Amazon Hadoop Interview Questions
- What are the differences between Hadoop and Spark?
- What are the daemons required to run a Hadoop cluster?
- How will you restart a NameNode?
- Explain about the different schedulers available in Hadoop.
- List few Hadoop shell commands that are used to perform a copy operation.
- What is jps command used for?
- What are the important hardware considerations when deploying Hadoop in production environment?
- How many NameNodes can you run on a single Hadoop cluster?
- What happens when the NameNode on the Hadoop cluster goes down?
- What is the conf/hadoop-env.sh file and which variable in the file should be set for Hadoop to work?
- Apart from using the jps command is there any other way that you can check whether the NameNode is working or not.
- Which command is used to verify if the HDFS is corrupt or not?
- List some use cases of the Hadoop Ecosystem
- Which is the best operating system to run Hadoop?
- What are the network requirements to run Hadoop?
- What is the best practice to deploy a secondary NameNode?
- How often should the NameNode be reformatted?
- How can you add and remove nodes from the Hadoop cluster?
- Explain about the different configuration files and where are they located.
- What is the role of the namenode?