Define and Describe the Characteristics of Big Data DATA-SCIENCE-FOUNDATIONS Practice Questions (Page 4)

Questions 16–18

1. 16foundation · easy

   Which statement best defines Big Data in the context of data science?

   • AData that is generated exclusively by social media platforms and IoT devices.
   • BData that is always unstructured and cannot be stored in a relational database.
   • CData that is too large, fast, or varied to be processed effectively by traditional methods, requiring new approaches to capture, manage, and analyze it.
   • DAny dataset that exceeds one terabyte in size and requires a distributed storage system.
   Reveal Solution Discussion Select an answer first
2. 17expert · hard

   A telecommunications company has collected petabytes of call detail records (CDRs) over the past decade. The data contains many incomplete and inconsistent entries. The company has spent significant resources cleaning and storing this data. Now, the analytics team has built a churn prediction model that identifies at-risk customers with 85% accuracy, enabling the company to launch targeted retention campaigns. The company's leadership is questioning whether the investment in this Big Data initiative was worthwhile. Which characteristic of Big Data should the leadership focus on to justify the investment?

   • AValue, because the model delivers a measurable business benefit
   • BVelocity, because the CDRs are generated at high speed
   • CVeracity, because the data quality issues were addressed
   • DVolume, because the petabytes of data justify the storage investment
   Reveal Solution Discussion Select an answer first
3. 18expert · hard

   A media streaming company is designing its data architecture. The company needs to store years of viewing history (hundreds of petabytes) for offline analysis, while also processing real-time clickstream data to power its recommendation engine. The company has a limited budget and must choose between investing in a massive distributed storage system or a high-throughput stream processing platform. The company's leadership decides to prioritize the stream processing platform. Which characteristic of Big Data is the leadership implicitly deprioritizing in this decision?

   • AVeracity, because the data quality is uncertain
   • BVariety, because the viewing history and clickstream data are different types
   • CVelocity, because the real-time clickstream processing is being prioritized
   • DVolume, because the storage of hundreds of petabytes is being deprioritized
   Reveal Solution Discussion Select an answer first