When it would be optimal to prefer Red-black trees over AVL ...

MCQ

When it would be optimal to prefer Red-black trees over AVL trees?

when there are more insertions or deletions

when more search is needed

when tree must be balanced

when log(nodes) time complexity is needed

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MCQ

Consider the below formations of red-black tree. All the below formations are incorrect for it to be a redblack tree. Then what may be the correct order?

data-structure-questions-answers-red-black-tree-q3

50-black root, 18-red left subtree, 100-red right subtree

50-red root, 18-red left subtree, 100-red right subtree

50-black root, 18-black left subtree, 100-red right subtree

50-black root, 18-red left subtree, 100-black right subtree

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MCQ

Can a tree stored in an array using either one of inorder or post order or pre order traversals be again reformed?

yes just traverse through the array and form the tree

No we need one more traversal to form a tree

No in case of sparse trees

None of the mentioned

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What is one of the most common operations that is performed on trees?

Traversal of nodes

Threads

Pointers

None of the above

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MCQ

Consider the below left-left rotation pseudo code where the node contains value pointers to left, right child nodes and a height value and Height() function returns height value stored at a particular node.
What is missing?

avltree leftrotation(avltreenode z):
   avltreenode w =x-left
   x-left=w-right
   w-right=x
   x-height=max(Height(x-left),Height(x-right))+1 
   w-height=max(missing)+1   
  return w

Height(w-left), x-height

Height(w-right), x-height

Height(w-left), x

Height(w-left)

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What is a Cartesian tree?

a skip list in the form of tree

a tree which obeys cartesian product

a tree which obeys heap property and whose inorder traversal yields the given sequence

a tree which obeys heap property only

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Binary Trees

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Heaps

Hash based structures

Graphs

Mixed

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