Pig Interview Questions 2015

Pig Interview questions

1. How pig calculates the number of reducers for a job
2. How to change the default reducer calculation method in pig
3. What is hash based aggregation
4. Performance optimizations in pig
5. Types of joins in pig
6. Explain about merge-sparse join and when do we use it.
7. What are the conditions to use merge joins in Pig
8. How to implement customized loader
9. Can we store the data in partitioned manner? If yes, How?
10. How to load Hbase/Hive table in Pig
11. How to load partitioned hive table in pig
12. Which of the below efficient?

           i. A = load ' abc.txt' using PigStorage(",");
              B = Filter A by $0>10 and $1>15;
           
           ii. A = load ' abc.txt' using PigStorage(",");
               B = Filter A by $0>10;
               C = Filter B by $1>15;