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Oracle Database Administration I Sample Questions (Q81-Q86):

NEW QUESTION # 81
In the ORCL database, UNDOTBS1 is the active undo tablespace with these properties:
1. A size of 100 MB
2. AUTOEXTEND is off
3. UNDO_RETENTION is set to 15 minutes
4. It has RETENTION GUARANTEE
UNDOTBS1 fills with uncommitted undo 10 minutes after the database opens.
What will happen when the next update is attempted by any transaction?

A. It succeeds and the generated undo is stored in SYSAUX.
B. It fails and returns the error message "ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1' ".
C. It succeeds and the generated undo is stored in SYSTEM.
D. It succeeds and the least recently written undo block of UNDOTBS1 is overwritten by the generated undo.
E. It succeeds and the least recently read undo block of UNDOTBS1 is overwritten by the generated undo.

Answer: D

NEW QUESTION # 82
Examine the description of the CUSTOMERS table:

For customers whose income level has a value, you want to display the first name and due amount as 5% of their credit limit. Customers whose due amount is null should not be displayed.
Which query should be used?

A. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNTFROM customersWHERE cust_income_level != NULLAND due_amount !=NULL;
B. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNTFROM customersWHERE cust_income_level IS NOT NULLAND cust_credit_limit IS NOT NULL;
C. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNTFROM customersWHERE cust_income_level != NULLAND cust_credit_level !=NULL;
D. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNTFROM customersWHERE cust_incoms_level IS NOT NULLAND due_amount IS NOT NULL;
E. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNTFROM customersWHERE cust_income_level <> NULLAND due_amount <> NULL;

Answer: B

NEW QUESTION # 83
Which two statements are true about trace files produced by the Oracle Database server?
(Choose two.)

A. Trace file names are based on the database name concatenated with a sequential number
B. All trace files contain error information that require contacting Oracle Support
C. Trace files are written to the Fast Recovery Area (FRA)
D. They can be written by server processes
E. They can be written by background processes

Answer: D,E

Explanation:
https://gerardnico.com/db/oracle/trace_file

NEW QUESTION # 84
Which three statements are true about data block storage in an Oracle Database?

A. An index block can contain row data.
B. A block header contains a row directory pointing to all rows in the block.
C. A table block must always contain row data.
D. Row data is stored starting at the end of the block.
E. A data block header is of a fixed length.

Answer: B,E

NEW QUESTION # 85
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. Both statements will return NULL if either UNIT_PRICE or QUANTITY contains NULL.
C. Statement 2 may return multiple rows of output.
D. Statement 2 returns only one row of output.
E. Both the statements give the same output.

Answer: A,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 # 86
......

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