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Welcome to Oracle 1z0-148 practice test online
QUESTION 1
Examine the following SQL statement:
ALTER SESSION SET PLSQL_OPTIMIZE_LEVEL=3;
What is the result of executing this statements?
A. The PL/SQL optimize level for some existing PL/SQL units will be changed as an immediate result.
B. The PL/SQL optimize level for subsequently complied PL/SQL units will be set to 3 and inlining will be enabled.
C. The PL/SQL optimize level for subsequently compiled PL/SQL units will be set to 3 and inlining will be disabled.
D. This statement will fail because PLSQL_OPTIMIZE_LEVEL can only be set at the system level,
Correct Answer: C
QUESTION 2
Which two statements are true about conversion from DBMS_SQL to native dynamic SQL? (Choose two.)
A. The DBMS_SQL.TO_REFCURSOR function should be used when the number of bind variables is known at compile
time, but not the number of items to be selected.
B. The DBMS_SQL.TO_REFCURSOR function converts a SQL cursor number to a weakly typed cursor variable only
after it has been opened, parsed, and executed via DBMS_SQL.
C. DBMS_SQL operations can access the cursor only as the SQL cursor number, not as a REF CURSOR variable.
D. The DBMS_SQL.TO_REFCURSOR function allows a query result to be returned implicitly from a non PL/SQL
environment to a stored PL/SQL program.
E. The DBMS_SQL.IS_OPEN function is used to verify that a SQL cursor number is open after it has been converted to
a REF CURSOR.
Correct Answer: AC
Reference: https://books.google.com.pk/books?id=iWhbFeboD84Candpg=PA556andlpg=PA556anddq=The+DBMS_SQ
L.TO_REFCURSOR+function+should+be+used+when+the+number+of+bind+variables+is+known+at+compile+time,+b
ut+not +the+number+of+items+to+be+selectedandsource=blandots=yAxmV8X7IEandsig=ACfU3U3_BJFUSzRWrtszG1
LG7-YVTt9j4wandhl=enandsa=Xandved=2ahUKEwiY7ueY-6boAhXBe30KHcBBCDcQ6AEwAHoECBQQAQ#v=onepag
eandq=The% 20DBMS_SQL.TO_REFCURSOR%20function%20should%20be%20used%20when%20the%20number
%20of%20bind%20variables%20is%20known%20at%20compile%20time%2C%20but%20not%20the%20number%20of
%20items%20to %20be%20selectedandf=false
https://docs.oracle.com/cd/E11882_01/appdev.112/e25519/dynamic.htm
QUESTION 3
Which three statements are correct with reference to intra unit inlining?
A. Inlining will always decrease the size of a unit.
B. Setting PLSQL_OPTIMIZE_LEVEL to 2 means automatic inlining is attempted.
C. You cannot inline an external subroutine.
D. Programs that make use of smaller helper subroutines are good candidates for inlining.
E. Pragmas apply only to calls in the next statement following the pragma.
F. You cannot inline local subroutines.
Correct Answer: CDE
Reference: http://dbmanagement.info/Books/MIX/Les07_PLSQL.pdf
QUESTION 4
The database instance was started up with the following initialization parameter values:
MEMORY_TARGET = 500M
RESULT_CACHE_MODE = FORCE
RESULT_CACHE_MAX_SIZE = 0
After the database startup, to enable the result cache, you issued the following command:
SQL> ALTER SYSTEM SET result_cache_max_size = 2M SCOPE = MEMORY;
Which is the effect of this command?
A. The query result cache is enabled and 2 MB of the memory target is allocated to the result cache.
B. The query result cache is enabled and 0.25% of the memory target is allocated to the result cache.
C. The command produces an error because the database instance is started up with the
RESULT_CACHE_MAX_SIZE parameter set to 0.
D. The query result cache is not enabled because the database instance is started up with the
RESULT_CACHE_MAX_SIZE parameter set to 0.
Correct Answer: D
QUESTION 5
You want to display the contents of CREATE_LIST.
Which two lines need to be corrected in the PL/SQL block?
A. Line 2
B. Line 3
C. Line 5
D. Line 6
E. Line 7
Correct Answer: AE
QUESTION 6
In a user session, tracing is enabled as follows:
SQL> EXECUTE
DBMS_TRACE.SET_PLSQL_TRACE(DBMS_TRACE.TRACE_ENABLED_LINES);
PL/SQL procedure successfully completed.
You executed the procedure as follows:
SQL> EXECUTE PROC10
PL/SQL procedure successfully completed.
When you examine the PLSQL_TRACE_EVENTS table, you find that no trace information was written into it.
View the Exhibit.
What is the reason for this?
A. The PROC10 procedure is created with the invoker\\’s right.
B. The PROC10 procedure is not compiled with the DEBUG option.
C. Tracing is not enabled with the TRACE_ENABLED_CALLS option.
D. The TRACE_ENABLED parameter is set to FALSE for the session.
Correct Answer: B
QUESTION 7
Which two statements are true about SecureFile LOB options? (Choose two.)
