Category: Big Data Technology

Point out the wrong statement.

administrator
Point out the wrong statement.
DataNode is aware of the files to which the blocks stored on it belong to
Excellent ! Your Answer is Correct. Explanation: NameNode is aware of the files to which the blocks stored on it belong to.
User data is stored on the local file system of DataNodes
Block Report from each DataNode contains a list of all the blocks that are stored on that DataNode
Replication Factor can be configured at a cluster level (Default is set to 3) and also at a file level

Point out the correct statement.

administrator
Point out the correct statement.
DataNode is the slave/worker node and holds the user data in the form of Data Blocks
Excellent ! Your Answer is Correct. Explanation: There can be any number of DataNodes in a Hadoop Cluster.
Each incoming file is broken into 32 MB by default
Data blocks are replicated across different nodes in the cluster to ensure a low degree of fault tolerance
None of the Option is Correct

Point out the wrong statement.

administrator
Point out the wrong statement.
The Programming model, MapReduce, used by Hadoop is difficult to write and test
Excellent ! Your Answer is Correct.
Hardtop processing capabilities are huge and its real advantage lies in the ability to process terabytes & petabytes of data
Hadoop uses a programming model called “MapReduce”, all the prorams should confirm to this model in order to work on Hadoop platform
None of the Option is Correct

As Companies move past the experimental phase with Hadoop, many cite the need for additional capabilities, including ______

administrator
As Companies move past the experimental phase with Hadoop, many cite the need for additional capabilities, including ______
Improved security, workload management, and SQL support
Excellent ! Your Answer is Correct.
Improved data storage and information retrieval
Improved extract, transform and load features for data integration
Improved data warehousing functionality
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