Oberoi Group of Hotels Intern Interview Questions and Answers

Q1. Self introduction
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Q2. Front office question
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Q3. Hobbie of yourself
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Q4. General knowledge
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Q5. Question and answer
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Round duration - 90 minutes
Round difficulty - Hard

Timing was 11 am. Platform was quite well.

Q1. 
Rat in a Maze Problem Statement
You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...read more
Ans. Bactracking
Approach: We can start the traversal of the paths from the rat’s starting position, i.e. (0,0) keeping track of the visited cells during the traversal. We will recursively go through all the paths possible until the last index of the grid (destination) is reached, and add the path information using which the rat successfully reached the end.
 
Algorithm is as follows:
 
1. Take the starting position of th...read more
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Q2. 
Minimum Cost to Destination
You are given an NxM matrix consisting of '0's and '1's. A '1' signifies that the cell is accessible, whereas a '0' indicates that the cell is blocked. Your task is to compute ...read more
Ans. Backtracking
Maintain a visited array and try to explore all the possibilities with the help of backtracking.
1. Start with (0, 0) and mark it as visited and try to move in all 4 directions.
2. Say at any point we are at (i, j) then the cost of reaching (x,y) will be the minimum of these four cases.
   1. Option 1 -  Left: cost of reaching from (i, j-1)
   2. Option 2 - Right: cost of reaching from (i, j+1)
   3. Option 3 - Up: 1 + cost of rea...read more
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