Data Processing With Pig — Part 2 MCQs with Explanations

ILLUSTRATE is the correct answer to “. . . . . . . . operator is used to view the step-by-step execution of a series of statements.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

Pig Statistics is the correct answer to “. . . . . . . . is a framework for collecting and storing script-level statistics for Pig Latin.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

PigRunner is the correct answer to “The . . . . . . . . class mimics the behavior of the Main class but gives users a statistics object back.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

PigXUnit is the correct answer to “. . . . . . . . is a simple xUnit framework that enables you to easily test your Pig scripts.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

$pig_trunk ant pigunit-jar is the correct answer to “Which of the following will compile the Pigunit”. This question is standard in competitive examination syllabi for Data Processing With Pig.

local is the correct answer to “PigUnit runs in Pig's . . . . . . . . mode by default.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

LoadFunc is the correct answer to “. . . . . . . . abstract class has three main methods for loading data and for most use cases it would suffice to extend it.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

LoadMetadata is the correct answer to “Which of the following has methods to deal with metadata”. This question is standard in competitive examination syllabi for Data Processing With Pig.

setUdfContextSignature() is the correct answer to “. . . . . . . . method will be called by Pig both in the front end and back end to pass a unique signature to the Loader.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

getShipFiles() is the correct answer to “. . . . . . . . return a list of hdfs files to ship to distributed cache.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

setLocation() is the correct answer to “The loader should use . . . . . . . . method to communicate the load information to the underlying InputFormat.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

prepareToRead() is the correct answer to “. . . . . . . . method enables the RecordReader associated with the InputFormat provided by the LoadFunc is passed to the LoadFunc.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

pushProjection() is the correct answer to “. . . . . . . . method tells LoadFunc which fields are required in the Pig script.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

LoadCaster is the correct answer to “A loader implementation should implement . . . . . . . . if casts (implicit or explicit) from DataByteArray fields to other types need to be supported.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

\d alias is the correct answer to “Which of the following is shortcut for DUMP operator”. This question is standard in competitive examination syllabi for Data Processing With Pig.

set is the correct answer to “Which of the following command is used to show values to keys used in Pig”. This question is standard in competitive examination syllabi for Data Processing With Pig.

run is the correct answer to “Use the . . . . . . . . command to run a Pig script that can interact with the Grunt shell (interactive mode).”. This question is standard in competitive examination syllabi for Data Processing With Pig.

exec is the correct answer to “Which of the following command can be used for debugging”. This question is standard in competitive examination syllabi for Data Processing With Pig.

tutorial.jar is the correct answer to “Which of the following file contains user defined functions (UDFs)”. This question is standard in competitive examination syllabi for Data Processing With Pig.

pig {-param param_name = param_value | -param_file file_name} [-debug | -dryrun] script is the correct answer to “Which of the following is correct syntax for parameter substitution using cmd”. This question is standard in competitive examination syllabi for Data Processing With Pig.

All of the mentioned is the correct answer to “You can specify parameter names and parameter values in one of the ways”. This question is standard in competitive examination syllabi for Data Processing With Pig.

Both parameter files and command line parameters is the correct answer to “. . . . . . . . are scanned in the order they are specified on the command line.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

a = load '/mapred/history/done' using HadoopJobHistoryLoader() as (j:map[], m:map[], r:map[]); b = group a by (j#'PIG_SCRIPT_ID', j#'USER', j#'JOBNAME'); c = foreach b generate group.$1, group.$2, COUNT(a); d = filter c by $2 > 3; dump d is the correct answer to “Which of the following scripts that generate more than three MapReduce jobs”. This question is standard in competitive examination syllabi for Data Processing With Pig.

a = load '/mapred/history/done' using HadoopJobHistoryLoader() as (j:map[], m:map[], r:map[]); b = foreach a generate j#'PIG_SCRIPT_ID' as id, j#'USER' as user, j#'JOBNAME' as script_name, (Long) j#'SUBMIT_TIME' as start, (Long) j#'FINISH_TIME' as end; c = group b by (id, user, script_name) d = foreach c generate group.user, group.script_name, (MAX(b.end) - MIN(b.start)/1000; dump d is the correct answer to “Which of the following find the running time of each script (in seconds)”. This question is standard in competitive examination syllabi for Data Processing With Pig.

a = load '/mapred/history/done' using HadoopJobHistoryLoader() as (j:map[], m:map[], r:map[]); b = foreach a generate j#'PIG_SCRIPT_ID' as id, j#'USER' as user, j#'QUEUE_NAME' as queue; c = group b by (id, user, queue) parallel 10; d = foreach c generate group.user, group.queue, COUNT(b); dump d is the correct answer to “Which of the following script determines the number of scripts run by user and queue on a cluster”. This question is standard in competitive examination syllabi for Data Processing With Pig.

a = load '/mapred/history/done' using HadoopJobHistoryLoader() as (j:map[], m:map[], r:map[]); b = foreach a generate (Chararray) j#'STATUS' as status, j#'PIG_SCRIPT_ID' as id, j#'USER' as user, j#'JOBNAME' as script_name, j#'JOBID' as job; c = filter b by status != 'SUCCESS'; dump c is the correct answer to “Which of the following script is used to check scripts that have failed jobs”. This question is standard in competitive examination syllabi for Data Processing With Pig.

a = load '/mapred/history/done' using HadoopJobHistoryLoader() as (j:map[], m:map[], r:map[]); b = foreach a generate j#'PIG_SCRIPT_ID' as id, j#'USER' as user, j#'JOBNAME' as script_name, (Long) r#'NUMBER_REDUCES' as reduces; c = group b by (id, user, script_name) parallel 10; d = foreach c generate group.user, group.script_name, MAX(b.reduces) as max_reduces; e = filter d by max_reduces == 1; dump e is the correct answer to “Which of the following code is used to find scripts that use only the default parallelism”. This question is standard in competitive examination syllabi for Data Processing With Pig.

procedural is the correct answer to “Pig Latin is . . . . . . . . and fits very naturally in the pipeline paradigm while SQL is instead declarative.”. This question is standard in competitive examination syllabi for Data Processing With Pig.

All of the mentioned is the correct answer to “In comparison to SQL, Pig uses . . . . . . . .”. This question is standard in competitive examination syllabi for Data Processing With Pig.

pig.input.dirs is the correct answer to “Which of the following is an entry in jobconf”. This question is standard in competitive examination syllabi for Data Processing With Pig.