A. The DECRYPT option can be used to remove the encryption only if the LOB column is empty.
B. The KEEP_DUPLICATES option removes the deduplication effect only on new data in a LOB column.
C. The KEEP_DUPLICATES option removes the deduplication effect on existing and new data in a LOB column.
D. The DECRYPT option can be used to remove the encryption from LOB columns that are empty or contain data.
Correct Answer: CD
QUESTION 8
Examine the section of code taken from a PL/SQL program:
PROCEDURE p1 (x PLS_INTEGER) IS
… …
PRAGMA INLINE (p1, \\’NO\\’);
x:= p1(1) + p1(2) + 17; — Call 1
…
x:= p1(3) + p1(4) + 17; — Call 2
Call 1 and Call 2 are the comments for distinguishing the code. The PLSQL_OPTIMIZE_LEVEL parameter is set to 3.
Which two statements are true in this scenario? (Choose two.)
A. The calls to the P1 procedure are not inlined in the section commented as Call 1.
B. The calls to the P1 procedure might be inlined in the section commented as Call 2.
C. The calls to the P1 procedure are inlined in both the sections commented as Call 1 and Call 2.
D. The calls to the P1 procedure are never inlined in both the sections commented as Call 1 and Call 2.
Correct Answer: AB
QUESTION 9
View the Exhibit to examine the PL/SQL code for the GET_METADATA function. Which statement is true about the
metadata gathered by the function?
A. The end result is the creation of DDL for the TIMECARDS table with all instances of the HR schema changed to
SCOTT.
B. The end result is the creation of an XML document for all tables with all physical, storage, logging, and other segment
attributes.
C. The end result is the creation of DDL for all tables with all instances of the HR schema changed to SCOTT along with
all physical, storage, logging, and other segment attributes.
D. The end result is the creation of DDL for all tables and associated indexes with all instances of the HR schema
changed to SCOTT along with all physical, storage, logging, and other segment attributes.
Correct Answer: A
QUESTION 10
Which two types of metadata can be retrieved by using the various procedures in the DBMS_METADATA PL/SQL
package? (Choose two.)
A. report of invalidated objects in a schema
B. report of statistics of an object in the database
C. DDL for all object grants on a table in the database
D. data definition language (DDL) for all objects in a schema
Correct Answer: CD
QUESTION 11
Examine these statements:
1.
A function with invoker\\’s rights can be result cached by using both AUTHID CURRENT_USER and RESULT_CACHE
in its declaration.
2.
A function with invoker\\’s rights cannot be result cached because it may allow a user to retrieve data cached by
another user.
3.
Results in the result cache for an invoker\\’s rights function will be cached by the value of CURRENT_SCHEMA in the
invoking environment.
4.
By default, declaring a function with RESULT_CACHE makes it an invoker\\’s rights result cached function.
5.
A function with invoker\\’s rights can be result cached because the function result cache is created per user for
invoker\\’s rights functions.
Identify the set of correct statements with respect to invoker\\’s rights and function result caching.
A. 1, 3, 4 and 5
B. 1 and 3
C. 1, 3 and 5
D. 2 only
E. 1, 3 and 4
Correct Answer: D
QUESTION 12
Examine this declaration section: Which two executable sections will display the message `Summary is null\\’?
A. BEGIN 1_rec := NULL; 1_emp := emp_typ (1_rec); IF 1_emp (1).expr_summary IS EMPTY THEN
DBMS_OUTPUT.PUT_LINE (‘Summary is null’); END IF; END;
B. BEGIN 1_rec.emp_id :=1; 1_rec.expr_summary := NULL; 1_emp :=emp_typ (1_rec); IF 1_emp(1).expr_summary IS
NULL THEN DBMS_OUTPUT.PUT_LINE (‘Summary is null’); END IF; END;
C. BEGIN 1_rec.emp_id :=1; 1_rec.expr_summary := EMPTY_CLOB (); 1_emp := emp_typ (1_rec); IF
1_emp(1).expr_summary IS NULL THEN DBMS_OUTPUT.PUT_LINE (‘Summary is null’); END IF; END;
D. BEGIN 1_emp := emp_typ (); IF NOT 1_emp. EXISTS (1) THEN DBMS_OUTPUT.PUT_LINE (‘Summary is null’);
END IF; END;
E. BEGIN 1_emp. EXTEND; IF NOT 1_emp. EXISTS (1) THEN DBMS_OUTPUT.PUT_LINE (‘Summary is null’); END
IF; END;
Correct Answer: DE
QUESTION 13
Which two types of query results cannot be stored in the query result cache? (Choose two.)
A. subquery results
B. results of a query having the SYSDATE function
C. results of a query having the GROUP BY clause
D. results of a query having the DATE data type in the WHERE clause
Correct Answer: AB
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