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Junior Software Developer Interview Questions

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count the number of duplicates in a binary tree in O(n) time O(1) space.

4 Answers

In order traversal passing down the parent key value to the right child and the previously passed value to the left child, checking for duplicates and adding one to the returned value as you go along.

there is no such info left-right-parent comparision info in a *BT*. I think you are talking about *BST*...

yes you are correct, I meant a BST

abstract Class vs Interface

2 Answers

In three very large arrays, calculate a number common to the same array

1 Answer

DDL SQL queries

1 Answer

Find duplicate value in an array containing 1-100

1 Answer

They asked me to show how I could loop over the words in a sentence backwards.

2 Answers

e.g. write the code to sort an array (actual question was different but of similar type)

1 Answer

what is the purpose of a try catch statement?

1 Answer

if you are hired, what will you do on your first day at work?

3 Answers

Why does .NET not support multiple inheritance?

1 Answer
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