1. If the current average row length is 93 bytes, and on average, each row will expand by 9 bytes, the appropriate PCTFREE value is?

2. If the current average row length is 234 bytes, and on average, each row will expand by 40 bytes, the appropriate PCTFREE value is?

3. If the current average row length is 56 bytes, and rows are guaranteed not to expand at all, then the appropriate PCTFREE value is?

4. Suppose a table contains the following columns, and none of the columns is nullable (none of the rows in any columns can have a NULL value). What is the appropriate value for PCTFREE for this table?

PAYMENT_DETAIL_AMOUNT NUMBER(7,2) PAYMENT_NUMBER NUMBER(38,0) PLEDGE_ID NUMBER(38,0)

5. Suppose a block is filled with 50 rows, with a PCTFREE value of 0. If a NULL value in one of the rows is updated with a value 20 bytes long, then how will Oracle accommodate the update?

A: Through row chaining

B: Through a change in the PCTFREE value

C: Through row migration

D: By increasing the size of the next extent