Xyz Company Technical Architect Interview Questions and Answers

They will give one case study and you need to provide the comlete solution for that.

Q1. Mostly technical discussion
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Q1. What is difference between Association, Association, Aggregation ?
Ans. 
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
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Q2. Write Java program to invoke a AWS lambda function ?
Ans. 
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
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Q3. Write Java program for Singleton pattern ?
Ans. 
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
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Q4. How Security is maintained in Microservices ?
Ans. 
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
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Q5. What design patterns you have worked ?
Ans. 
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
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Q1. How much time you take to show the demo after getting the RFP ?
Ans. 
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
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Q2. What AWS services you have used ?
Ans. 
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
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Q3. Where AWS lambda you have used ?
Ans. 
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
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Q1. Mostly aligned with the skill set and expertise shown on my resume. The interviewers were very professional and we'll behaved. They started the discussion with introduction then fundamentals and in depth q...read more
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Q2. How you copied on Prem data to cloud? How you implemented model in your application? How you made your Hadoop clusters secure?
Ans. 
We used various tools and techniques to copy on-prem data to cloud, implemented the model in our application, and secured our Hadoop clusters.
• We used tools like AWS DataSync and Azure Data Factory to transfer data from on-premises to cloud

• For implementing the model, we used frameworks like TensorFlow and PyTorch

• To secure our Hadoop clusters, we implemented authentication and authorization mechanisms, enabled encryption...read more
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Q1. Cobol JCL db2 vsam
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Q1. SQL mainframe cobol vsam
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Q1. Salary negotiation and job role
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Q1. Scenario based questions
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Case studies and example

They will give one case study and you need to provide the comlete solution for that.

Q1. Mostly technical discussion
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Q1. Create MIcroservice using Saga patterns
Ans. 
Saga patterns are used to manage long-running transactions in a microservices architecture.
• Saga patterns help ensure consistency and reliability in distributed systems.

• They are used to coordinate multiple microservices to complete a complex transaction.

• Sagas use a series of local transactions and compensating actions to maintain data integrity.

• They provide fault tolerance and allow for easy rollback or compensation in ...read more
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