Which is true about counter variables in a FOR loop?
Options:
It must explicitly be declared.
It can be modified in the body of the loop.
It cannot be NULL.
It is accessible outside the body of the loop.
Answer:
Which two are true about INDEX-BY tables? (Choose two.)
The index can be integer or string.
The index can be integer only.
INDEX-BY table types can be created in PL/SQL blocks only.
INDEX-BY table types can be created both with the CREATE TYPE statement and in PL/SQL blocks.
INDEX-BY table types can be created with the CREATE TYPE statement.
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