nodes of the Binary Tree in Level OrderTraversal fashion - from left to right. That is: 4 2 6 1 3 5 7Level Order Tree Traversal with the help of the Queue data-structure shouldmeet the following complexities as stated below.Time Complexity: 0(n)Space Complexity: O(n)

the level order traversal of the Binary Tree's nodes' values - from left to right, level by level. /* Class to represent Tree node +/ class Node { int data; Node left, right; public Node(int item) data = item; left = null; right = null; Below is an illustrated sample of Binary Tree nodes for your reference, which in-fact is the same example we discussed in the lecture.

the level order traversal of the Binary Tree's nodes' values - from left to right, level by level. /* Class to represent Tree node +/ class Node { int data; Node left, right; public Node(int item) data = item; left = null; right = null; Below is an illustrated sample of Binary Tree nodes for your reference, which in-fact is the same example we discussed in the lecture.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

java

Please explain the TEST-CASE in short sentence for the code in the attachment.

The root element of the binary tree is given to you. Your task is to return
1
the level order traversal of the Binary Tree's nodes' values – from left to right,
level by level.
/* Class to represent Tree node */
class Node {
int data;
Node left, right;
public Node(int item)
data = item;
left = null;
right = null;
Below is an illustrated sample of Binary Tree nodes for your reference, which
in-fact is the same example we discussed in the lecture.
tree.root ▪ new Node (4);
tree.root.left = new Node (2);
tree.root.right = new Node (6);
tree.root.left.left = new Node(1);
tree.root.left.right = new Node (3);
tree.root.right.left = new Node (5);
tree.root.right.right = new Node (7);
Your code will need to return all the nodes of the Binary Tree in Level Order
Traversal fashion - from left to right. That is: 4 2 6 1 3 5 7
Level Order Tree Traversal with the help of the Queue data-structure should
meet the following complexities as stated below.
Time Complexity: 0(n)
Space Complexity: O(n)

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