CCD-410 Mapreduce Practice Questions

2. When configuring a MapReduce job, what is the role of the Mapper?

• AA. Filter data
• BB. Sort output data
• CC. Aggregate data
• DD. Split input data

4. What happens to a failed task in a MapReduce job?

• AA. It is ignored
• BB. It causes data loss
• CC. It is retried
• DD. It fails the job

6. During which phase does data shuffling occur in a MapReduce job?

• AA. Input phase
• BB. Shuffle phase
• CC. Reduce phase
• DD. Map phase

8. What is the primary purpose of the reducer in a MapReduce job?

• AA. To map data to key-value pairs
• BB. Store final output
• CC. Process key-value data
• DD. Collect intermediate data