Ellicium Solutions Senior Software Engineer Interview Questions and Answers

Q1. Dsa concepts including trees
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Q2. Balanced tree implementation
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A balanced tree maintains its height for efficient operations like insertion, deletion, and lookup.
• Balanced trees include AVL trees and Red-Black trees.

• AVL trees maintain balance by ensuring the heights of two child subtrees differ by at most one.

• Red-Black trees use color properties to ensure the longest path from root to leaf is no more than twice the length of the shortest.

• Example: Inserting nodes in an AVL tree requ...read more
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Q3. Pre order traversal intree
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Pre-order traversal visits nodes in a tree in the order: root, left subtree, right subtree.
• Start at the root node and process it first.

• Recursively visit the left subtree before the right subtree.

• Example: For a tree with root 1, left child 2, and right child 3, pre-order traversal yields [1, 2, 3].

• Useful for creating a copy of the tree or getting prefix expressions in expression trees.
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Q1. Questions on Core and advance Java like Collections, Java8, streams, Multithreading, Spring Boot concepts like annotations, security, codes and Microservices, Agile.
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Q1. Technical + Managerial Round Technical questions on Java Spring Boot and Microservices. Managerial round questions as well.
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Q1. Tell me about yourself.
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Q2. Why are you looking for a change?
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Q3. What are your salary expectations?
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Q4. Share details of your previous job.
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Q5. This was also the salary discuss round.
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How would you approach performance issues in an application module

Q1. How would you process millions of records in an excel file
Ans. 
Use programming language to read and process data from Excel file efficiently.
• Use a programming language like Python, Java, or C# to read the Excel file.

• Utilize libraries like pandas in Python or Apache POI in Java for efficient data processing.

• Implement batch processing or parallel processing to handle millions of records efficiently.

• Optimize code for memory management and performance to avoid crashes or slowdowns.

• Con...read more
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Q1. Linked list questions, array and string questions
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Q2. Rest api, microservices design patterns, design principles , System design, java detailed
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Q1. About mobile testing and logs
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Some questions that range from easy to medium level.

Q1. General questions around your resume, the tech stacks you worked on, fundamentals and deepdive into that.
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Q2. High level system design
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High level system design involves creating an overall architecture for a software system.
• Identify the main components of the system

• Define the interactions between components

• Consider scalability, reliability, and performance

• Use diagrams like UML to visualize the design
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Q1. Can you describe your experience, the projects you have worked on, challenges you solved and other stuffs around that.
Ans. 
I have extensive experience working on various software projects, overcoming challenges and delivering successful solutions.
• Developed a web application for a healthcare company to streamline patient data management

• Implemented a real-time messaging feature in a social media platform to improve user engagement

• Optimized database queries to improve performance of an e-commerce website

• Collaborated with cross-functional team...read more
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Q1. Salary discussion
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Asked 2 coding questions on arrays

Q1. Java related questions were asked
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Q2. Mongo related we're asked
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