Hyster-yale Lift Trucks India Senior Design Engineer Interview Questions and Answers

Spending sometime on Leetcode would help to crack coding test.

Q1. Technical round was very innovative to test hands on experience of candidates.
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It was a easy test with 15 MCQs

Q1. It was a good discussion. Got to learn a lot of new things.
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Q1. It had 1 coding question and 1 DB question
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Q1. Basic spring , Sql questions and a puzzle
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Q1. Questions based on spring boot, annotations, design patterns.
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Q1. Singleton Design pattern, one programming question. Work related questions
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Java 8 feature questions

Q1. Design and Technical questions
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2 questions - one was a basic DP question

Q1. Streams Question
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Q2. Questions related to Java
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Q3. Height of the binary tree
Ans. 
Height of a binary tree is the maximum number of edges on the longest path from the root node to a leaf node.
• The height of an empty tree is -1.

• The height of a tree with only one node is 0.

• The height of a binary tree can be calculated recursively by finding the height of the left and right subtrees and adding 1 to the maximum of the two heights.
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Q4. Minimum spanning tree
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Q1. Sort 0 and 1
Ans. 
Sort an array of 0s and 1s in linear time complexity.
• Use two pointers approach - one from the start and one from the end of the array.

• Swap 0s to the left side and 1s to the right side until the pointers meet.

• Time complexity: O(n), Space complexity: O(1)
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Q2. Implement LRU cache
Ans. 
LRU cache is a data structure that stores the most recently used items, discarding the least recently used items when full.
• Use a combination of a doubly linked list and a hashmap to efficiently implement LRU cache.

• Keep track of the most recently used item at the head of the linked list and the least recently used item at the tail.

• When a new item is accessed, move it to the head of the linked list and update the hashmap...read more
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2 Coding questions and 15 MCQs

Difficulty - Intermediate

Q1. Basic NodeJS related questions
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Q1. System Design questions and coding questions
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Q1. Nodejs fundamental questions and system design
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Q1. Salary discussion and growth expectations
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Q1. NodeJs architecture
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Q2. Middleware in nodejs
Ans. 
Middleware in Node.js is a function that has access to the request and response objects, and can modify or terminate the request-response cycle.
• Middleware functions are executed sequentially in the order they are defined.

• They can be used for tasks such as logging, authentication, error handling, etc.

• Example: Express.js uses middleware to handle requests before they reach the route handler.
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