NoSQL DATA-SCIENCE-OPTIMIZE Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A data team uses a Hadoop cluster with Hive for batch processing and wants to add a NoSQL database for real-time serving. They have a budget constraint and cannot afford to maintain two separate systems. They are considering using HBase for both batch and real-time. What is the most significant performance trade-off they will face?

   • AHBase cannot handle real-time writes and batch reads simultaneously
   • BHBase does not support SQL, so the team cannot use Hive for batch processing
   • CHBase is not horizontally scalable, limiting its ability to handle large datasets
   • DHBase's random access is fast, but full-table scans for batch analytics are slower than HDFS-based processing
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   Which pattern describes using Hadoop for batch processing while using a NoSQL database for real-time serving of the processed results?

   • AData lake pattern
   • BLambda architecture
   • CExtract, transform, load (ETL)
   • DStar schema
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4. 8foundation · easy

   Which statement best describes a key characteristic of NoSQL databases compared to traditional relational databases?

   • AThey require a fixed schema defined before any data is inserted.
   • BThey are designed to scale horizontally across many distributed nodes.
   • CThey use SQL as the primary query language for all data access.
   • DThey enforce strict ACID transactions across all records by default.
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Which use case is most suitable for a NoSQL database?

   • AStoring highly structured financial transactions with strict multi-row integrity.
   • BGenerating complex ad-hoc reports that join many normalized tables.
   • CManaging rapidly evolving product catalogs with varying attributes across items.
   • DMaintaining a single source of truth for employee records with rigid referential integrity.
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6. 10application · medium

   A social media company uses a NoSQL database to store user posts. When a user posts a message, it is immediately written to the primary region, and the write is asynchronously replicated to secondary regions. A user in a secondary region might not see their own post for a few seconds. Which consistency model best describes this behavior?

   • ACausal consistency
   • BEventual consistency
   • CRead-your-writes consistency
   • DStrong consistency
   Reveal Solution Discussion Select an answer first