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Oracle 1Z0-146

Oracle Database 11g: Advanced PL/SQL

Questions and Answers : 146
Q&A Update On : November 17, 2017
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Oracle 1Z0-146

Oracle Database 11g: Advanced PL/SQL

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    Oracle 1Z0-146 (Oracle Database 11g: Advanced PL/SQL)

    Questions and Answers : 146
    Q&A Update On : November 17, 2017
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    Oracle 1Z0-146 (Oracle Database 11g: Advanced PL/SQL)

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    Q&A Update On : November 17, 2017
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1Z0-146 Questions and Answers

1Z0-146


  1. Adding the RESULT_CACHE hint to inline views enables optimizations between the outer query and the inline view, and the query result is cached.

  2. A query result for a query that has a bind variable is stored in the cache and is reused if the query is equivalent even when the bind variable has a different value.


Answer: A, B


QUESTION: 124

Which two statements are true about the extproc process? (Choose two.)


  1. It loads the dynamic library.

  2. It is started by the server process.

  3. It converts the C output back to PL/SQL.

  4. A single extproc process serves all user sessions.


Answer: A, C


QUESTION: 125

The PLSQL_OPTIMIZE_LEVEL parameter is set to 2 for the session. Examine the section of code given:

FUNCTION p2 (p boolean) return PLS_INTEGER IS ... FUNCTION p2 (x PLS_INTEGER) return PLS_INTEGER IS

... ...

PRAGMA INLINE(p2, 'YES');

x := p2(true) + p2(3);

...

Which statement is true about the INLINE pragma procedure calls?


  1. Only the call to the P2 function with BOOLEAN as the argument is inlined.

  2. INLINE pragma affects both the functions named P2 and is called inline.

  3. Only the call to the P2 function with PLS_INTEGER as the argument is inlined.

  4. None of the functions are inlined because inlining is not supported for overloaded functions.


Answer: B


QUESTION: 126

When do you use static SQL as a technique for avoiding SQL injection?


  1. when the WHERE clause values are unknown

  2. when the code contains data definition language (DDL) statements

  3. when all Oracle identifiers are known at the time of code compilation

  4. when the SET clause values are unknown at the time of code compilation


Answer: C


QUESTION: 127

Examine the structure of the TEXT_TAB table. Name Null? Type

--------------- -------- ---------- TEXT_ID NUMBER DOC1 CLOB DOC2 CLOB

You issue the following INSERT commands:

INSERT INTO text_tab VALUES (1, 'This is line 1',null);

INSERT INTO text_tab VALUES (2, 'This is line 1','This is line 2'); Then you execute the following block of the PL/SQL code: DECLARE

vc1 VARCHAR2(1000):= 'This is the preface'; lb1 CLOB; lb2 CLOB; BEGIN

SELECT doc1 INTO lb1 FROM text_tab WHERE text_id=1; SELECT doc1 || doc2 INTO lb1 FROM text_tab WHERE text_id=2; lb2 := vc1|| lb1;

UPDATE text_tab SET doc2 = lb2 WHERE text_id = 1; END;

/

What is the outcome?


  1. It executes successfully.

  2. It gives an error because VARCHAR2 should be explicitly converted to CLOB.

  3. It gives an error because CLOB variables should be initialized to EMPTY_CLOB().

  4. It gives an error because the concatenation operator cannot be used with the CLOB data type.


Answer: A


QUESTION: 128

In which two situations is the body of a result-cached function executed? (Choose two.)


  1. if the memory allocated for the result cache is increased

  2. if a session on this database instance invokes the function with the same parameter values

  3. if the first time a session on this database instance invokes the function with a parameter value

  4. if a session executes a data manipulation language (DML) statement on a table or view that was specified in the RELIES_ON clause of a result-cached function


Answer: C, D


QUESTION: 129

The result cache is enabled for the database instance. Examine the following code for a PL/SQL function:

CREATE OR REPLACE FUNCTION get_hire_date (emp_id NUMBER) RETURN VARCHAR RESULT_CACHE RELIES_ON (HR.EMPLOYEES)

IS

date_hired DATE; BEGIN

SELECT hire_date INTO date_hired FROM HR.EMPLOYEES

WHERE EMPLOYEE_ID = emp_id; RETURN TO_CHAR(date_hired); END; Which statement is true in this scenario?


