Question 38: As you know, in Cassandra tables, must have primary keys. For primary key, you can use either TimeUUID or UUID only?
Which of the following you can say is a Timeuuid?
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Correct Answer: 2
Explanation: To differentiate between Time UUID, you need to check third set of data and its first value. If first value start with 1 than its time UUID and if starts with 4 than its UUID only.
The uuid() function takes no parameters and generates a random Type 4 UUID suitable for use in INSERT or UPDATE statements.
UUID and TIMEUUID are stored the same way in Cassandra, and they only really represent two different sorting implementations.
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