Recall & Review
beginner
What does the LOAD operation do in Hadoop?
LOAD reads data from a file or source into Hadoop's processing environment so you can work with it.
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beginner
Explain the FILTER operation in Hadoop.
FILTER selects only the data rows that meet a condition, like picking only apples from a basket of fruits.
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beginner
What is the purpose of the STORE operation in Hadoop?
STORE saves the processed data back to a file or storage location so you can use it later or share it.
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beginner
How would you describe the sequence of LOAD, FILTER, and STORE in a Hadoop job?
First, LOAD brings data in. Then FILTER picks the data you want. Finally, STORE saves the results.
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beginner
Give a simple example of a FILTER condition in Hadoop.
For example, FILTER data where age > 30 means only keep rows where the age is more than 30.
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What does the LOAD operation do in Hadoop?
✗ Incorrect
LOAD reads data from a source into Hadoop so it can be processed.
Which operation selects data rows that meet a condition?
✗ Incorrect
FILTER picks only the rows that satisfy a condition.
What is the final step to save processed data in Hadoop?
✗ Incorrect
STORE saves the processed data to storage.
If you want to keep only data where sales > 100, which operation do you use?
✗ Incorrect
FILTER applies conditions like sales > 100 to select data.
What is the correct order of operations to process data in Hadoop?
✗ Incorrect
First LOAD data, then FILTER it, then STORE the results.
Describe the roles of LOAD, FILTER, and STORE operations in a Hadoop data processing task.
Think about bringing data in, picking what you want, and saving it.
You got /3 concepts.
Explain why filtering data before storing it is useful in Hadoop workflows.
Consider what happens if you save everything versus only what you need.
You got /3 concepts.