Deck 6: Functions

Question 1

The term "actual parameters" refers to the parameters that are listed in the program unit.

Answer 1

False

Question 2

You cannot include data type information when declaring a formal parameter. ________________________

Answer 2

False, size

Question 3

In a(n) function, the RETURN statement includes no arguments and is followed with a semicolon. _________________________

Answer 3

False, procedure

Question 4

The term "passed by reference" means that the value is copied from the actual parameter to the formal parameter.

Question 5

The RETURN statement can return constant values, such as a text string.

Question 6

A(n) procedure cannot be invoked in a standalone fashion. _________________________

Question 7

The term "formal parameters" refers to the arguments that are used when calling or invoking the program unit.

Question 8

A(n) procedure is part of an expression and cannot serve an entire statement. ____________________

Question 9

You can include multiple RETURN statements in the body of a function.

Question 10

The term "passed by value" means that a pointer to the value in the actual parameter is created instead of copying the value from the actual parameter to the formal parameter.

Question 11

The following is a correct example of the use of the DROP command.
DROP function_name;

Question 12

The term passed by value implies that a pointer to the value in the actual parameter is created instead of copying the value from the actual parameter to the formal parameter. _________________________

Question 13

A(n) procedure is one type of program unit that is used to accomplish one or more tasks, return none or many values, and is used only in PL/SQL statements. _________________________

Question 14

A function is quite similar to a procedure in that it is a program unit that achieves a task, can receive input values, and returns values to the calling environment.

Question 15

It is possible to reference a data dictionary to determine what code is contained in a program unit.

Question 16

The main difference between functions and procedures is that a function is part of an expression.

Question 17

Formal parameters including the RETURN data type cannot include size information.

Question 18

The term passed by reference implies that the value is copied from the actual parameter to the formal parameter. _________________________

Question 19

Procedures can be used in SQL statements.

Question 20

The RETURN statement in a function is used to control the flow of execution.

Question 21

Functions used in SQL statements must meet all of the following requirements, except ____.

A) Must be a stored database object
B) Can use only OUT parameters
C) Return data types must be a database data type
D) Cannot issue ALTER SESSION or ALTER SYSTEM commands

Question 22

A good method to handle the size issue when declaring variables that hold values from a database table is to use the ____ attribute to use the size of the database column.

A) NOCOPY
B) %TYPE
C) << >>
D) TYPE

Question 23

At least one ____ statement must be included in a function body to instruct which value to return.

A) CREATE
B) RETURN
C) BEGIN
D) EXCEPTION

Question 24

Functions cannot be used in a(n) CHECK constraint or as a default value of a table column. _________________________

Question 25

A(n) ____ is a request a programmer includes within his or her code that asks Oracle to modify the default processing in some manner.

A) compiler hint
B) pass by value
C) pass by reference
D) purity level

Question 26

Which of the following statements is True?

A) After IN OUT parameters are included in functions, the function can no longer be used in SQL statements.
B) After OUT parameters are included in functions, the function can no longer be used in SQL statements.
C) After INOUT parameters are included in functions, the function can no longer be used in SQL statements.
D) After IN parameters are included in functions, the function can no longer be used in SQL statements.

Question 27

How many input values does the following code require?
CREATE OR REPLACE FUNCTION memfmt1_sf
(p_id IN NUMBER,
P_first IN VARCHAR2,
P_last IN VARCHAR2)
RETURN VARCHAR2
IS
Lv_mem_txt VARCHAR2(35);
BEGIN
Lv_mem_txt := 'Member ' ||p_id|| ' - ' ||p_first|| ' ' ||p_last;
RETURN lv_mem_txt;
END;

A) 1
B) 2
C) 3
D) 4

Question 28

The default behaviors of value passing can be overridden by using a compiler hint named NOCOPY. _________________________

Question 29

Which of the following statements is incorrect?

A) A procedure can serve as an entire statement.
B) A function is part of an expression.
C) Procedures can be used in SQL statements.
D) A function cannot serve as an entire statement.

Question 30

All of the following represent restrictions on functions, except ____.

A) Functions cannot modify any tables in Oracle8 and prior versions.
B) Functions cannot be used in a CHECK constraint or as a default value of a table column.
C) If used in a local operation, no reading or writing of packaged variables is allowed.
D) If used in a SELECT, VALUES, or SET clause, the function can write values to packaged variables; otherwise, it is not allowed.

Question 31

____ refer to the parameters that are listed in the program unit.

A) Modes
B) Functions
C) Procedures
D) Formal parameters

Question 32

Which of the following code fragments would not raise an error?

