Seven Bits Technologies Software Engineer Interview Questions and Answers

Test was based on arrays and some dsa concepts.

Q1. Design and implement LRU cache?
Ans. 
LRU cache is a data structure that maintains the least recently used items in memory for efficient access.
• Use a combination of a doubly linked list and a hashmap to store and access the cache items.

• When a new item is accessed, move it to the front of the linked list to mark it as the most recently used.

• If the cache is full, remove the least recently used item from the end of the linked list and the hashmap.
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Coding and aptitude round

Q1. Tree dsa questions
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Q1. Horse race question
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Q1. Location specific question
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Q1. Projects, previous work , dsa and database
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Q1. System design , dsa
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Q1. Behavioural, system design
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Q1. General discussion , salary
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Asked about data interpretation and all these.

Coding test is based on DSA mainly.

There was a hacker rank assignment

Leetcode style question, medium

Q1. Internal Implementation of HashMap
Ans. 
HashMap is implemented using an array of linked lists to handle collisions.
• HashMap stores key-value pairs in an array of linked lists

• Hash function is used to determine the index of the array where the key-value pair will be stored

• Collision handling is done by chaining, where multiple key-value pairs with the same hash value are stored in the same linked list

• HashMap allows null keys and values

• HashMap is not synchronized...read more
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Q1. System design question normal
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Coding question of moderate difficulty