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Let post order traversal of a binary search tree (BST) is given by VSQTURP. If S < V < Q < P < T < R < U, then the pre-order traversal of the BST is:

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HTET PGT Official Computer Science Paper - 2017
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  1. SVQPTRU
  2. PQSVRTU
  3. SVRUTQP
  4. PRQSUTV

Answer (Detailed Solution Below)

Option 2 : PQSVRTU
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Detailed Solution

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Binary search Tree Inorder always be in Ascending order

Since S < V < Q < P < T < R < U 

Therefore In order traversal is SVQPTRU

Given post order is VSQTURP

Binary Search Tree:

Therefore Pre-order traversal of the binary search tree is PQSVRTU.

The correct answer is option 2

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