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51.

Administrators typically define parameters as final in __________ for values that user applications may not alter.(a) core-default.xml(b) core-site.xml(c) coredefault.xml(d) all of the mentionedThis question was posed to me during a job interview.The origin of the question is Hadoop Configuration in division Working of MapReduce of Hadoop

Answer»

Right ANSWER is (b) core-site.xml

For explanation I would SAY: Value strings are FIRST PROCESSED for variable expansion.
Discussion
52.

___________ gives site-specific configuration for a given hadoop installation.(a) core-default.xml(b) core-site.xml(c) coredefault.xml(d) all of the mentionedI had been asked this question in class test.Question is taken from Hadoop Configuration topic in portion Working of MapReduce of Hadoop

Answer» CORRECT choice is (b) core-site.xml

Easiest EXPLANATION: core-default.xml is read-only DEFAULTS for HADOOP.
Discussion
53.

Point out the correct statement.(a) Configuration parameters may be declared static(b) Unless explicitly turned off, Hadoop by default specifies two resources(c) Configuration class provides access to configuration parameters(d) None of the mentionedI got this question during an interview.This key question is from Hadoop Configuration topic in section Working of MapReduce of Hadoop

Answer»

Right option is (a) CONFIGURATION PARAMETERS may be declared static

Best EXPLANATION: Once a resource declares a value FINAL, no subsequently-loaded resource can ALTER that value.
Discussion
54.

Which of the following class provides access to configuration parameters?(a) Config(b) Configuration(c) OutputConfig(d) None of the mentionedI had been asked this question in class test.I would like to ask this question from Hadoop Configuration topic in section Working of MapReduce of Hadoop

Answer»

Correct answer is (B) Configuration

Best EXPLANATION: CONFIGURATIONS are SPECIFIED by RESOURCES.
Discussion