Hadoop MapReduce Quiz – Showcase Your Skills

Which of the following is true about MapReduce?

What happens if a number of reducers are set to 0?

Which of the following maps input key/value pairs to a set of intermediate key/value pairs.

The number of maps is usually driven by the total size of

Which of the following is the default Partitioner for partitioning keyspace.

Which among the following is the programming model designed for processing large volumes of data in parallel by dividing the work into a set of independent tasks.

Which of the following is the default InputFormat, which treats each value of input a new value and the associated key is byte offset.

Which among the following controls the partitioning of the keys of the intermediate map-outputs.

Which of the following phases occur simultaneously

Which statements is true about a key, value pairs?

In HDFS put command is used to

Which among the following is the default OutputFormat?

Which of the following is not an input format in Hadoop?

What is the correct sequence of data flow in MapReduce?
a. InputFormat

b. Mapper

c. Combiner

d. Reducer

e. Partitioner

f. OutputFormat

Which of the following is not the phase of Reducer?

Mappers sorted output is Input to the

How to disable the reduce step

Keys from the output of shuffle and sort implement which of the following interface?

Put the following phases of a MapReduce program in the order that they execute?
a. Partitioner

b. Mapper

c. Combiner

d. Shuffle/Sort

Which among the following generate an intermediate key-value pair