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1.

Write the Port Numbers for NameNode, Task Tracker and Job Tracker.

Answer» WRITE the Port Numbers for NameNode, TASK Tracker and Job Tracker.
Below are the VALUE of Port NUMBER for NameNode, TaskTracker and JobTracker
(1)NameNode 50070(Port Number)
(2)TaskTracker 50060(Port Number)
(3)JobTracker 50030(Port Number)
Discussion
2.

Most asked Interview Question is define the role of JobTracker in BigData?

Answer»

Most asked Interview Question is define the role of JobTracker in BigData?
One of the most COMMON question called in every BigData interview is what is role of JobTracker. One of the primary function of JobTracker is resource management which means its manage the TaskTrackers. Other jobs of JobTracker are TRACKS resource AVAILABILITY and also handles task life cycle management. And will check the process of task and fault tolerance of tasks.
Some of most important features of JobTracker are:-
(1)TaskTracker will finds the best JobTracker nodes to execute the specific tasks on particular nodes.
(2)JobTracker will also communicates with the NameNode to identify the data location.
(3)JobTracker will also tracks the execution of MAPREDUCE workloads.
(4)It is a process that runs on separate node which is not on DataNode
(5)It allocates TaskTracker nodes based on the available slots.
(6)It monitors each TaskTracker and submits the overall job report to the client.
Discussion