Atom Technologies Software Consultant Interview Questions and Answers

It was about DS Algo and Java garbage collection,multithreading

Q1. Low level design of rate limiter
Ans. 
Rate limiter is a system that controls the rate of traffic sent or received by a network interface.
• Implement a token bucket algorithm to track and limit the rate of requests

• Use a sliding window algorithm to track the number of requests within a specific time frame

• Consider using a distributed rate limiter for scalability and fault tolerance
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Q2. Springboot basics, java basics, future interfaces, basic sql queries
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Q1. Longest Consecutive Sequence
Ans. 
Find the length of the longest consecutive elements sequence in an array.
• Sort the array to ensure consecutive elements are adjacent

• Iterate through the array and keep track of the current consecutive sequence length

• Update the longest consecutive sequence length as you iterate
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Q2. Core Java Questions
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Q1. Executor Service and it's code
Ans. 
Executor Service is a framework provided by Java for managing and executing asynchronous tasks.
• Executor Service allows you to easily create and manage threads for executing tasks.

• It provides a way to control the number of threads used for executing tasks, which can help prevent resource exhaustion.

• You can submit tasks to an Executor Service using methods like execute() or submit().

• Executor Service can be used to execut...read more
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Q2. Core Java and Spring boot questions
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Q1. Design patterns
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Q2. Core Java questions
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Q1. One leetcode easy-medium problem
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Q2. Java, springboot and oops question
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Q1. Project related questions
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Q2. System design questions
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You should be familiar with core java features. Collections, converting one collection Array / Vector to other. Removing duplicates. Lambda chaining / Functional programming. Basic SQL - Joins, Aggregates etc.

Q1. Explain Architecture of applications you worked on. Justify use of components. System Design questions.
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Maths,quant for 1 hour duration

Arrays, strings, linked list, palindrome

Q1. 1 - Easy Medium Question. Discuss the approach with interviewer and then implement it. The code should work, thats important.
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Q1. LLD round to design Chess.
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Q1. Hiring manager round. Grilling on resume and past experience questions
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Q1. Tell me about yourself and about previous organisation.
Ans. 
I am a software developer with 5 years of experience. I previously worked at XYZ Company as a full-stack developer.
• 5 years of experience in software development

• Previous role as a full-stack developer at XYZ Company

• Proficient in programming languages such as Java, Python, and JavaScript
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Q2. Basic technical questions about the framework and the specific language.
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Q1. More technical questions
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SQL and coding questions

Q1. Salary negotiation
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Q1. What is dependency injection and inversion principle
Ans. 
Dependency injection is a design pattern that allows objects to receive dependencies rather than creating them internally.
• Dependency injection is a way to achieve loose coupling between objects.

• It allows for easier testing and maintenance of code.

• Inversion principle states that high-level modules should not depend on low-level modules, but both should depend on abstractions.

• This principle helps to achieve a more flexib...read more
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Q2. Program to find missing number in array
Ans. 
Program to find missing number in array
• Iterate through the array and calculate the sum of all elements

• Calculate the sum of all numbers from 1 to n (where n is the length of the array)

• Subtract the sum of array elements from the sum of all numbers to get the missing number
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