A data scientist reports that their experimental datasets stored in the sandbox zone of a Hadoop data lake are missing after a scheduled maintenance. What is the most probable cause?

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Hadoop - Modern Data Architecture with Hadoop

ASandbox data was deleted as part of routine cleanup since it is temporary

BCurated zone policies automatically moved sandbox data to processed zone

CRaw data ingestion failed causing sandbox data loss

DData was overwritten by automated backup restoration

Step-by-Step Solution

Solution:

Step 1: Understand sandbox purpose
Sandbox is for temporary, experimental data and often cleaned up regularly.
Step 2: Analyze maintenance impact
Routine maintenance may include deleting sandbox data to free space.
Step 3: Exclude other options
Curated policies do not move sandbox data; ingestion failure affects raw zone; backup restoration does not overwrite sandbox.
Final Answer:
Sandbox data was deleted as part of routine cleanup since it is temporary -> Option A
Quick Check:
Sandbox = temporary, often cleaned [OK]

Quick Trick: Sandbox data is temporary and often deleted [OK]

Common Mistakes:

Assuming sandbox data is permanent
Confusing sandbox with curated or raw zones
Blaming ingestion or backup for sandbox loss

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A data scientist reports that their experimental datasets stored in the sandbox zone of a Hadoop data lake are missing after a scheduled maintenance. What is the most probable cause?

Step 1: Understand sandbox purpose

Step 2: Analyze maintenance impact

Step 3: Exclude other options

Final Answer:

Quick Check:

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