I am a guy from CSE dept, IIT-BHU and currently in 4th year. I am placed in microsoft now and all the credit goes to geeksforgeeks for sharpening and improving my coding skills. Thanks a lot guys for such a wonderful site. Below is my interview experience, if its of any help to my fellow job seekers.
Written Round 1 :
50 multiple choice questions in 60 mins time. Had 2 sections – Aptitude and Programming Ability.
Written Round 2 : 3 coding questions in 1 hour.
1. Swap every consecutive odd and even positioned bit in a number.
Ex:- 10101011010101 = 01010111101010
2. Given a binary search tree . Convert it into a doubly linked list in place (no extra space) such that prev points to left child and next points to right child.
3. Given a linked list that contains 0,1 and 2 . Sort this linked such that it contains 0s first, then 1s and then 2s in O(n) time. Ex:- 2->2->1->0->0->2->1->1->0 = 0->0->0->1->1->1-2->2->2
PI round 1 (Technical):
1. About urself, most challenging project of all you have done and about ur internship.
2. Remove from string s1, all the characters that are present in string s2.
S1=”abcde” s2=”xyazbx” Ans. S1= ”cde”
3. Reverse alternate k nodes in an linked list.
Ex:- 1->2->3->4->5->6->7->8 if k=2; then return 2->1->3->4->6->5->7->8
4. Always ask some questions to the interviewer at the end. That’s a good gesture.
5. Write test cases for the programs above and see if ur program covers all the test cases or not.
PI round 2 (Program manager)
1. Design a tic-tac-toe game for multiplayer on a smartphone.
2. Design a vending machine for blind and deaf.
PI round 3 (Technical)
2. Remove duplicates from a string in place. Ex-microsoft -> microsft
3. Some question on recursive functions using memoization technique for optimization.
PI round 4 (Testing)
1. Given a func :: int *strcmp(char *s1,char *s2);
Write test cases to check functionality and security issues and even automate the
generation of test cases.
2. Given a func :: int typeOfTriangle(int side1,int side2,int side3); (func gives a number for the type of triangle)
Write test cases to check functionality and security issues and even automate the generation of test cases.
3. WAP to reverse words in a sentence.
I am a good boy -> boy good a am i
4. WAP to get the next higher palindrome of a given number.
123 -> 131 1232 -> 1331
PS – Functional issues are test cases that check the functionality of the program and Security issues are the ones where the program may crash.
PI round 5 (Technical)
1. WAP to check if a binary tree is a BST or not.
2. WAP to find Least Common Ancestor of two nodes in a BST.
3. Reverse every two nodes in a linked iteratively and recursively.
PS- Whenever u write a program be sure to cover all the corner cases and write it in a proper indented way. As interviewers ask to write testcases for the program u have written and then check if ur program covers all the test cases.
All the best fellas !!!
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