Developing Mapreduce Applications — Part 2 MCQs with Explanations

Configuration is the correct answer to “. . . . . . . . class adds HBase configuration files to its object.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

hbase-site.xml is the correct answer to “. . . . . . . . is the main configuration file of HBase.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

Hadoop is the correct answer to “HBase uses the . . . . . . . . File System to store its data.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

deleteColumn() is the correct answer to “You can delete a column family from a table using the method . . . . . . . . of HBAseAdmin class.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

mapred.job.reduce.input.buffer.percen is the correct answer to “. . . . . . . . is percentage of memory relative to the maximum heap size in which map outputs may be retained during the reduce.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

${HADOOP_LOG_DIR}/userlogs is the correct answer to “The standard output (stdout) and error (stderr) streams of the task are read by the TaskTracker and logged to . . . . . . . .”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

HashPartitioner is the correct answer to “Which of the following is the default Partitioner for Mapreduce”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

Result is the correct answer to “The . . . . . . . . class provides the getValue() method to read the values from its instance.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

JobClient is the correct answer to “. . . . . . . . is the primary interface by which user-job interacts with the JobTracker.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

mapred is the correct answer to “Maximum virtual memory of the launched child-task is specified using . . . . . . . .”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

OutputLogFilter is the correct answer to “. . . . . . . . is used to filter log files from the output directory listing.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

JobTracker is the correct answer to “The . . . . . . . . executes the Mapper/ Reducer task as a child process in a separate jvm.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

Region Server is the correct answer to “. . . . . . . . communicate with the client and handle data-related operations.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.

mapred is the correct answer to “During the execution of a streaming job, the names of the . . . . . . . . parameters are transformed.”. This question is standard in competitive examination syllabi for Developing Mapreduce Applications.