Aurus IT Solutions Lead Solution Developer Interview Questions and Answers

Association represents a relationship between two classes, Aggregation is a type of association with a whole-part relationship.

• Association represents a relationship between two classes without implying any ownership.

• Aggregation is a type of association where one class is a part of another class.

• Composition is a stronger form of aggregation where the part cannot exist without the whole.

• In UML, association is represented...read more

To invoke an AWS Lambda function using Java program.

• Create an AWS Lambda client using AWS SDK for Java

• Invoke the Lambda function using invoke method

• Handle the response from the Lambda function

Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Create a private static instance of the class

• Provide a public static method to access the instance

• Ensure the constructor is private to prevent instantiation

Security in Microservices is maintained through authentication, authorization, encryption, and monitoring.

• Implementing authentication mechanisms like OAuth, JWT, or API keys to verify the identity of clients accessing the microservices.

• Utilizing authorization techniques such as role-based access control (RBAC) or attribute-based access control (ABAC) to control what actions users can perform.

• Encrypting data in transit ...read more

I have worked with design patterns such as Singleton, Factory, Observer, and Strategy.

• Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Factory pattern creates objects without specifying the exact class of object that will be created.

• Observer pattern defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified a...read more

The time taken to show the demo after receiving the RFP varies based on project complexity and client requirements.

• The time frame for demo preparation can range from a few days to a few weeks, depending on the scope of the project.

• It is important to thoroughly understand the RFP requirements before scheduling the demo to ensure all key points are addressed.

• Collaboration with the sales team and other stakeholders is cru...read more

I have used a variety of AWS services including EC2, S3, RDS, Lambda, and CloudFormation.

• EC2 - Elastic Compute Cloud for scalable virtual servers

• S3 - Simple Storage Service for object storage

• RDS - Relational Database Service for managed databases

• Lambda - Serverless computing service for running code without provisioning servers

• CloudFormation - Infrastructure as Code service for automating resource provisioning

I have used AWS Lambda for building serverless applications and automating tasks.

• Developed a serverless image processing application using AWS Lambda, S3, and API Gateway

• Implemented a cron job using AWS Lambda to automatically backup DynamoDB tables

• Integrated AWS Lambda with Amazon SNS to send notifications based on certain events