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Dhaval Dave

Rectangular chocolate bar Create at least one piece which consists of exactly nTiles tiles

July 10, 2014 by Dhaval Dave

Rectangular chocolate bar Create at least one piece which consists of exactly nTiles tiles.

You have a rectangular chocolate bar that consists of width x height square tiles. You can split it into two rectangular … Read More

Filed Under: Array, Flipkart Interview Questions, Hacker Earth Questions, Interview Questions, problem Tagged With: Array, Mathematical

25 horses 5 tracks Find 3 fastest puzzle

June 10, 2014 by Dhaval Dave

Suppose you have 25 horses, and you want to pick the fastest 3 horses out of those 25. In each race, only 5 horses can run at the same time in a race because there

… Read More

Filed Under: Interview Questions, Puzzle Tagged With: Puzzle

Printing Longest Common Subsequence

April 25, 2014 by Dhaval Dave

Printing Longest Common Subsequence

Given two sequences, print the longest subsequence present in both of them.

Examples:
LCS for input Sequences “ABCDGH” and “AEDFHR” is “ADH” of length 3.
LCS for input Sequences “AGGTAB” and

… Read More

Filed Under: Amazon Interview Question, Interview Questions, Microsoft Interview Questions, problem Tagged With: 2d matrix, Dynamic Programming, string

Given a string, find the first character which is non-repetitive

April 13, 2014 by Dhaval Dave

Given a string, find the first character which is non -repetitive i.e that character must not be present anywhere else in the string.

With two different solutions.

Eg : Input : teeterson      
     Output : r, 
… Read More

Filed Under: Hacker Earth Questions, Interview Questions, problem Tagged With: string

flattens 2 D linked list to a single sorted link list

March 27, 2014 by Dhaval Dave

Write a function flatten() which flattens this linked list with each node down sorted link list to a single link list with all the elements in sorted order.

We have given Two methods in O(n^2)

… Read More

Filed Under: Amazon Interview Question, Flipkart Interview Questions, Microsoft Interview Questions, problem Tagged With: Linked List, Merge Sort

Find Pythagorean Triplets in an array in O(N)

March 27, 2014 by Dhaval Dave

Find Pythagorean Triplets in an array

We have an array in which random integers are there. we need to find Pythagorean triplets.
which solves equation a^2 + b^2 = c^2.
Method 1 : Brute Force
… Read More

Filed Under: Amazon Interview Question, Flipkart Interview Questions, Interview Questions, problem Tagged With: Mathematical

Length of the longest substring without repeating characters

March 26, 2014 by Dhaval Dave

Length of the longest substring without repeating characters


Method 1 (Brute Force Method)
We can consider all substrings.
One by one and check for each substring whether it contains all unique characters or not. 

There

… Read More

Filed Under: Amazon Interview Question, Hacker Earth Questions, Interview Questions, problem Tagged With: string

Inorder and Preorder traversals of a Binary Tree given. Output the Postorder traversal of it.

March 25, 2014 by Dhaval Dave

Generate Postorder traversal of Tree from Inorder and Preorder traversal of tree without generating Tree.

Input:
In-order traversal in[] = {4, 2, 5, 1, 3, 6}
Pre-order traversal pre[] = {1, 2, 4, 5, 3, 
… Read More

Filed Under: Adobe Interview Questions, Interview Questions, Microsoft Interview Questions, problem Tagged With: Binary Tree, tree

Amazon Interview On-Campus For Internship – 1

March 25, 2014 by Dhaval Dave

 Amazon Interview On-Campus For Internship – 1

Online Round Coding Question:
Q1. Given a float number 7.64, convert it into the string WITHOUT using any inbuilt function/library.
for eg:
input
float no.: 7.64
output
string:

… Read More

Filed Under: Amazon Interview Question, Interview Experience Tagged With: Amazon

Given a float number convert it into the string WITHOUT using any inbuilt Function

March 25, 2014 by Dhaval Dave

Convert a floating point number to string

Given a float number convert it into the string WITHOUT using any inbuilt Function

Method 1:

class Float2String 
{ 
   public static void main(String[] args) 
   { 
      float f=7.64f; 
      String 
… Read More

Filed Under: Amazon Interview Question, problem Tagged With: string

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