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Welcome to the Trees MCQs Page

Dive deep into the fascinating world of Trees with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Trees, a crucial aspect of Data Structures and Algorithms. In this section, you will encounter a diverse range of MCQs that cover various aspects of Trees, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Data Structures and Algorithms.

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Check out the MCQs below to embark on an enriching journey through Trees. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Data Structures and Algorithms.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Trees. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Trees MCQs | Page 19 of 32

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Q181.
What is the space complexity of the post-order traversal in the recursive fashion? (d is the tree depth and n is the number of nodes)
Discuss
Answer: (d).O(d)
Q182.
To obtain a prefix expression, which of the tree traversals is used?
Discuss
Answer: (b).Pre-order traversal
Q183.
Select the code snippet which performs in-order traversal.
a)

public void inorder(Tree root)
{
 System.out.println(root.data);
 inorder(root.left);
 inorder(root.right);
}

b)

public void inorder(Tree root)
{
 inorder(root.left);
 System.out.println(root.data);
 inorder(root.right);
}

c)

public void inorder(Tree root)
{
 System.out.println(root.data);
 inorder(root.right);
 inorder(root.left);
}

d) None of the mentioned

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (b).b
Q184.
Select the code snippet which performs level-order traversal.
a)

public static void levelOrder(Tree root) 
{  
    Queue<Node> queue=new LinkedList<Node>();  
    queue.add(root);  
    while(!queue.isEmpty())  
    {  
        Node tempNode=queue.poll();  
        System.out.println("%d ",tempNode.data);  
        if(tempNode.left!=null)  
        queue.add(tempNode.left);  
        if(tempNode.right!=null)  
        queue.add(tempNode.right);  
    }  
}

b)

public static void levelOrder(Tree root) 
{  
    Queue<Node> queue=new LinkedList<Node>();  
    queue.add(root);  
    while(!queue.isEmpty())  
    {  
        Node tempNode=queue.poll();  
        System.out.println("%d ",tempNode.data);  
        if(tempNode.left!=null)  
        queue.add(tempNode.right);  
        if(tempNode.right!=null)  
        queue.add(tempNode.left);  
    }  
}

c)

public static void levelOrder(Tree root) 
{  
    Queue<Node> queue=new LinkedList<Node>();  
    queue.add(root);  
    while(!queue.isEmpty())  
    {  
        Node tempNode=queue.poll();  
        System.out.println("%d ",tempNode.data);  
        if(tempNode.right!=null)  
        queue.add(tempNode.left);  
        if(tempNode.left!=null)  
        queue.add(tempNode.right);  
    }  
}

d) None of the mentioned

a.

a

b.

b

c.

c

d.

d

Discuss
Answer: (a).a
Q185.
What is the space complexity of the in-order traversal in the recursive fashion? (d is the tree depth and n is the number of nodes)
Discuss
Answer: (d).O(d)
Q186.
What is the time complexity of level order traversal?
Discuss
Answer: (b).O(n)
Q187.
Which of the following graph traversals closely imitates level order traversal of a binary tree?
Discuss
Answer: (b).Breadth First Search
Q188.
In a binary search tree, which of the following traversals would print the numbers in the ascending order?
Discuss
Answer: (d).In-order traversal
Q189.
The number of edges from the root to the node is called __________ of the tree.
Discuss
Answer: (b).Depth
Q190.
The number of edges from the node to the deepest leaf is called _________ of the tree.
Discuss
Answer: (a).Height

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