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Amazon.com Software Development Engineer In Test I (SDET) Interview Questions

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Software Development Engineer In Test I (SDET) Interview

Anonymous Interview Candidate in Seattle, WA
Anonymous Interview Candidate in Seattle, WA
Application Details

I applied online. The process took a weekinterviewed at Amazon.com in July 2012.

Interview Details

I applied online to many of their job postings, got a call from HR after a month. They had an hiring event , so after HR screening, they called me directly for in-person interview. Interviews started on time. I had 4 technical , 1 behavioral and 1 HR round, each for around 40-45 mins. All the interviewers were very helpful. At no point I felt uncomfortable. When I got stuck, they provided hints to help me arrive at answer. Overall a good experience in interview, they confirmed selection on same day and I got offer letter within a week.

Interview Questions
  • You are given a n*n matrix of bits (1s and 0s) where 1 represents land and 0 represents water. Adjacent 1s can be considered as joined together to form sort of island in water. Count the number of islands. Discuss complexity.   View Answer
  • Consider a rectangular mesh (intersecting horizontal and vertical lines ). These lines represent intersecting roads. You are standing at top left intersection and you need to reach to a resort located at bottom right intersection. On your way, you can see interesting sights which are given points (weightage). You are lazy to walk (i.e. you wont walk left / up. You will only walk to right or down). While reaching resort , you want to cover maximum points (see things that have more weightage). Write a program to calculate maximum number of points that you can cover. He later asked me to improve solution by avoiding paths already visited.   View Answer
  • Write an iterator for binary search tree.   Answer Question
  • You are given a long stream of characters. Write a program to find first non repeating character. Discuss complexity.   Answer Question
  • Design lift (elevator) system.   Answer Question
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