Hadoop Interview Questions

Looking out for Hadoop Interview Questions that are frequently asked by employers? This is the best place to read Hadoop Interview Questions for Beginners and Experts.

1)Regions in Hadoop
2)Hbase
3)Why HBase ?
4)How can HBase Help?
5)Difference between Hive and Pig?
6)Hive Limitations.
7)About Hive.
8) What is Hive?
9)Math Function in Pig.
10)Which are the methods in the Mapper Interface?
11)How mapper is initiated in a running Job?
12)How does an Hadoop application look like or their basic com
13)How does master slave architecture in the Hadoop?
14)How many maximum JVM can run on a slave node?
15)What do you mean by TaskInstance?
16)What is Pig?
17)Serialization
18)Speculative execution to help with load- balancing.
19)Schedule mappers close to the data combiner:-
20)Combiner?
21)When the reducers are are started in a MapReduce job?
22)What is HDFS?
23)HDFS Block Size?
24)What is a Data Node?
25)How a Task Scheduled by a Job Tracker?
26)Explain the Core methods of the reducer?
27)Does the name node stay in safe mode?
28)Regions in Hadoop?
29)HBase ( HDFS + Random Read/Write)
30)Why HBase?