Tag: Big Data Analytics

Point out the correct statement.

administrator
Point out the correct statement.
Hive Commands are non-SQL statement such as setting a property or adding a resource
Excellent ! Your Answer is Correct. Explanation: Commands can be used in HiveQL scripts or directly in the CLI or Beeline.
Set -v prints a list of configuration variables that are overridden by the user or Hive
Set sets a list of variables that are overridden by the user or Hive
None of the Option is Correct

Point out the wrong statement.

administrator
Point out the wrong statement.
HDFS is designed to support small files only
Excellent ! Your Answer is Correct. Explanation: HDFS is designed to support very large files.
Any update to either the FsImage or EditLog causes each of the FsImages and EditLogs to get updated synchronously
NameNode can be configured to support maintaining multiple copies of the FsImage and EditLog
None of the Option is Correct

__________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer.

administrator
__________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer.
OutputCollector
Excellent ! Your Answer is Correct. Explanation: Hadoop MapReduce comes bundled with a library of generally useful mappers, reducers, and partitioners.
Partitioner
Reporter
All Options are Correct

Mapper and Reducer implementations can use the ________ to report progress or just indicate that they are alive.

administrator
Mapper and Reducer implementations can use the ________ to report progress or just indicate that they are alive.
Reporter
Excellent ! Your Answer is Correct. Explanation: Reporter is a facility for MapReduce applications to report progress, set application-level status messages and update Counters.
Partitioner
OutputCollector
All Options are Correct

Point out the wrong statement.

administrator
Point out the wrong statement.
Reducer has 2 primary phases
Excellent ! Your Answer is Correct.
Increasing the number of reduces increases the framework overhead, but increases load balancing and lowers the cost of failures
It is legal to set the number of reduce-tasks to zero if no reduction is desired
The framework groups Reducer inputs by keys (since different mappers may have output the same key) in the sort stage
Page 6 of 14
1 … 4 5 6 7 8 … 14