Microsoft Interview experience | Set 106

1. Phone Interview

  • Tell me about yourself
  • Questions related to kernels(difference between linux OS/kernel and windows OS/kernel)
  • Difference between Process and thread
// 32 bit architecture
bool isPowerOftwo(int no)
    int i = 1;
    int state = 0;
    int k = 0;

    for (int j = 0; j<32; j++)
        if (state == 0)
            k = no & i;
            if (k != 0)
                state = 1;
            k = no & i;
            if (k != 0)
                return false;

        i = i << 1;

    return true;


bool isPowerOfTwo(int no)

    if (no == 0)
        return true; //this is wrong. it should be false

    if (no < 0)
        return false; // not supported

    if (no & (no-1) == 0)
        return true;

    return false;

2. F2F

  • How many storage types are there in C.
  • How many data types are there in C.
  • Given a file with many strings. Find how many unique anagrams exists. (Hash table, BST and finally TRIE approach).
  • How will you handle large data in a distributed way for the above question.
  • How will you handle large data in one reducer.
  • What are the properties of distributed systems.

3. F2F

  • Implement map reduce program very similar to word count.
  • How will you handle large data in one reducer.
  • How will you distribute data across cluster and data centers.
  • Internals of hadoop.(saving of intermediate files after map phase)

4. F2F

    • Compress a string “aaabbcdddd” to “a3b2c1d4"
    • What this program actually does internally
      void fun() {
      int a = 5;
      int * b = new int(10);
  • What is the effect of this program to multiple threads.
  • Design distributed file system.

5. Leadership round

  • Why you want to change?
  • Discussions around azure business model, revenue model, details of job profile, etc.
  • Given binary tree’s root and a node, find all the ancestors of the node.


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