## Microsoft Interview Questions

- 0of 0 votes
Point errors (if any) in the following pointer code and explain what it does...

char* cp(char *a)

{

char *f;

f=(char*)malloc(strlen(a)*sizeof(char));

while(*a != 0)

{

*f=*a;

f++;

a++;

}

cout<< f;

return f;

}

- 0of 0 votes
You are tasked with implementing a method that returns the lowest possible number that could be generated after removing n characters from a string of digits. The method signature should look like:

`public static string GenerateLowestNumber(string number, int n)`

Where the number parameter is a string that contains a number (e.g. “4205123”), and the n parameter represents the number of characters to remove from the string. The goal of this method is to return the lowest number that can be generated by removing n characters from the number provided while keeping the positions of the remaining characters relative to each other the same (i.e. the method should remove n characters from the string, but it cannot re-order the characters).

For example, if number is “4205123” and n is 4, the lowest possible number that can be generated after removing any 4 characters is “012”. If number is “216504” and n is 3, the lowest possible number that can be generated after removing 3 characters is “104”.

- 0of 0 votes
Identify the flaws / limitations in the following ConvertToNumber method:

`public static bool ConvertToNumber(string str) { bool canConvert = false; try { int n = Int16.Parse(str); if (n != 0) { canConvert = true; } } catch (Exception ex) { } bool retval = false; if (canConvert == true) { retval = true; } return retval; }`

- 0of 0 votes
You are tasked with migrating data between two systems that store movie metadata. The first system, which you are to use as input, keeps their movie metadata in the following structure:

MovieName ContributorType ContributorName

Pulp Fiction Director Quentin Tarantino

Pulp Fiction Actor John Travolta

Pulp Fiction Actor Samuel L. Jackson

Titanic Director James Cameron

The second system, which you are to output to, uses the following object for movie information:`class MovieInformation { public string Name { get; set; } public string Director { get; set; } public List<string> Actors { get; set; } }`

The first system provides an IDataReader that lets you access their data. Their data is always sorted on MovieName. You can call Read on the IDataReader to move the cursor to the next entry, and you can call GetString on the IDataReader to get the movie name, contributor type, and contributor name. For example, with the above data, if you were to call:

`MovieDataReader dataReader = new MovieDataReader(); int movieNameOrdinal = dataReader.GetOrdinal( "MovieName" ); int contributorTypeOrdinal = dataReader.GetOrdinal( "ContributorType" ); int contributorNameOrdinal = dataReader.GetOrdinal( "ContributorName" ); while ( dataReader.Read() ) { string movieName = dataReader.GetString( movieNameOrdinal ); string contributorType = dataReader.GetString( contributorTypeOrdinal ); string contributorName = dataReader.GetString( contributorNameOrdinal ); }`

Then at the end of the first iteration of this while loop, movieName would be “Pulp Fiction”, contributorType would be “Director” and contributorName would be “Quentin Tarantino”.

The second system provides a single method for posting movie information to their DB. This method should only ever be called once per movie:`class MovieInformationDatabase { public void SaveMovieInformation( MovieInformation information ) { } }`

Implement a method that migrates all of the data from the first system to the second system

- 0of 0 votes
This was asked in an Online written test that was timed (60 mins). And this question was one among the three.

"Write a method to merge three sorted integer arrays into just one array"

Nothing more or less was given. Since it was a written test I assumed that the 1st array had space towards to end which can fit the other two arrays. I can code this but given the timer limitations (of 20 mins per question) I thought it was a bit too much for me to handle unless there is a more obvious way to do this. I did it using two arrays and using the resultant array, I merged it with the 3rd array. That was the best i could think of at that time.

- 0of 0 votes
Remove duplicates in an array of numbers. You can use a second array or the same array, as the output array. (I used a hash table to do this).

- 1of 3 votes
You have 9 balls. 8 of them weigh the same, but one of them weighs heavier than the other 8.

How can we find the heaviest weighted ball in no more than 2 operations?

- 0of 0 votes
A 2-D array of 1's and 0's is given. Find the row with max 1's. The array is sorted row wise (all 0's in a row are followed by all 1's).

- 0of 0 votes
Given an array with 10000 numbers from the range 1-10. WAP to sort them.

- 0of 0 votes
Describe in terms of computer architecture, how would you optimize running a search on a large database? Assume a PC with regular specs and database size of several terabytes.

- 1of 1 vote
Write a function that does an in-order traversal of a tree and prints out the contents (Assume each node has 1 piece of content which is an integer).

