Your test database is running in NOARCHIVELOG mode. Which statement is true regarding the type ofbackups that can be performed on the database（） You can perform online whole database backups.。 You can performofflinewhole database backups.。 You cannot perform schema-level export/import operations.。 You can perform the backup of only the SYSTEM tablespace when the database is open.。
地网接地体埋设在农田等经常开挖施工的地面下时，应深埋（）m以下，并在适当位置作明显的标识。 1。 2。 3。 4。
What is true regarding subqueries?（） The inner query always sorts the results of the outer query.。 The outer query always sorts the results of the inner query.。 The outer query must return a value to the inner query.。 The inner query returns a value to the outer query.。 The inner query must always return a value or the outer query will give an error.。
混合摩擦
Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（） Line 16。 Line 17。 Line 18。 Line 19。 The object is NOT a candidate for garbage collection.。
Given：
Which two statements are true？（）
