1.1. Which of the following programs is responsible for HDFS data storage?
a)NameNode b)Jobtracker c)Datanode d)secondaryNameNode e)tasktracker
Answer C datanode
1.2. How many copies of blocks in HDfS are saved by default?
a) 3 copies b) 2 copies c) 1 copy d) Unsure answer A 3 copies by default
1.3. Which of the following programs is usually started on the same node as the NameNode?
a) SecondaryNameNode b) DataNode c) TaskTracker d) Jobtracker
Answer D
1.4.HDFS default block size
a)32MB b)64MB c)128MB
Answer: B