Amazon Internship Interview Experience | On-Campus 2021

Amazon arrived for hiring in the last week of Sept 2021 on our campus for the 6 months Software Development Engineer Role. We had a total of 3 rounds (1 Online Coding on Amazon’s Assessment Portal + 2 Technical Interviews).

Round 1: Online Assessment Round

The coding round comprised of 4 sections:

• Debugging: We had to choose a language and debug up to 10 questions most probably. Codes were very basic like sorting, etc.
• Coding: There were two medium-hard level questions.
• Work-style Assessment
• Aptitude: 25 aptitude questions (most probably)

Round 2: Technical Interview Round 1

• Next Greater Frequency of Element: same as next greater element but print greater frequency instead. I was asked to write only the function.

Eg - 1 1 2 1 3 2  ->  -1 -1 1 -1 1 -1

• Design a data structure that does insert, delete, max, min deletes max, delete min operations in less time complexity preferred O(1) (with duplicate elements),.I answered accordingly as given in GFG using a doubly-linked list and min and max heaps. But he asked for a more optimized delete min/max operation in O(1) but I wasn’t able to come up. He explained to me that we could use one more data structure to store addresses of the elements in the heaps. I was asked only the intuition.

Round 3: Technical Interview Round 2

1. Clone a Binary tree having random pointers The structure of the node was already provided.
2. Tell me about any technology that you have started learning or have worked on recently – Use the STAR method to explain. I was from ECE so I was also allowed to speak about any technology which may be related to ECE too.

Tips:

• Start from brute force and keep on optimizing when asked.
• Speak while coding or thinking.
• Repeat the question how you have understood it.
• Keep track of edge cases.
• Use STAR method for behavioral questions.

I guess they didn’t ask me any theory as I was from ECE and also not much time was left. Don’t take it for granted, it’s just an assumption of mine.

Verdict: Selected