Got a call from Amazon Dublin HR. She provided one link for online assesment within a week.
There were two questions..

1. Lexicographical order of word from an alien dictionary. (LC)
2. Variation of Trie data structure (Something like from prefix show words)
   I was able to solve both on time..but some cases were not passing for 2nd question.

Within a week i got a call for first telephonic round. I took some time of 15 days to prepare it.
Discussion started with current projects related.
A lot of LP questions..

1. Tell me a situtation where you have incomplete information and with that you have to move ahead.
2. Tell me a situation when customer was not happy.
3. Have you failed in your project?
   First 35-40 mins they discussed only these questions. At last they gave problem to sort multiple sorted array.
   As time was around 10 mins..i just wanted to solve the question and told them that will sort
   by taking two arrays at a time and then sort them. And then merge the sorted array with next array..they said its ok, and asked to implement that. I was able to code that within 5 mins.
   (By the time code was completed, i had other solution in mind using min heap), but then they just stopped the interview by asking if there is any question to ask.
   I don't know what i lacked, based on what they rejected..there is no feedback mechanism from Amazon. If anyone of you guys can help me out here..will be of great help.