First Round (Programming round at HackerEarth)

I have participated in ServiceNow Developer Hiring Challenge conducted on HackerEarth. There were two programming questions in this challenge and I was able to solve both of them. Both of these problems are now present in Hacker Earth practice section. 

Second Round (Technical Telephonic Round)

After few days, I got a call from  ServiceNow HR and they have scheduled telephonic round (Duration 1:30 hr).  Here are the list of questions : 

1. Simple Introduction
2. Java questions on Inheritance and Polymorphism.
3. Implement playSongs() method of class MediaPlayer to play songs in shuffle mode. Each song should be played only once and in random order. Once all the songs are played the method should exit.

class MediaPlayer {
	public void playSongs(Song[] songArray) {
		// Implement you code here
	}
}

class Song {
	
	// constructor and private methods
	
	/**
	 * Only public method of class Song
	 */
	public void play() {
		// Some code to play song
	}
}

Note : You need to call play() method of Song class to play each song. All other methods of class Song is private and not accessible from outside the class.

4. Design application like Splitwise.
   – List down design patterns and data structures which you will use in this application.
   – Also write method to minimize the number of transactions in a group. (Like 'Simplify Group Debts' in Splitwise) 
5. Few Object Oriented Principles like Composition, Aggregation, Cohesion 
6. Few general questions like, what is ITSM domain

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