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Microsoft Software Development Engineer In Test (SDET) III Interview Questions

Interviews at Microsoft

3 Interview Reviews

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Software Development Engineer In Test (SDET) III Interview

Anonymous Interview Candidate in Redmond, WA
No Offer
Negative Experience
Difficult Interview

Application

The process took 1 day. I interviewed at Microsoft (Redmond, WA) in January 2010.

Interview

Phone interview about general work history led to in person meeting. Question asked: In a given string find the last unique character. My answer was to filter out special cases (empty string, null string, blank string, single character string...) Some of this required firming up requirements (e.g. What do you return with a null string?) Interviewer's eyes rolled when I asked this and I was told to not worry about it, just code the answer.

The actual coding was to be done on a whiteboard. My solution was to start from the end of the string and loop backwards. For each character compare the first index position against the last index position of the same character. If first and last index positions were the same the character was unique. Since I started from the end of the string the first time this happened was the last unique character. When that happened you dropped out of the loop and returned the answer.

I was told that this was wrong. The way to do it was to run through the loop and hash the characters and keep track of the current last hash created. When you finished the loop the last hash created was the last unique character. We talked about the big O values of each method

Overall the interview was difficult. The interviewer gave the impression their time was being wasted right from the start.

Interview Questions

  • Find the last unique character in a character string   1 Answer

Other Interview Reviews for Microsoft

  1.  

    Software Development Engineer In Test (SDET) III Interview

    Anonymous Interview Candidate in Redmond, WA
    No Offer
    Positive Experience
    Difficult Interview

    Application

    I applied through a staffing agency. The process took a week. I interviewed at Microsoft (Redmond, WA) in March 2009.

    Interview

    This was a contract position at Microsoft Hardware Software Team. I got contacted through a staffing agency that I worked with. First - I got some screening questions like these:
    1. Create a class Shape and two derived classes Rectangle and Triangle. All of them implement method called edgeCount().
    2. Suppose you have a C++ base class and several classes that inherit from it. What might happen if you do not write a virtual destructor for the base class?
    3. Provide a *robust* function that will accept an array of integers and the length of the array, find the two largest even integers in the array, multiply them together, and return the result.
    Then they invited me for a series of 3 1:1 interviews at their location asking typical Microsoft interview questions, like - find duplicate items in unsorted lists plus some SQL questions like - how to list all addresses for all customers and how joins work between tables.
    For the skills - it is just best to know them and refresh some knowledge - scan through a book on the subject and review anything you might not know or always thought difficult in a particular area (like types of locks and locking levels in SQL).
    For algorithms - it would be a good idea to browse through computational complexity information for common data structures and algorithms (hashtables, binary trees) and try out some common questions (see http://www.careercup.com/).
    Also - be confident and show your real interest in the job - I might have shown I was not so much interested in that position, since I was looking for something a bit different. Now I am still looking and wondering whether I should have shown more enthusiasm for their work.

    Interview Questions

    • Suppose you have a C++ base class and several classes that inherit from it. What might happen if you do not write a virtual destructor for the base class?   2 Answers

  2.  

    Software Development Engineer In Test (SDET) III Interview

    Anonymous Interview Candidate
    No Offer
    Neutral Experience
    Easy Interview

    Application

    I applied through a recruiter. The process took 1 day. I interviewed at Microsoft in June 2010.

    Interview

    A recriuter contacted me for SDET 3 position and I make the interview, the manager asked diffrent question regarding my previous work experience, the challeges i face and how I overcome with the problems. The algorithm question was easy, he asked me to display the first 3 character of a string and asked me to write testcases. I solve the problem with substring from 0 to 3rd character.

    Interview Questions

    • Display the first 3 character of a word(string)   2 Answers
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