CCA Spark and Hadoop Developer Exam
CDP Generalist Exam
What does CDH packaging do on install to facilitate Kerberos security setup?
Automatically configures permissions for log files at & MAPRED_LOG_DIR/userlogs
Creates users for hdfs and mapreduce to facilitate role assignment
Creates directories for temp, hdfs, and mapreduce with the correct permissions
Creates a set of pre-configured Kerberos keytab files and their permissions
Creates and configures your kdc with default cluster values
For each YARN job, the Hadoop framework generates task log file. Where are Hadoop task log files stored?
Cached by the NodeManager managing the job containers, then written to a log directory on the NameNode
Cached in the YARN container running the task, then copied into HDFS on job completion
In HDFS, in the directory of the user who generates the job
On the local disk of the slave mode running the task
Which command does Hadoop offer to discover missing or corrupt HDFS data?
Hdfs fs –du
Hdfs fsck
Dskchk
The map-only checksum
Hadoop does not provide any tools to discover missing or corrupt data; there is not need because three replicas are kept for each data block