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Interview Process   |   Interview Puzzles / Aptitude
Organization : Amazon
Position : Software Developer

Amazon Interview Process

I applied for the position of Software Developer from my university and the process took two days. If you are applying via other sources, the time may vary. Anyways, finally I was interviewed at Amazon. There are five rounds in total at Amazon - online test, 3 Technical Interview rounds, and HR Interview.

Round 1 - Online Test
In this online test all you will be asked is problems regarding coding. If you know the basics, the round might not be that hard to crack as it is basically acting as a barrier for non-serious candidates.

Round 2 - First Technical Interview Round
Online test was not the only elimination round as it happens at each interview. This first technical interview was not difficult. You will be asked questions based on OS and algorithms majorly. Again, if your concepts are clear, you will crack the round.

Round 3 - Second Technical Interview Round
Expect the difficulty level to rise from here. Again, the algorithm problems were asked and thus you must be prepared thoroughly with them. Also some questions on data structures and networking were asked. One of the question I remember is:
Q. Find median from a stream of flowing numbers.

Round 4 - Third Technical Interview Round
This was the toughest interview round. I was eliminated in this round and could not move to the HR round. I was surprised when they asked me a question regarding parallel computing. I guess their sole motive was to put me under pressure and they managed successfully. Some technical questions I remember:
Q1. Given a string, write a function that prints all the subsets of the string. After that, make the function to return only unique solutions.
Q2. What is the tracking algorithm of the nearest location to some friends that are located in a grid region?

Round 5 - HR Interview
Unfortunately I was not able to get myself to this round and so I can't tell much in detail. Mostly they will be asking about your previous experience if any or the projects that you might have done in your college time. Negotiations can be made here.

How to crack ( Get Into) Amazon Interview

It is really tough to wind up such a big topic briefly. So all I will ask you is to prepare your basics and concepts strongly. If your base is strong you can pull off the interview. Even I managed to get through two technical rounds.

The online test as I said is simple and easy to crack. Thus if you were serious, you will at least get to face people from Amazon. But you need to relax, the people over there are nice. I would like to share my case. In my second technical interview round, I was stuck in a question but I was approaching the right path. So they even encouraged me and helped me reach for the final solution. Thus if you know a bit, don't sit quiet, speak it up.

Focus on the algorithms as the questions were majorly concentrated on that. Questions based on algorithms were asked in all the three technical interviews and thus carry much of importance.

Finally, I would wish luck to all the candidates. Prepare hard and you will definitely crack the Amazon Interview.

Thanks Anmol for sharing the details of your interview.
Send more details and your personal experiences info@gpuzzles.com
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Classic Lateral Thinking Problem

There are two glasses in front of you. One of the glasses is full of coke and the other glass is full of lemonade. You take a spoonful of coke and mix it into the glass of lemonade. Now the lemonade glass has a mixture of coke and lemonade. You take a spoonful of that mixture and mix it inside the coke glass.

Now what do you think? - The glass with coke has more quantity of lemonade or the glass with lemonade have more quantity of coke mixed with it?

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Unique Brain Teaser

It takes ten minutes to fry a steak (five minutes for each side). You are frying the steaks in a pan that can accommodate only two steaks at one time. What is the least amount of time by which you can fry all the three steaks you have?

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Pirates Probability Brain Teaser

You are stuck with the pirates who might even kill you on board. They give you a chance to survive. There are hundred black rocks and hundred red rocks. There are two empty sacks which are labelled as heads and tails respectively. You have to divide the rocks in two bags as per your wish. Then a fair coin will be flipped. If its heads, you will have to pick a rock on random from the sack labelled heads and if its tails, you will pick up from the tails sack. If you pick up a black rock, you will be freed and if you pick up a red rock, you will be killed.

How will you distribute the rocks so that your chances of survival are the best?

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Cool Equation Riddle

If 1 + 9 + 11 = 1, Then what is the value of

12 + 11 + 9 = ?

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No Death Penalty For Kill Riddle

Ramsay was killed by Sansa in front of everyone but the judge was not sure how to punish Sansa. Why is the judge confused?

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Very Hard Math Question

There stand nine temples in a row in a holy place. All the nine temples have 100 steps climb. A fellow devotee comes to visit the temples. He drops a Re. 1 coin while climbing each of the 100 steps up. Then he offers half of the money he has in his pocket to the god. After that, he again drops Re. 1 coin while climbing down each of the 100 steps of the temple.

If he repeats the same process at each temple, he is left with no money after climbing down the ninth temple. Can you find out the total money he had with him initially?

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Spot The Difference Christmas Tree Riddle

Can you spot 5 differences in two Christmas tree below?

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Lateral Thinking Problem

Suppose there is a Christmas tree and four angels are sitting on it amidst the other ornaments. Two of them have black halos and two of them have white halos. No body among them can see above their head. Angel A is sitting on the top branch and can see angels B and C sitting below him. B can see C who is sitting in a branch lower than his. Angel D is at the base of the tree and can't be seen due to the branches in between. Also, he can't see anybody as well.

If they are asked to guess the color of their own halo (they dont know that), who do you think will be able to deduce and speak up first with a right answer?

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Hard Ten Boxes Interview Puzzle

You have ten boxes and an electronic weighing machine. In those ten boxes, you have chocolates. Each chocolate weigh 20 grams. But in one box the chocolates are defective and each weigh 19 grams exactly.

Now you can weigh in the electronic weighing machine but you can use that machine just once. How will you find out which box has the defected chocolates.

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Tricky Logic Question

A claustrophobic person boards a train that is just about to enter a tunnel.

Which place will be the best for him to sit?

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