Shine Software Developer Interview Questions and Answers

Q1. LRU Cache - how to tackle
Ans. 
LRU Cache is a data structure that maintains a list of items in order of most recently used to least recently used.
• Implement using a doubly linked list and a hashmap for efficient operations

• When an item is accessed, move it to the front of the list

• When the cache is full, remove the least recently used item from the end of the list
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Q2. LRU Cache implementation based on a real time system. How would the main work which will be called etc etc
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Q1. It was lld question to design a cab booking system.
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Q2. Tell me about yourself
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DSA + JAVA + Spring boot

LLD (bookmyshow) + DSA

Q1. Implement an immutable class.
Ans. 
An immutable class is a class whose instances cannot be modified after creation.
• Use final keyword for class declaration to prevent inheritance

• Make all fields private and final to prevent modification

• Do not provide setter methods, only getter methods should be used
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Q2. Implement a springboot service that intercepts http requests.
Ans. 
Implement a Springboot service to intercept HTTP requests.
• Create a Springboot application with necessary dependencies.

• Implement a custom interceptor by extending HandlerInterceptorAdapter.

• Override preHandle and postHandle methods to intercept requests and responses.

• Register the interceptor in the WebMvcConfigurerAdapter configuration class.
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HAckerrank based test

Medium leet code question

Simple DSA ques. and some mcqs. were easy if you are a cp guy

Q1. Given a string of paranthesis tell longest valid parantheisis
Ans. 
Use stack to keep track of indices of opening parentheses, update max length when closing parentheses found
• Use a stack to keep track of indices of opening parentheses

• When a closing parentheses is found, update max length by calculating the difference between current index and top of stack

• Handle edge cases like extra closing parentheses or unmatched opening parentheses

• Example: Input: "(()()", Output: 4 (for "()()")
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Q2. Leetcode 1443. This was exact ques
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Q1. Given a string find longest palindromeic substring
Ans. 
Find the longest palindromic substring in a given string.
• Use dynamic programming to check for palindromes within the string.

• Start by checking for palindromes of length 1 and 2, then expand to longer substrings.

• Keep track of the longest palindrome found so far.
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Q2. Simple take not take dp ques But my interviewer was an idiot she didn't understand shit She was reading editorial on the fly. As i told her approch she was like its wrong then read editorial and was fine. ...read more
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