Amazon Software Engineer interview questions

2 Phone screens Combined Phone screen time : 90 mins 1'st Interview: 1. Convert 255 to Hexadecimal 2. Difference b/w Overriding and Overloading 3. Abstract Classes/Interfaces 4. Primitive Data types 5. Write a class (and narrate it on phone with syntax), to find if a linked list is a looped linked list or not. Note that looped LL is different from circular LL. Total Interview Time: 40-50 mins. 2'nd Interview: 1. Abstract Class and Interfaces 2. Overriding and Overloading 3. Primitive data types 4. Current Job responsibilities 5. Write a class and narrate it on phone with syntax, which has a method with parameter that takes in a list/array of strings. The method should return a list of Integer values, each denoting which position element of the input array is an anagram (compare to all elements in the list). Total Interview Time: 40-50- mins.

It was two phone interviews. The first one was mainly about basic algorithm and data structures. The interviewer asked about how hash table works, how to count 1's in a binary integer, and multiplication without *. He then asked me to write code on a piece of paper and read it to him. The second interview was about designing a linked list API in C. He emailed me a link to collabedit so there was real-time coding. After listing all functions I was told to implement a cloning function. I got an invitation to on-site interview within the same day.