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Oracle Database Administration I Sample Questions (Q19-Q24):

NEW QUESTION # 19
A database is configured to use automatic undo management with temporary undo enabled.
An UPDATE is executed on a temporary table.
Where is the UNDO stored?

A. in the SYSAUX tablespace
B. in the undo tablespace
C. in the SGA
D. in the PGA
E. in the temporary tablespace

Answer: E

Explanation:
http://www.dba-oracle.com/t_temp_undo_enabled.htm

NEW QUESTION # 20
You execute this command:
CREATE SMALLFILE TABLESPACE sales
DATAFILE '/u01/app/oracle/sales01.dbf
SIZE 5G
SEGMENT SPACE MANAGEMENT AUTO;
Which two actions must you take to ensure UNDOTBS01 is used as the default UNDO tablespace? (Choose two.)

A. It must be smaller than the smallest BIGFILE tablespace
B. It is a locally managed tablespace
C. Any data files added to the tablespace must have a size of 5 gigabytes
D. Free space is managed using freelists
E. It uses the database default blocksize

Answer: B,E

Explanation:
Explanation/Reference:

NEW QUESTION # 21
Which two statements are true regarding the UNION and UNION ALL operators? (Choose two.)

A. The output is sorted by the UNION ALL operator
B. NULLS are not ignored during duplicate checking
C. Duplicates are eliminated automatically by the UNION ALL operator
D. The names of columns selected in each SELECT statement must be identical
E. The number of columns selected in each SELECT statement must be identical

Answer: B,E

NEW QUESTION # 22
Which two statements are true about the PMON background process? (Choose two.)

A. It records checkpoint information in the control file
B. It registers database services with all local and remote listeners known to the database instance
C. It kills sessions that exceed idle time
D. It frees unused temporary segments
E. It frees resources held by abnormally terminated processes

Answer: B,E

NEW QUESTION # 23
Table ORDER_ITEMS contains columns ORDER_ID, UNIT_PRICE and QUANTITY, of data type NUMBER.
Examine these SQL statements:
Statement 1:
SELECT MAX(unit_price * quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price * quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which two statements are true?

A. Statement 2 returns only one row of output.
B. Statement 1 returns only one row of output.
C. Statement 2 may return multiple rows of output.
D. Both statements will return NULL if either UNIT_PRICE or QUANTITY contains NULL.
E. Both the statements give the same output.

Answer: B,C

Explanation:
https://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqlj27781.html
The Expression can contain multiple column references or expressions, but it cannot contain another aggregate or subquery. It must evaluate to a built-in data type. You can therefore call methods that evaluate to built-in data types. (For example, a method that returns a java.lang.Integer or int evaluates to an INTEGER.) If an expression evaluates to NULL, the aggregate skips that value.

NEW QUESTION # 24
......

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