PLSQL INTERVIEW QUESTIONS

21) Procedure and Functions are explicitly executed. This is different from a database trigger. When is a database trigger executed?

1. When the transaction is committed 2. During the data manipulation statement

3. When an Oracle supplied package references thetrigger

4. During a data manipulation statement and when thetransaction is committed

22) Which Oracle supplied package can you use to output values and messages from database triggers, stored procedures and functions within SQL*Plus?

1. DBMS_DISPLAY 2. DBMS_OUTPUT 3. DBMS_LIST 4. DBMS_DESCRIBE

23) What occurs if a procedure or function terminates with failure without being handled? 1. Any DML statements issued by the construct arestill pending and can be committed or rolled back.

2. Any DML statements issued by the construct arecommitted

3. Unless a GOTO statement is used to continueprocessing within the BEGIN section, the constructterminates.

4. The construct rolls back any DML statements issuedand returns the unhandled exception to the callingenvironment.

24) Examine this code BEGIN theater_pck.v_total_seats_sold_overall := theater_pck.get_total_for_year;

END; Q) For this code to be successful, what must be true?1. Both the V_TOTAL_SEATS_SOLD_OVERALL variable and the GET_TOTAL_FOR_YEAR function must exist only in the body of the THEATER_PCK package.

2. Only the GET_TOTAL_FOR_YEAR variable must exist in the specification of the THEATER_PCK package.

3. Only the V_TOTAL_SEATS_SOLD_OVERALL variable must exist in the specification of the THEATER_PCK package.

4. Both the V_TOTAL_SEATS_SOLD_OVERALL variable and the GET_TOTAL_FOR_YEAR function must exist in the specification of the THEATER_PCK package.

25) A stored function must return a value based on conditions that are determined at runtime. Therefore, the SELECT statement cannot be hard- coded and must be created dynamically when the function is executed. Which Oracle supplied package will enable thisfeature?

1. DBMS_DDL

2. DBMS_DML

3. DBMS_SYN

4. DBMS_SQL

PLSQL INTERVIEW QUESTIONS

16) Which procedure can be used to create a customizederror message?1. RAISE_ERROR2. SQLERRM3. RAISE_APPLICATION_ERROR 4. RAISE_SERVER_ERROR 17) The CHECK_THEATER trigger of the THEATER table has been disabled. Which command can you issue to enable this trigger? 1. ALTER TRIGGER check_theater ENABLE;2. ENABLE TRIGGER check_theater; 3. ALTER TABLE check_theater ENABLE check_theater; 4. ENABLE check_theater; 18) Examine this database trigger CREATE OR REPLACE TRIGGER prevent_gross_modification{additional trigger information} BEGIN IF TO_CHAR(sysdate, DY) = MON THEN RAISE_APPLICATION_ERROR(-20000, Gross receipts cannot be deleted on Monday); END IF; END; This trigger must fire before each DELETE of theGROSS_RECEIPT table. It should fire only once for the ent. What additional information must you add? 1. BEFORE DELETE ON gross_receipt 2. AFTER DELETE ON gross_receipt 3. BEFORE (gross_receipt DELETE) 4. FOR EACH ROW DELETED FROM gross_receipt 19) Examine this function: CREATE OR REPLACE FUNCTION set_budget (v_studio_id IN NUMBER, v_new_budget IN NUMBER) IS BEGIN UPDATE studio SET yearly_budget = v_new_budgetWHERE id = v_studio_id; IF SQL%FOUND THENRETURN TRUEl;ELSERETURN FALSE;END IF; COMMIT;END;

Which code must be added to successfully compile thisfunction?

1. Add RETURN right before the IS keyword.

2. Add RETURN number right before the IS keyword.

3. Add RETURN boolean right after the IS keyword.

4. Add RETURN boolean right before the IS keyword.

20) Under which circumstance must you recompile the package body after recompiling the packagespecification?

1. Altering the argument list of one of the packageconstructs

2. Any change made to one of the package constructs

3. Any SQL statement change made to one of thepackage constructs

4. Removing a local variable from the DECLARE sectionof one of the package constructs

PLSQL INTERVIEW QUESTIONS

13) Read the following code:

CREATE OR REPLACE FUNCTION get_budget

(v_studio_id IN NUMBER)RETURN number ISv_yearly_budget NUMBER; BEGINSELECT yearly_budgetINTO v_yearly_budgetFROM studioWHERE id = v_studio_id; RETURN v_yearly_budget;

END;

Which set of statements will successfully invoke this function within SQL*Plus? 1. VARIABLE g_yearly_budget NUMBEREXECUTE g_yearly_budget := GET_BUDGET(11);

2. VARIABLE g_yearly_budget NUMBEREXECUTE :g_yearly_budget := GET_BUDGET(11);

3. VARIABLE :g_yearly_budget NUMBEREXECUTE :g_yearly_budget := GET_BUDGET(11);

4. VARIABLE g_yearly_budget NUMBER:g_yearly_budget := GET_BUDGET(11);

14) Read the following code: CREATE OR REPLACE PROCEDURE update_theater (v_name IN VARCHAR v_theater_id IN NUMBER)

IS

BEGIN

UPDATE theater SET name = v_name WHERE id = v_theater_id; END update_theater;

When invoking this procedure, you encounter the error: ORA-000: Unique constraint (SCOTT.THEATER_NAME_UK) violated.

