which scenario results if you leave the dfs.hosts property in the NameNode’s configuration file empty (blank
Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the
dfs.hosts property in the NameNode’s configuration file empty (blank)?
Which command does Hadoop offer to discover missing or corrupt HDFS data?
Which command does Hadoop offer to discover missing or corrupt HDFS data?
On a cluster running MapReduce v1 (MRv1), the value of the mapred.tasktracker.map.tasks.maximum configuration
On a cluster running MapReduce v1 (MRv1), the value of the
mapred.tasktracker.map.tasks.maximum configuration parameter in the mapred-site.xml file
should be set to:
What results from this change?
You have a key-value pair size of l00 bytes. You increase your HFile block size from its default
64k. What results from this change?
which format will your data be returned from an HBase scan?
You have images stored in HBase, which you need to retrieve from within your application. In
which format will your data be returned from an HBase scan?
The shell command you should use to complete this is:
You have a “Users” table in HBase and you would like to insert a row that consists of a UserID,
“jsmith70” and an email address, “jane@example.com”. The table has a single Column Family
named “Meta” and the row key will be the user’s ID. The shell command you should use to
complete this is:
What metadata is stored on a DataNode when a block is written to it?
What metadata is stored on a DataNode when a block is written to it?
What does CDH packaging do on install to facilitate Kerberos security setup?
What does CDH packaging do on install to facilitate Kerberos security setup?
Which of the following should you do?
You have tin linage table live in production. The table users <timestamp> as the rowkey. You want
to change the existing rowkeys to <userid><timestamp>. Which of the following should you do?
Which of the following statements describes the result of RegionServer rs1 crashing?
Your client application calls the following method for all puts to the single table notifications:
‘put.setWriteToWAL, (false);
One region, region1, for the notifications table is assigned to RegionServer rs1. Which of the
following statements describes the result of RegionServer rs1 crashing?