List the various HDFS daemons in HDFS cluster?

What is the difference between NAS and HDFS?

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

What do you mean by metadata in HDFS? Where is it stored in Hadoop?

What is the optimal block size in HDFS?

What do you mean by metadata in HDFS?

Data node block size in HDFS, why 64MB?

What happens if the block in HDFS is corrupted?

What is Fault Tolerance in HDFS?

What is the procedure to create users in HDFS and how to allocate Quota to them?

How does a client read/write data in HDFS?

What is the difference between MapReduce engine and HDFS cluster?

Explain NameNode and DataNode in HDFS?

How data or file is read in HDFS?

How is indexing done in HDFS?