CCA-500 Question #68: Real Exam Question with Answer & Explanation

The correct answer is D. Tasktracker. A TaskTracker is a slave node daemon in the cluster that accepts tasks (Map, Reduce and Shuffle operations) from a JobTracker. There is only One Task Tracker process run on any hadoop slave node. Task Tracker runs on its own JVM process. Every TaskTracker is configured with a set

Question

Which daemons instantiates JVM's to perform mapreduce processing in a cluster running mapreduce v1 (MRv1)?

Options

ANodemanager
Bapplicationmanager
CApplicationmaster
DTasktracker
EJobtracker
FDatanode
GNamenode
HResourcemanager

Explanation

A TaskTracker is a slave node daemon in the cluster that accepts tasks (Map, Reduce and Shuffle operations) from a JobTracker. There is only One Task Tracker process run on any hadoop slave node. Task Tracker runs on its own JVM process. Every TaskTracker is configured with a set of slots, these indicate the number of tasks that it can accept. The TaskTracker starts a separate JVM processes to do the actual work (called as Task Instance) this is to ensure that process failure does not take down the task tracker.

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