What is the minimum amount of data that a disk can read or write in HDFS? What is the use of data cleaning?
Understand the Problem
The questions are assessing knowledge related to Hadoop Distributed File System (HDFS) and data cleaning practices. The first question asks about the minimum data read/write unit in HDFS, while the second question focuses on the purpose of data cleaning.
Answer
Block size; All of the above
The final answer for question 5 is 'Block size', and for question 6 is 'All of the above'.
Answer for screen readers
The final answer for question 5 is 'Block size', and for question 6 is 'All of the above'.
More Information
The block size in HDFS is typically large, e.g., 128 MB, allowing efficient data storage and processing. Data cleaning involves removing errors and inconsistencies to improve data quality.
Tips
For question 5, ensure understanding that 'block size' is specific to HDFS. For question 6, remember that data cleaning encompasses multiple tasks like removing noise and correcting data.
Sources
- Top 50 Big Data MCQs - InterviewBit - interviewbit.com
- Introduction to Hadoop Distributed File System HDFS | CodeX - medium.com
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