Write this function without using recursion (you can assume a library that has stack/queue/list objects with some standard methods is available for use by you).

What is the maximum size your stack can grow to and what is the expected size that your data structure can grow to assuming that the tree has n nodes?

- 0of 0 votes
Find and fix the bugs in the following function that is supposed to remove the head element from a singly linked list.

`void RemoveHead (node * head) { free(head); head = head - > next; }`

- 0of 0 votes
Write a function that takes a string as an input and outputs an integer, e.g. turning "1234" into 1234.

- 0of 0 votes
Design your own String Pooling system. It should return a String with request of more length. String pool should have strings of different sizes available. When requested, it should just be returned to client and when client is done using string, it should be added back to string pool for other client to use.

- 0of 0 votes
Given a string, write a function to determine whether it is a valid IP address or not. Regex solutions are acceptable, but what other ways can it be done?

boolean isValidIP(String s) {

//code here

}

- 1of 1 vote
A Matrix of 1s and 0s is given, all zeros are water and 1s are land, first find out the number of ponds in the array (Reverse of islands problem). If one change can convert 1s in to zero then find out minimum number of changes that we need to make so that there will be only one pond in matrix..

Any algo how to make 1 pond ?

- 0of 0 votes
You have a chess board of size NxN. You have a horse at a given starting position. You also have a function that gives you all the positions that the horse can reach from it's current position.

Given an ending position, find the path to it that uses the minimum number of moves.

- 1of 1 vote
Given an array of integers when the difference between every two neighbored elements is either -1 or +1 or 0.

Write an efficient search algorithm to find a given number of x in the array.

- 0of 0 votes
Given two string you need to tell whether edit distance between two string is 1 or not.

- 0of 0 votes
Two sorted array of integer are given, you need to find nth rank element from combine array.

- 0of 0 votes
There is a set of n bolts and n nuts given. You have only API that tells whether given nut is smaller or larger then for a bolt no any other relative number. You need to match all nuts and bolts in O(nlogn).

- -3of 3 votes
Given an sorted array having duplicates and another which is not sorted and have duplicates.Find array b is found continuously in array a. if so print position of array b in array a

- 0of 0 votes
How would test this method ?

public static bool DateBetweenDates(DateTime startDate, DateTime endDate, DateTime dateToTest)

{

if (startDate.Year > dateToTest.Year)

return false;

if (endDate.Year < dateToTest.Year)

return false;

if (startDate.Month > dateToTest.Month)

return false;

if (endDate.Month < dateToTest.Month)

return false;

if (startDate.Day > dateToTest.Day)

return false;

if (endDate.Day < dateToTest.Day)

return false;

else

return true;

}

- 0of 0 votes
In a matrix of characters, find an string. String can be in any way (all 8 neighbors to be considered), like find Microsoft in below matrix.

A-C-P-R-C

X-S-O-P-C

V-O-V-N-I

W-G-F-M-N

Q-A-T-I-T

String Microsoft is present in the matrix above ?

There also a slight variation where a diagonal neighbor is not considered.

- 0of 0 votes
Given n rows of integers, such that the ith row (1 <= i <= n) contains i integers, find the path having the maximum weight.

Path traversal rules:

1. A valid path sequence would be top-down i.e. begins with the integer in the first row, and traverses all rows selecting only one integer in each row.

2. From any jth integer in the ith row i.e row[i][j], traversal can happen either downward (i.e to row[i+1][j]) or diagonally downward to the right (i.e to row[i+1][j+1])

The weight of a Path is the sum of values of integers in the Path sequence.

Sample Input:

No. of Rows: 5

4

2 9

15 1 3

16 92 41 44

8 142 6 4 8

Expected Output: 4, 2, 15, 92, 142 (Max weight is 255)

- 1of 1 vote
Java: You're given a very large array of char's. Write a method to remove duplicates in the array, in place. Optimize for space complexity, not time complexity.

- 0of 0 votes
Say you're the development lead for a mobile application. A user submits a bug report saying that something isn't working right even though internal tests show that it should. What do you do?

- 0of 0 votes
write a program to find the minimum value in an unsorted array of integers. how many assignment operations happen within the loop?

- 0of 0 votes
what does this code do?

`unsigned mystery(unsigned x) { unsigned i=0; while(x) { x=x&(x-1); i++; } return i; }`

- 0of 0 votes
write a program to return min value from an unsorted array of integers. How many assignment operations happen within the loop?