What is a block in HDFS? what is the default size in Hadoop 1 and Hadoop 2? Can we change the block size?1
State some key Points about Apache Avro?
What is memtable?
Can NameNode and DataNode be a commodity hardware?
How to drop database in apache tajo?
Define Spark Streaming.
What does secondary name-node means?
How to use 'foreach' operation in pig scripts?
Can you join multiple fields in Apache
Explain sum(), max(), min() operation in Apache Spark?
Define role of velocity in big data?
What is the difference between apache mahout and apache spark’s mllib?
What is Bucketing and Clustering in Hive?
What are the essential hooping tools that improve performance? Big data?
What are the debugging tools used for Apache Pig scripts?
Define the roles of the file system in any framework?