MapReduce Framework Quiz

What is the main purpose of the MapReduce framework?

• To sort data alphabetically

• To distribute and parallelize data processing across large clusters of machines

• To compress files for storage

• To handle network communication between servers

Which of the following is the correct sequence of phases in a MapReduce job?

• Reduce → Map → Shuffle

• Map → Shuffle → Reduce

• Shuffle → Map → Reduce

• Map → Reduce → Shuffle

What is the role of the Mapper in MapReduce?

• To combine the output data

• To divide the input data into key-value pairs

• To sort the final output

• To reduce the data to a smaller size

In a MapReduce job, what does the Reducer do?

• It increases the number of key-value pairs

• It filters the data

• It aggregates and processes the output from the Mapper

• It splits the input data into chunks

What is a key-value pair in the context of MapReduce?

• A combination of a key and a function

• A data structure where each key is associated with a value

• A pair of input and output files

• A combination of two values

What happens during the Shuffle and Sort phase in MapReduce?

• Data is copied to a different cluster

• The intermediate data is grouped by key and sorted

• The output is compressed

• Data is split into smaller chunks

How does the MapReduce framework handle fault tolerance?

• By automatically restarting failed tasks

• By storing data on RAID disks

• By creating backups of all tasks

• By using a single server to manage all tasks

In which environment is MapReduce most commonly used?

• Desktop computing

• Mobile applications

• Large-scale data processing in distributed systems

• Real-time video streaming

What is the purpose of the combiner function in MapReduce?

• To compress the output of the Reducer

• To merge the results of multiple Reducers

• To perform a local reduce operation on the Mapper's output

• To split the input data into smaller parts

Which of the following is an example of a problem that can be solved using MapReduce?

• Calculating the sum of an array on a single machine

• Sorting a list of names on a single computer

• Counting the frequency of words in a large dataset distributed across multiple machines

• Rendering graphics for a video game