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Big Data – Q&A Session Quiz (263-3010-00L)

Time remaining: 0:01:19

Scoring: Mixed (SC, Subpoints, Open)

Question 1 — True / False (1 pt)

Indicate whether each statement is True or False.

1. Data independence refers to the decoupling of the logical view of data from its physical storage.
2. Big Data technologies primarily address the growing discrepancy between storage capacity, throughput, and latency.
3. Renaming columns in SQL does not have an equivalent relational algebra operator.
4. Big Data systems often discard normalization to improve scalability and performance.

Question 2 — SQL (1 pt)

Using the Discogs dataset:

Select the name of the artist who has released albums in the most different countries.

Exclude "Various Artists".

If there is a tie, choose the artist whose name comes first alphabetically.

Answer:

Technotronic

Question 3 — SQL (1 pt)