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Algorithm - Interview Questions and Answers for 'Deloitte' - 4 question(s) found - Order By Newest

 Q1. Write an algorithm / Java Program to show duplicates in an array of n elements? Algorithm
Ans. int duplicateArray[] = { 1, 2, 2, 3, 4, 5, 6, 8, 9}
Set unique = new HashSet();
for (int i = 0; i < duplicateArray.length; i) {
if (unique.contains(duplicateArray[i])) {
System.out.println(duplicateArray[i]);
} else {
}
}

Complexity O(n) = nHashSet contains and add has O(n) = 1

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coding  code     Asked in 2 Companies

 Q2. What is a binary tree ? Algorithm
Ans. Binary tree is a tree in which each node has up to two children.Tree is a data structure composed of nodes.Each tree has a root node(not necessary in graph theory). The root node has zero or more child nodes.Each child node has zero or more child nodes, and so on.The tree cannot contain cycles.

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binary tree     Asked in 1 Companies

 Q3. Write an algorithm / java program for Heap Sort ? Algorithm

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sorting  heap sort     Asked in 1 Companies        frequent

 Q4. Write code to sort an array. Algorithm

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array  sorting     Asked in 16 Companies      basic        frequent

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