Big Data Interview Questions

1.      JPS Command used for?

2.      What all are the Nodes available in Hadoop System?

3.      What is NN, DN?

4.      What is Heart Beat in NN?

5.      Replication Factor? How much in default?

6.      About Config.file for hadoop?

7.      Meta data management?

8.      What is Block Report?

9.      What is fsImage?

10.   EDIT LOG?

11.   Checkpointing?

12.   Diff between Hadoop 1.x & 2.x ?

13.   Zoo Keeper

14.   Journal Node

15.   MAP REDUCE? Ex

16.   YARN?

17.   R.M and N.M

18.   GB, TB, PB,

19.   Stuctured, Semi Structured and unstructured

20.   Normalization?

21.   5V’s

22.   Who access hadoop cluster?

23.   Putty uses

24.   Gateway Node

25.   Spark submit

26.   Narrow and wide transformation

27.   MAP, Flat MAP, Filter, ReduceBy and GroupBy

28.   Threads? Uses

29.   How big size files processed in big data? Ex. 90Gb file

30.   Split Brain  Scenario

31.   Fencing Program

32.   Inuse.lock

33.   Memory tuning

34.   Jar files and uses, how to generate

35.   File Types? Avro, Parquet, difference

36.   Versions of Cloudera, Hadoop, Hive, Sqoop, Spark, Hbase

37.   Scala & functional programming