How should you modify the function to handle thiserror?

1. An user defined exception must be declared andassociated with the error code and handled in theEXCEPTION section.

2. Handle the error in EXCEPTION section byreferencing the error code directly.

3. Handle the error in the EXCEPTION section byreferencing the UNIQUE_ERROR predefined exception.

4. Check for success by checking the value ofSQL%FOUND immediately after the UPDATE statement.

15) Read the following code:

CREATE OR REPLACE PROCEDURE calculate_budget IS v_budget studio.yearly_budget%TYPE; BEGIN v_budget := get_budget(11); IF v_budget <> What effect will this have?

1. The GET_BUDGET function will be marked invalid andmust be recompiled before the next execution.

2. The SET_BUDGET function will be marked invalid andmust be recompiled before the next execution.

3. Only the CALCULATE_BUDGET procedure needs to berecompiled.

4. All three procedures are marked invalid and mustbe recompiled.

PLSQL INTERVIEW QUESTIONS

7) what are the commands used to open a CURSOR FOR loop
are --
1. open

2. fetch
3. parse

4. None, cursor for loops handle cursor openingimplicitly.

8) What happens when rows are found using a FETCH statement
1. It causes the cursor to close 2. It causes the cursor to open 3. It loads the current row values into variables 4. It creates the variables to hold the currentrow values

9) Read the following code:
CREATE OR REPLACE PROCEDURE find_cpt (v_movie_id
{Argument Mode} NUMBER, _cost_per_ticket
{argument mode} NUMBER)
IS BEGIN IF v_cost_per_ticket > 8.5 THEN SELECT cost_per_ticket INTO v_cost_per_ticket FROM gross_receipt WHERE movie_id = v_movie_id; END IF; END;

Q) Which mode should be used for V_COST_PER_TICKET?
1. IN
2. OUT
3. RETURN 4. IN OUT

10) Read the following code:
CREATE OR REPLACE TRIGGER update_show_gross {trigger information} BEGIN {additional code} END; The trigger code should only execute when the column, COST_PER_TICKET, is greater than $3.
Which trigger information will you add?
1. WHEN (new.cost_per_ticket > 3.75)

2. WHEN (:new.cost_per_ticket > 3.75

3. WHERE (new.cost_per_ticket > 3.75)

4. WHERE (:new.cost_per_ticket > 3.75)

11) What is the maximum number of handlers processed before the PL/SQL block is exited when an exception occurs?
1. Only one
2. All that apply
3. All referenced

4. None

12) For which trigger timing can you reference the NEW and OLD qualifiers?
1. Statement and Row
2. Statement only

3. Row only

4. Oracle Forms trigger

PlSQl Interview Questions

1) Which of the following statements is true aboutimplicit cursors?

1. Implicit cursors are used for SQL statements thatare not named.

2. Developers should use implicit cursors with greatcare.

3. Implicit cursors are used in cursor for loops tohandle data processing.

4. Implicit cursors are no longer a feature in Oracle.

2) Which of the following is not a feature of a cursorFOR loop?

1. Record type declaration.

2. Opening and parsing of SQL statements.
3. Fetches records from cursor.

4. Requires exit condition to be defined.

3) A developer would like to use referential datatypedeclaration on a variable. The variable name isEMPLOYEE_LASTNAME, and the corresponding table
and column is EMPLOYEE,and LNAME, respectively.

How would the developer define this variable using referential datatypes?

1. Use employee.lname%type.
2. Use employee.lname%rowtype.
3. Look up datatype for EMPLOYEE column on LASTNAMEtable and use that.

4. Declare it to be type LONG.

4) Which three of the following are implicit cursorattributes?
1. %found
2. %too_many_rows3. %notfound
4. %rowcount5. %rowtype

5) If left out, which of the following would cause aninfinite loop to occur in a simple loop?
1. LOOP
2. END LOOP
3. IF-THEN
4. EXIT

6) Which line in the following statement will produce an error?
1. cursor action_cursor is
2. select name, rate, action
3. into action_record
4. from action_table;
5. There are no errors in this statement.