Hadoop its massive data processing capability helps built many real-time applications. Read more for details.
Hadoop MapReduce is totally different from other distributed systems. It handles server fails different way. Read more.
HDFS is Hadoop file system that acts as intermediate layer handles all data storage related things in Hadoop system. But creating Hadoop HDFS is expensive so an organisation has to go for alternative methods to store massive volume of data. Read more.
Hadoop itself follows FIFO process to schedule the tasks. The two popular tools Capacity and Fair an excellent way help to allocate resources and scheduling jobs.
The online Hadoop Quiz with questions really boost your knowledge quickly. The questions given in a way that a basic Hadoop knowledge holder can refresh it quickly.
Scala is high level language and in the processing of Big data with Hadoop eco system you can use Scala language. Read more.