  1. If sessions have different NLS_DATE_FORMAT settings, cached results have different formats.

  2. The function results are not cached because the query used in the function returns the DATE data type.

  3. If sessions have different NLS_DATE_FORMAT settings, cached results have same formats because the function's return type is VARCHAR.

  4. If a function is executed with same argument value but different NLS_DATE_FORMAT for the session, the cached result is overwritten with the new function result.


Answer: A


QUESTION: 130

Which two statements are true about associative arrays and nested tables? (Choose two.)


  1. Only associative arrays can hold an arbitrary number of elements.

  2. Only nested tables can be used as column types in database tables.

  3. Both associative arrays and nested tables can hold an arbitrary number of elements.

  4. Both associative arrays and nested tables can be used as column types in database tables.


Answer: B, C


QUESTION: 131

Which two statements are true about the OPEN and FILEOPEN routines in the DBMS_LOB package? (Choose two.)


  1. OPEN can be used to open only internal LOBs in the indicated mode.

  2. FILEOPEN can be used to open only external LOBs in the indicated mode.

  3. OPEN can be used to open internal and external LOBs in the indicated mode.

  4. FILEOPEN can be used to open internal and external LOBs in the indicated mode.


Answer: B, C


QUESTION: 132

When do you use static SQL as a technique for avoiding SQL injection?


  1. when the WHERE clause values are unknown

  2. when the code contains data definition language (DDL) statements

  3. when all Oracle identifiers are known at the time of code compilation

  4. when the SET clause values are unknown at the time of code compilation


Answer: C


QUESTION: 133

Which three statements are true about hierarchical profiling? (Choose three.)


  1. It provides function-level summaries.

  2. It produces an aggregated report of the SQL and PL/SQL execution times.

  3. It is useful for understanding the structure and control flow of complex programs.

  4. It can be used to identify hotspots and tuning opportunities in PL/SQL applications.

  5. It generates trace information for PL/SQL programs in the PLSQL_TRACE_EVENTS table.


Answer: A, C, D


QUESTION: 134

Which two statements are true about cursor variables? (Choose two.)


  1. Cursor variables can be parameterized like cursors.

  2. The query associated with a cursor variable cannot reference host variables and PL/SQL variables.

  3. The FETCH statement executes the query associated with a cursor variable and identifies the result set.


  4. Cursor attributes (%FOUND, %NOTFOUND, %ISOPEN, and %ROWCOUNT) can be applied to a cursor variable.

  5. The OPEN FOR statement executes the query associated with a cursor variable and identifies the result set.


Answer: D, E


QUESTION: 135

View the Exhibit and examine the code in the PL/SQL block.


The PL/SQL block generates an error on execution. What is the reason?


  1. The DELETE(n) method cannot be used with varrays.

  2. The DELETE(n) method cannot be used with nested tables.

  3. The NEXT method cannot be used with an associative array with VARCHAR2 key values.

  4. The NEXT method cannot be used with a nested table from which an element has been deleted.


Answer: A


QUESTION: 136

Which two statements are true about the migration of BasicFile to the SecureFile format by using the DBMS_REDEFINITION package? (Choose two.)


  1. It can be performed only on tables with a single LOB column.

  2. It automatically creates an interim table during the migration process.

  3. It allows the table that is migrated to be accessed throughout the migration process.

  4. It requires free space that is at least equal to the space used by the table that is migrated.

  5. It requires all constraints defined on the original table to be re-created manually after the migration.


Answer: C, D

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