# Data Structure Questions and Answers updated daily – Computer Knowledge

Data Structure Questions: Solved 242 Data Structure Questions and answers section with explanation for various online exam preparation, various interviews, Computer Knowledge Category online test. Category Questions section with detailed description, explanation will help you to master the topic.

## Data Structure Questions

241. A scheme for storing binary trees in an array X is as follows. Indexing of X starts at 1 instead of 0. the root is stored at X[1]. For a node stored at X[i], the left child, if any, is stored in X[2i] and the right child, if any, in X[2i+1]. To be able to store any binary tree on n vertices the minimum size of X should be.

Correct Ans:2^n — 1
Explanation:
For a right skewed binary tree, number of nodes will be 2^n – 1.
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242. In a binary max heap containing n numbers, the smallest element can be found in time

Correct Ans:0(n)
Explanation:
In a max heap, the smallest element is always present at a leaf node. So we need to check for all leaf nodes for the minimum value. Worst case complexity will be O(n)
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