Question 148 of 307
Single answerYou need to create a new transaction table in Cloud Spanner that stores product sales data. You are deciding what to use as a primary key. From a performance perspective, which strategy should you choose?
AThe current epoch time
BA concatenation of the product name and the current epoch time
✓CA random universally unique identifier number (version 4 UUID)
DThe original order identification number from the sales system, which is a monotonically increasing integer
✓
Correct Answer: C
A random universally unique identifier number (version 4 UUID)
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Explanation
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