SSDB Tech Services Senior Developer Interview Questions and Answers

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Q1. How to create NPM SDK?
Ans. 
To create an NPM SDK, you need to structure your code as a package, publish it to NPM registry, and document its usage.
• Structure your code as a package with a package.json file specifying dependencies, entry point, and scripts.

• Publish your package to the NPM registry using 'npm publish' command after logging in with 'npm login'.

• Document the usage of your SDK with README.md file, examples, and API documentation.
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Q2. Write a Serverless function to expose a CRUD operation API using dynamo DB?
Ans. 
Create a Serverless function to expose CRUD operations using DynamoDB
• Use AWS Lambda to create the Serverless function

• Use API Gateway to expose the API endpoints

• Use AWS SDK to interact with DynamoDB for CRUD operations

• Implement GET, POST, PUT, DELETE methods for CRUD operations
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Q3. Explain the clean architecture principles used in your project?
Ans. 
Clean architecture principles focus on separation of concerns, independence of frameworks, testability, and maintainability.
• Separation of concerns: Dividing the application into layers (e.g. presentation, domain, data) to ensure each layer has a specific responsibility.

• Independence of frameworks: Decoupling the application from external frameworks to make it easier to switch or update frameworks in the future.

• Testabili...read more
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Q4. How do you bind gateway to serverless function?
Ans. 
To bind a gateway to a serverless function, you can use API Gateway services provided by cloud providers like AWS, Azure, or Google Cloud.
• Create a new API Gateway in your cloud provider's console.

• Define the API endpoints and methods that will trigger your serverless function.

• Connect the API Gateway to your serverless function by specifying the function's ARN or endpoint.

• Set up any necessary permissions or security conf...read more
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Q5. What libraries do you used for Unit Testing?
Ans. 
I primarily use JUnit and Mockito for unit testing in Java projects.
• JUnit is a popular Java testing framework for writing and running unit tests

• Mockito is a mocking framework that allows for creating mock objects in unit tests
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