Practice Crunch Interview Multiple Choice Questions with Answers Quiz-1

Q.1.

PCollection, PTable, and PGroupedTable all support a __________ operation.

a) intersection
b) union
c) OR
d) None of the mentioned

Explanation

Q.2.

Point out the correct statement.

a) StreamPipeline executes the pipeline in-memory on the client
b) MemPipeline executes the pipeline by converting it to a series of Spark pipelines
c) MapReduce framework approach makes it easy for the framework to serialize data from the client to the cluster
d) All of the mentioned

Explanation

Q.3.

Crunch uses Java serialization to serialize the contents of all of the ______ in a pipeline definition.

a) Transient
b) DoFns
c) Configuration
d) All of the mentioned

Explanation

Q.4.

Inline DoFn that splits a line up into words is an inner class ____________

a) Pipeline
b) MyPipeline
c) ReadPipeline
d) WritePipe

Explanation

Q.5.

Point out the wrong statement.

a) DoFns also have a number of helper methods for working with Hadoop Counters, all named increment
b) The Crunch APIs contain a number of useful subclasses of DoFn that handle common data processing scenarios and are easier to write and test
c) FilterFn class defines a single abstract method
d) None of the mentioned

Explanation

Q.6.

DoFns provide direct access to the __________ object that is used within a given Map or Reduce task via the getContext method.

a) TaskInputContext
b) TaskInputOutputContext
c) TaskOutputContext
d) All of the mentioned

Explanation

Q.7.

The top-level ___________ package contains three of the most important specializations in Crunch.

a) org.apache.scrunch
b) org.apache.crunch
c) org.apache.kcrunch
d) all of the mentioned

Explanation

Q.8.

The Avros class also has a _____ method for creating PTypes for POJOs using Avro’s reflection-based serialization mechanism.

a) spot
b) reflects
c) gets
d) all of the mentioned

Explanation

Q.9.

The ______________ class defines a configuration parameter named LINES_PER_MAP that controls how the input file is split.

a) NLineInputFormat
b) InputLineFormat
c) LineInputFormat
d) None of the mentioned

Explanation

Q.10.

The ________ class allows developers to exercise precise control over how data is partitioned, sorted, and grouped by the underlying execution engine.

a) Grouping
b) GroupingOptions
c) RowGrouping
d) None of the mentioned

Explanation

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