Celestial Systems Senior Software Engineer Interview Questions and Answers

Q1. How to identify if a queue is circular
Ans. 
A circular queue can be identified by checking if the rear pointer is one position behind the front pointer.
• Check if rear pointer is one position behind front pointer

• Check if front pointer is at index 0 and rear pointer is at index n-1 in an array of size n

• Check if front pointer is at index rear+1 modulo n in an array of size n
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Q1. Design notification system
Ans. 
Design a notification system for a software application.
• Identify the types of notifications needed (e.g. email, SMS, in-app)

• Consider the frequency and urgency of notifications

• Implement a notification queue to handle multiple notifications

• Include user preferences for notification settings

• Utilize push notifications for real-time updates
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Write multiple polyfills for array

Hacker rank test. Basic coding questions on arrays, list etc.

Q1. Interactive session. Theoritical questions on oops, multithreading, springboot, java8 and few coding questions.
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Q1. Design round. Questions on system design and best practices to be followed while developing any service. Few managerial questions as well.
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Q1. Profile related questions and salary discussion.
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Q1. About company values
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Q1. UML class diagram
Ans. 
UML class diagram is a visual representation of classes, attributes, methods, and relationships in a system.
• Classes are represented as boxes with three compartments for class name, attributes, and methods.

• Attributes are listed in the second compartment with their data types.

• Methods are listed in the third compartment with their parameters and return types.

• Relationships between classes are shown using lines with arrows ...read more
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Competency based questions

Q1. 1. Pattern print code. 2. Types of S3 bucket in AWS. 3. Java basic question. 4. Spring/ Spring boot basic question. 5. Hibernate basic interview question. 6. Some behavioral question.
Ans. 
This is a list of questions asked in an interview for Senior Software Engineer position.
• 1. Pattern print code: Write a code to print a specific pattern using loops.

• 2. Types of S3 bucket in AWS: Explain the different types of S3 buckets in Amazon Web Services.

• 3. Java basic question: Provide a basic question related to Java programming language.

• 4. Spring/Spring Boot basic question: Give an example of a basic question rel...read more
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Q1. Can you describe a situation in which you were unable to convince your senior?
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Q2. What is your approach to managing a subordinate who is not performing?
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Q1. Basics .net , c#, sql
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Q1. Current Project Details, Roles and some technical questions too
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Q1. Package Discussion and Other basic details
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Good technical round, you can manage, mainly Java questions used to come

Q1. HR round is also good package discussion will happen
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Q2. Company personal so kept secret
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Q1. General question about the project, challenges, etc
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Q1. Implement tail -f command w/o use of external libraries
Ans. 
Implementing tail -f command without external libraries in Python
• Open the file in read mode

• Use a loop to continuously read new lines added to the file

• Print the new lines as they are read
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Q1. General questions on challenges, current role, production issues
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Q2. DSA Question - next warm day
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