Create a Binary Tree Manually in DSA Javascript - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new node with value 10.

DSA Javascript

const node = { value: [1], left: null, right: null };

Drag options to blanks, or click blank then click option'

A10

B'10'

Cnull

Dundefined

Attempts:

3 left

💡 Hint

Common Mistakes

Using '10' as a string instead of 10 as a number.

Setting value to null or undefined.

The value of the node should be the number 10, not a string or null.

2fill in blank

medium

Complete the code to assign the left child of the root node to a new node with value 5.

DSA Javascript

root.left = { value: [1], left: null, right: null };

Drag options to blanks, or click blank then click option'

A5

Bnull

C'5'

Dundefined

Attempts:

3 left

💡 Hint

Common Mistakes

Using '5' as a string instead of 5 as a number.

Assigning null or undefined instead of a node.

The left child node should have the numeric value 5.

3fill in blank

hard

Fix the error in the code to assign the right child of the root node to a new node with value 15.

DSA Javascript

root.right = { value: [1], left: null, right: null };

Drag options to blanks, or click blank then click option'

A'15'

B15

Cnull

Dundefined

Attempts:

3 left

💡 Hint

Common Mistakes

Using '15' as a string instead of 15 as a number.

Assigning null or undefined instead of a node.

The value should be the number 15, not a string or null.

4fill in blank

hard

Fill both blanks to create a root node with value 20 and assign its left child with value 10.

DSA Javascript

const root = { value: [1], left: { value: [2], left: null, right: null }, right: null };

Drag options to blanks, or click blank then click option'

A20

B10

Cnull

D'10'

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings like '10' instead of numbers.

Setting left or root value to null.

The root value is 20 and the left child value is 10, both as numbers.

5fill in blank

hard

Fill all three blanks to create a root node with value 30, left child 20, and right child 40.

DSA Javascript

const root = { value: [1], left: { value: [2], left: null, right: null }, right: { value: [3], left: null, right: null } };

Drag options to blanks, or click blank then click option'

A30

B20

C40

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Using null instead of numbers for values.

Using strings instead of numbers.

The root is 30, left child 20, and right child 40, all numbers.