International Game Technology Senior Software Engineer Interview Questions and Answers

Machine coding, asked about JS concepts

Q1. System design: asked about previous projects
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Q1. Prefer not to due to NDA
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Brush up on DS and Algorithms

Q1. Hiring manager round
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Q2. Questions on previous projects
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Q1. Longest subsequence with sum zero
Ans. 
Find the longest subsequence in an array with sum zero.
• Iterate through the array and keep track of the running sum.

• Store the running sum in a hashmap along with the index.

• If the same sum is encountered again, the subsequence between the two indices has a sum of zero.
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Q2. Find diameter of tree
Ans. 
The diameter of a tree is the longest path between two leaf nodes in the tree.
• Calculate the longest path between two leaf nodes in the tree

• This can be done by finding the height of the left and right subtrees and adding them together

• The diameter of the tree is the maximum of either the diameter of the left subtree, the diameter of the right subtree, or the sum of the heights of the left and right subtrees
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Q1. System design: Hotel booking system
Ans. 
Design a hotel booking system for managing reservations and availability.
• Use a database to store hotel information, room availability, and reservations.

• Implement user authentication and authorization for booking.

• Include a search feature for users to find available rooms based on their criteria.

• Allow users to make reservations, modify or cancel them.

• Send confirmation emails to users after successful bookings.
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Divide one big integer by another

Q1. Basics of android and java
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Ds related questions

Q1. All Android (Java and kotlin)
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Q1. Past projects,android,kotlin
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Q1. About Salary discussion
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Q1. Merge sorted arrays
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Q1. Checking cache using python
Ans. 
Use Python's built-in 'functools' module to check cache for function results.
• Import 'functools' module

• Use 'lru_cache' decorator to cache function results

• Specify 'maxsize' parameter to limit cache size

• Use 'cache_info()' method to get cache statistics
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Q1. C# fundamentals, database
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Q1. Behavioural question
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Q1. Array,linked list,basic dsa
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DSA, linked list, unity movement code,basic unity questions

Q1. Salary expectations and basic info were asked
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Q1. Given array of integer create subarray with sum = 0
Ans. 
Create subarrays with sum = 0 from given array of integers.
• Iterate through the array and keep track of the running sum.

• Store the running sum in a hashmap and check if the current sum - any previous sum equals 0.

• If yes, then the subarray between those two indices has a sum of 0.
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Q2. Left view of binary tree
Ans. 
The left view of a binary tree is the set of nodes visible when the tree is viewed from the left side.
• Traverse the tree in a level order manner and keep track of the first node at each level.

• Use a queue to store nodes at each level and update the left view nodes accordingly.

• Example: For a binary tree with root node 1, left child 2, and right child 3, the left view would be [1, 2].
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