Explanation:
The ORDER BY clause does sort data in ascending order by default. And the ORDER BY clause comes last in the SELECT statement: after FROM or WHERE or GROUP BY clause.
Incorrect Answers:
2: The ORDER BY clause does sort data in ascending, not descending order, by default.
3: The ORDER BY clause must be after the WHERE clause in the SQL statement.
4: The ORDER BY clause is executed on the server side as the whole SQL statement is.
6: The ORDER BY clause is executed last in the query execution, after results are limited with the WHERE and GROUP BY clause conditions.
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 56-61
Chapter 2: Limiting, Sorting, and Manipulating Return Data

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