A) CREATE OR REPLACE FUNCTION ship_calc(p_qty IN NUMBER)
IS
Lv_ship_num NUMBER(5,2);
BEGIN
IF p_qty > 10 THEN
Lv_ship_num := 11.00;
ELSE
Lv_ship_num := 5.00;
END IF;
RETURN lv_ship_num;
END;
B) CREATE OR REPLACE ship_calc(p_qty)
RETURN NUMBER
IS
Lv_ship_num NUMBER(5,2);
BEGIN
IF p_qty > 10 THEN
Lv_ship_num := 11.00;
ELSE
Lv_ship_num := 5.00;
ENDIF;
RETURN lv_ship_num;
END;
C) CREATE OR REPLACE FUNCTION ship_calc(p_qty IN NUMBER)
RETURN NUMBER
IS
Lv_ship_num NUMBER(5,2);
BEGIN
IF p_qty > 10 THEN
Lv_ship_num := 11.00;
ELSE
Lv_ship_num := 5.00;
END IF;
RETURN lv_ship_num;
END;
D) CREATE OR REPLACE FUNCTION ship_calc(p_qty IN NUMBER)
RETURN NUMBER
BEGIN
IF p_qty > 10 THEN
Lv_ship_num := 11.00;
ELSE
Lv_ship_num := 5.00;
END IF;
RETURN lv_ship_num;
END;

Question 33

The ____ purity level does not modify database tables.

A) WNDS
B) WNPS
C) RNPS
D) RNDS

Question 34

Which of the following correctly creates a function that performs an update on the BB_TEST1 table?

A) CREATE OR REPLACE FUNCTION fct_test1_sf (p_num IN NUMBER)
RETURN NUMBER
IS
BEGIN
UPDATE bb_test1
SET col1 = p_num;
RETURN p_num;
END;
B) CREATE OR REPLACE FUNCTION fct_test1_sf (p_num IN NUMBER)
RETURN NUMBER
IS
BEGIN
UPDATE bb_test1;
SET col1 = p_num;
RETURN p_num;
END;
C) CREATE OR REPLACE FUNCTION fct_test1_sf (p_num)
RETURN NUMBER
IS
BEGIN
UPDATE bb_test1
RETURN p_num;
END;
D) CREATE OR REPLACE FUNCTION fct_test1_sf (p_num IN NUMBER(6))
RETURN NUMBER
IS
BEGIN
UPDATE bb_test1
SET col1 = p_num;
RETURN p_num
END

Question 35

The term ____ is identified with a set of acronyms that indicate the restrictions on using the function.

A) compiler hint
B) purity level
C) pass by reference
D) pass by value

Question 36

____ refer to the arguments that are used when calling or invoking the program unit.

A) Actual parameters
B) Functions
C) Formal parameters
D) Procedures

Question 37

Deleting a program unit can be accomplished by issuing a(n) DEL command. _________________________

Question 38

The following code is an example of a(n) ____.
DECLARE
Lv_name_txt VARCHAR2(35);
Lv_id_num NUMBER(4) := 25;
Lv_first_txt VARCHAR2(15) := 'Scott';
Lv_last_txt VARCHAR2(20) := 'David';
BEGIN
Lv_name_txt := memfmt1_sf(lv_id_num,lv_first_txt, lv_last_txt);
DBMS_OUTPUT.PUT_LINE(lv_name_txt);
END;

A) procedure
B) function
C) parameter
D) anonymous block

Question 39

Which of the following code fragments would not raise an error?

A) DECLARE
V_amt1 number(5,2);
V_amt2 number(3,0);
BEGIN
V_amt1 := 32.50;
V_amt2 := ROUND(v_amt1)
DBMS_OUTPUT.PUT_LINE(v_ amt2);
END;
B) DECLARE
V_amt1 number(5,2);
V_amt2 number(3,0);
BEGIN
V_amt1 := 32.50;
V_amt2 := ROUND(v_amt1,1);
DBMS_OUTPUT.PUT_LINE(v_ amt2);
END;
C) DECLARE
V_amt1 number(5,2);
V_amt2 number(3,0);
BEGIN
V_amt1 := 32.50;
V_amt2 := ROUND v_amt1, 2;
DBMS_OUTPUT.PUT_LINE(v_ amt2);
END;
D) DECLARE
V_amt1 number(5,2);
V_amt2 number(3,0);
BEGIN
V_amt1 := 32.50;
V_amt2 := ROUND[v_amt1,0];
DBMS_OUTPUT.PUT_LINE(v_ amt2);
END;

Question 40

All of the following are purity level acronyms, except ____.

A) WNDS
B) RINDS
C) WNPS
D) RNPS

Question 41

What are the main differences between a function and a procedure?

Question 42

The ____ command is used to view parameter information.

A) DROP
B) SET
C) DESC
D) OUT

Question 43

The task of the ____________________ function is to use the two arguments provided, a numeric value and the degree of rounding, and return the resulting value.

Question 44

Discuss the techniques available in PL/SQL for passing values between actual parameters and formal parameters.

Question 45

What are formal and actual parameters?

Question 46

A(n) ____________________ cannot serve as an entire statement.

Question 47

____________________ cannot be used in SQL statements.

Question 48

You cannot include ____________________ information when declaring a formal parameter.

Question 49

In the code below, which of the following is the parameter variable?
CREATE OR REPLACE FUNCTION fct_test1_sf (p_num IN NUMBER)
RETURN NUMBER
IS
BEGIN
UPDATE bb_test1
SET col1 = p_num;
RETURN p_num;
END;

A) bb_test1
B) col1
C) p_num
D) fct_test1_sf

Question 50

Deleting a program unit can be accomplished by issuing a(n) ____________________ command.

Question 51

It is considered good form to return only one value from a function and to do so using the ____________________ statement.