Which data format stores all of the data in a binary format making the files more compact, and will even add in
markers to help Map Reduce jobs determine where to break large files for more efficient processing?

A.
Parquet

B.
Avro

C.
ORC

D.
Sequence File

Explanation:
http://www.ibmbigdatahub.com/blog/how-succeed-using-avro-storage-format