Launch / Terminate Linux services using AWS Run Command

Introduction In this post, we will learn controlling system services using AWS Run Command. We will see how to control Apache service with an example. The same process can be applied to other services like Mysql, Tomcat, etc. In small IT firms, there are limited team members who know about the…

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Invoking lambda function using SNS Trigger

Introduction In this post, we are going to learn invoking lambda function using SNS Trigger. We will use SNS topic to display how lambda function captures SNS notifications. Prerequisites SNS topic Lambda function Create SNS Topic Go to SNS management console. Create a new topic with name LambdaSNSTopic. For more information see…

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Learn AWS Lambda in 5 minutes with Java example

Introduction This post is useful for those who are new to AWS lambda and want a quick configuration and testing. In this post, we will cover both approaches (implement RequestHandler.handleRequest, custom handler) to create a lambda function. Follow this link to know about approaches we cover: Lambda Function Handler. Please visit AWS…

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Safely Manage AWS Security in Apache Spark

In this post, we will learn how to safely manage AWS security in Apache Spark. Apache Spark provides various filesystem clients (s3, s3n, s3a) for reading and writing to and from Amazon S3. Because s3 block filesystem is deprecated and s3n native is not maintained, I am going to use…

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Java interview questions for 0 to 2 years experience

1. Introduction This post covers possible java interview questions with answers. Java and J2EE questions are uniquely designed to help experienced developers. You will find the answer to every question just after it. Enjoy learning! 2. Core Java Interview Questions Question: After invoking the wait method on an object, obj1,…

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