Explanation:Hadoop has support for cross platform operating system. 8. Hadoop achieves reliability by replicating the data across multiple hosts, and hence does not require ________ storage on hosts.
A. RAID
B. Standard RAID levels
C. ZFS
D. Operating system
Answer:A
Explanation:Hadoop has support for cross platform operating system. 8. Hadoop achieves reliability by replicating the data across multiple hosts, and hence does not require ________ storage on hosts.
A. RAID B. Standard RAID levels C. ZFS D. Operating system
Explanation:With the default replication value, 3, data is stored on three nodes: two on the same rack, and one on a different rack. 9. Above the file systems comes the ________ engine, which consists of one Job Tracker, to which client applications submit MapReduce jobs.