Vamaship Software Engineer Interview Questions and Answers

Will be given Requirement to write code for Restraunt. Based on that have write code for delivering orders by delivery boys.

Q1. OOPS Concepts, Java Basics, Collections, MultiThreading
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Q1. Shortest path sum with negative integers allowed in matrix. Path starts from top left to bottom right.
Ans. 
Use dynamic programming to find the shortest path sum with negative integers allowed in a matrix.
• Implement dynamic programming to store the minimum sum at each cell

• Consider negative integers when calculating the sum of the path

• Start from the top left cell and iterate through the matrix to find the shortest path sum
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Q1. Write spring code
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Spring code is used for building Java applications with ease and efficiency.
• Use @ComponentScan annotation to automatically detect and register Spring beans

• Use @Autowired annotation for dependency injection

• Use @RequestMapping annotation to map HTTP requests to specific handler methods
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Q2. Design pattern questions asked
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Q1. Tell me about yourself.
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Q1. Given a string, find the longest length palindromic substring in the given string.
Ans. 
Find the longest palindromic substring in a given string.
• Use dynamic programming to solve the problem efficiently.

• Start with the base cases of single characters and two characters.

• For longer substrings, check if the first and last characters match and if the substring between them is also a palindrome.

• Keep track of the longest palindrome seen so far.

• Time complexity: O(n^2), space complexity: O(n^2).
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Q1. Mention the most challenging technical problem you had to solve.
Ans. 
Developing a real-time data processing system for a high-traffic website.
• Designing a scalable architecture to handle the high volume of incoming data.

• Optimizing the data processing algorithms to minimize latency.

• Ensuring data consistency and accuracy in a distributed system.

• Implementing fault-tolerant mechanisms to handle system failures.

• Testing and debugging the system under various load conditions.
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Q2. Some minor low level entity design.
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Q1. How to optimize build in Angular?
Ans. 
Optimizing build in Angular involves reducing bundle size, enabling lazy loading, using AOT compilation, and leveraging tree shaking.
• Reduce bundle size by removing unused code and optimizing imports

• Enable lazy loading to load modules on demand instead of all at once

• Use Ahead-of-Time (AOT) compilation to pre-compile templates and reduce runtime overhead

• Leverage tree shaking to eliminate dead code and reduce bundle size
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Q1. Golang specific question regarding worker pool implementation
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