The output of the transformation RDD operation is considered as the input of Action operation. Actions are used to return the result for the specific action performed in Spark.
The key role of Action is to return the value to the driver program after running a computation on the dataset. The frequently used RDD transformations are as follows:Īn Action in Spark is the core operation of RDD. The transformation is a bit lazy because it only performs computation when the action requires the result to return to the driver program. The transformation operation key goal is to create a new dataset from the existing one. There are two main operations provided by RDD.
It can self download the dependencies from a central repository for building projects. The task prefix in the output is controlled by Ants logging mechanism, not by the java task itself so there is no way to change the java task usage to remove this output. It drives the processes or instructions described in build files as targets and extension points dependent upon each other. Write a two build.xml named with build1.xml and build2.xml.
It is primarily a project management tool. Apache Ant Interview questions: Apache Ant is a Java library and command-line tool for automating software build processes. Linux Write a ant build.xml which should create 5 files and five folders and change the file permission to all files to 644 and folder to 755. It is procedural in nature (manually tell exactly what to do and when to do it). It is declarative in nature (only source should be present in the default directory). It requires information on the project structure to be provided in the build.xml file. It does not require information about the project structure to be provided in the pom.xml file. It has built-in conventions to place source code, compiled code, etc. It is a Java library and command-line toolbox. It is a framework based on the concept of POM. It is most commonly used to build Java applications.
Here coding compiler sharing a list of 28 real-time interview questions on Jenkins.These Jenkins interview questions for devops will help you to crack your next Jenkins job interview.Happy reading and all the best for your future. If you are looking for Jenkins interview questions with answers, then you are at right place.