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Oracle Database Administration I Sample Questions (Q143-Q148):

NEW QUESTION # 143
Examine this SQL statement:
SELECT cust_id, cust_last_name "Last Name"
FROM customers
WHERE country_id = 10
UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30
Identify three ORDER BY clauses, any one of which can complete the query successfully.
(Choose three.)

A. ORDER BY 2, 1
B. ORDER BY CUST_NO
C. ORDER BY 2, cust_id
D. ORDER BY "Last Name"
E. ORDER BY "CUST_NO"

Answer: A,C,D

NEW QUESTION # 144
Which two statements are true regarding Oracle database space management within blocks managed by Automatic Segment Space Management (ASSM)? (Choose two.)

A. PCTFREE defaults to 10% for all blocks in all segments for all compression methods
B. Update operations always attempt to find blocks with free space appropriate to the length of the row being updated
C. Insert operations always attempt to find blocks with free space appropriate to the length of the row being inserted
D. A block will always be eligible for inserts if the row is short enough to fit into the block
E. ASSM assigns blocks to one of four fullness categories based on what percentage of the block is allocated for rows

Answer: B,D

NEW QUESTION # 145
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 1 returns only one row of output.
B. Statement 2 returns only one row of output.
C. Both the statements give the same output.
D. Both statements will return NULL if either UNIT_PRICE or QUANTITY contains NULL.
E. Statement 2 may return multiple rows of output.

Answer: A,E

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 # 146
Examine the description of the BOOKS table:

The table has 100 rows.
Examine this sequence of statements issued in a new session:
INSERT INTO books VALUES ('ADV112', 'Adventures of Tom Sawyer', NULL,
NULL);
SAVEPOINT a;
DELETE FROM books;
ROLLBACK TO SAVEPOINT a;
ROLLBACK;
Which two statements are true? (Choose two.)

A. The first ROLLBACK command restores the 101 rows that were deleted and commits the inserted row
B. The second ROLLBACK command undoes the insert
C. The second ROLLBACK command does nothing
D. The first ROLLBACK command restores the 101 rows that were deleted, leaving the inserted row still to be committed
E. The second ROLLBACK command replays the delete

Answer: A,B

NEW QUESTION # 147
Which two functions are performed by a listener?

A. returning the results of processing from the server process to the user process
B. connecting a user process to a server process
C. verifying the service name in an incoming user request
D. creating a user session in the System Global Area (SGA)
E. verifying a user's authentication credentials
F. maintaining the connection to a client's user process until the user request is completed

Answer: A,B

NEW QUESTION # 148
......

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