多选题Given that b and c refer to instances of wrapper classes， which two statements are true？（）Ab.equals（b） returns true.Bb.equals（c） returns the same result as b == c.Cb.eqials（c） can return false even if c.equals（b） returns true.Db.equals（c） throws an exc

第1题：

Given that b and c refer to instances of wrapper classes， which two statements are true？（）

• A、 b.equals（b） returns true.
• B、 b.equals（c） returns the same result as b == c.
• C、 b.eqials（c） can return false even if c.equals（b） returns true.
• D、 b.equals（c） throws an exception if b and c are different wrapper types.
• E、 b.equals（c） returns false if the type of wrapper objects being compared are different.

第2题：

10. public class MyClass {  11.  12. public Integer startingI；  13. public void methodA（） {  14. Integer i = new Integer（25）；  15. startingI = i；  16. methodB（i）；  17. }  18. private void methodB（Integer i2） {  19. i2 = i2.intValue（）；  20.  21. }  22. }  If methodA is invoked， which two are true at line 20？（）

• A、 i2 == startingI returns true.
• B、 i2 == startingI returns false.
• C、 i2.equals（startingI） returns true.
• D、 i2.equals（startingI） returns false.

第3题：

Which four statements correctly describe functions that are available in SQL? （）

• A、INSTR returns the numeric position of a named character.
• B、NVL2 returns the first non-null expression in the expression list.
• C、TRUNCATE rounds the column, expression, or value to n decimal places.
• D、DECODE translates an expression after comparing it to each search value.
• E、TRIM trims the heading of trailing characters (or both) from a character string.
• F、NVL compares two expressions and returns null if they are equal, or the first expression of they are not equal.
• G、NULLIF compares twp expressions and returns null if they are equal, or the first expression if they are not equal.

第4题：

Identify the two situations in which you use the alert log file in your database to check the details.（）

• A、Running a query on a table returns "ORA-600： Internal Error."
• B、Inserting a value in a table returns "ORA-01722： invalid number."
• C、Creating a table returns "ORA-00955： name is already used by an existing object."
• D、Inserting a value in a table returns "ORA-00001： unique constraint （SYS.PK_TECHP） violated." 
• E、Inserting a row in a table returns "ORA-00060： deadlock detected while waiting for resource."

第5题：

Which two statements are true about standard database auditing（）

• A、DDL statements can be audited.
• B、Statements that refer to stand-alone procedure can be audited.
• C、Operations by the users logged on as SYSDBA cannot be audited.
• D、Only one audit record is ever created for a session per audited statement even though it is executedmore than once.

第6题：

Which two statements are true regarding single row functions?（）

• A、They accept only a single argument 
• B、They can be nested only to two levels 
• C、Arguments can only be column values or constants 
• D、They always return a single result row for every row of a queried table 
• E、They can return a data type value different from the one that is referenced

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第13题：

Which of the following statements are true？（） 

• A、 The equals（） method determines if reference values refer to the same object.
• B、 The == operator determines if the contents and type of two separate objects match.
• C、 The equals（） method returns true only when the contents of two objects match.
• D、 The class File overrides equals（） to return true if the contents and type of two separate objects        match.

第14题：

Which two statements are true about mouse button variables?（）

• A、SYSTEM.MOUSE_BUTTON_PRESSED returns a string. 
• B、SYSTEM.MOUSE_BUTTON_PRESSED returns a numeric value. 1Z0-132 World Leaders In Certifications Material - Test-king.com 
• C、A possible value for SYSTEM.MOUSE_BUTTON_MODIFIERS is Control+Alt+Delete. 
• D、SYSTEM.MOUSE_BUTTON_MODIFIERS can only be references in form-level triggers. 
• E、SYSTEM.MOUSE_BUTTON_MODIFIERS identifies which special key was pressed in conjunction with the usual mouse button action. 

第15题：

Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them?（）

• A、The two statements produce identical results.
• B、The second statement returns a syntax error.
• C、There is no need to specify DESC because the results are sorted in descending order by default.
• D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.

第16题：

Which statement is true regarding the COALESCE function?（）

• A、It can have a maximum of five expressions in a list 
• B、It returns the highest NOT NULL value in the list for all rows 
• C、It requires that all expressions in the list must be of the same data type 
• D、It requires that at least one of the expressions in the list must have a NOT NULL value

第17题：

Which four statements correctly describe functions that are available in SQL? （）

• A、INSTR returns the numeric position of a named character.
• B、NVL2 returns the first non-null expression in the expression list.
• C、TRUNCATE rounds the column, expression, or value to n decimal places.
• D、DECODE translates an expression after comparing it to each search value.
• E、TRIM trims the heading or trailing characters (or both) from a character string.
• F、NVL compares two expressions and returns null if they are equal, or the first expression if they are not equal.
• G、NULLIF compares two expressions and returns null if they are equal, or the first expression if they are not equal.

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