Hadoop Cluster Interview Questions and Answers
Are you looking for Hadoop Cluster Interview Questions that employers frequently ask? The second set of Hadoop Cluster Interview Questions covers the setup of a Hadoop Cluster. I’m sure you didn’t miss the first instalment of our Hadoop Interview Questions series, which covered the top 50 Hadoop interview questions.
Top Hadoop Cluster Interview Questions:
- Which modes of operation is Hadoop capable of?
- What are the Standalone (local) mode’s characteristics?
- What are the Pseudo mode’s characteristics?
- What are the advantages and disadvantages of Fully Distributed mode?
- What is the contents of /etc/hosts and what role does it play in configuring a Hadoop cluster?
- Which ports are used by the NameNode, ResourceManager, and MapReduce JobHistory servers by default?
- What are the primary configuration files for Hadoop?
- How does Hadoop CLASSPATH impact the startup and shutdown of Hadoop daemons?
- What does a spill factor mean in terms of RAM?
- What is the command for extracting a compressed tar.gz file?
- How are you going to verify that Java and Hadoop are installed on your system?
- Which replication factor is the default, and how are you going to change it?
- What is the abbreviation for fsck?
- Which hdfs-site.xml properties are the most important?
- What happens if you run hadoop fsck / and receive a ‘connection refused java exception’?
- How do we use the HDFS command to view compressed files?
- What is the command for entering and exiting safe mode?
- What is the purpose of the ‘jps’ command?
- How do I relaunch Namenode?
- How can we determine whether or not NameNode is operational?
- How can we view the Namenode in the web browser’s user interface?
- Which commands are used to start and stop Hadoop daemons?