QUESTION 20 A ____ reference is an automatically created variable that holds the
ID: 3568471 • Letter: Q
Question
QUESTION 20
A ____ reference is an automatically created variable that holds the address of an object and passes it to an instance method whenever the method is called.
A. key B. public C. that D. this
QUESTION 21
You can write as many constructors for a class as you want, as long as they all have different ____ lists.
A. object B. data field C. method D. parameter
QUESTION 22
A class diagram consists of a ____ divided into three sections.
A. square B. rectangle C. circle D. triangle
QUESTION 23 A catch block consists of four different elements: the keyword catch, followed by parentheses that contain an exception type and identifier, statements that take action to handle the error condition, an endcatch statement, and a return statement.
True
False
QUESTION 24
Design a class named CustomerRecord that holds a customer number, name, and address. Include methods to set the values for each data field and output the values for each data field. Create the class diagram and write the code (not language specific, ie. psuedocode) that defines the class.
QUESTION 25
Simple non-array variables are usually passed to methods by ____.
A. value B. reference C. type D. class
QUESTION 26
Unreachable code statements are program statements that only execute if there is an exception.
True
False
QUESTION 27
What is the screen output of the following code segment? Explain the reasoning behind your answer.
Test1 = 70
Test2 = 80
Test3 = 84
NumberOfTests = 3
Average = (Test1 + Test2 + Test3) / NumberOfTests
IF Average >= 90 THEN
Output "Great job"
Output "Your average is: ", Average
ELSE
IF Average >= 80 or Average <=89
THEN Output "Nice work"
Output "Your average is: ", Average
ELSE
Output : "Your Average is:", Average
Output ", You will do better next time!" ENDIF
QUESTION 28
An object is a category of things.
True
False
QUESTION 29
A method can be used more than once within a program or in other programs.
True
False
QUESTION 30
When a variable is declared within a method, it ceases to exist when the method ends.
True
False
QUESTION 31
The ability to use methods without knowing the details of their contents is a feature of ____.
A. abstraction B. encapsulation C. inheritance D. construction
QUESTION 32
____ is the process of creating a new, derived class from a base class.
A. Accessibility B. Encapsulation C. Inheritance D. Polymorphism
QUESTION 33
When illegal division by 0 takes place, an Exception object is not created automatically by the object-oriented language application.
True
False
QUESTION 34
Methods are sometimes called ____.
A. segments B. modules C. classes D. routines
QUESTION 35
A child class contains all the data fields and ____ of its parent.
A. parameters B. classes C. methods D. procedures
QUESTION 36
A(n) ____ is one instance of a class.
A. method B. object C. instantiation D. attribute
QUESTION 37
Write a method that will perform the a division operation (divide by) on the numbers passed to it in two variables (numerator, denominator) and outputs the results. Use a try-catch pair to output an error message if the illegal operation of divide by 0 occurs.
QUESTION 38
A method's ____ consists of the method's statements.
A. body B. space C. space D. group
QUESTION 39
Methods can be ____ correctly by providing different parameter lists for methods with the same name.
A. updated B. tested C. overloaded D. passed
QUESTION 40
The object-oriented techniques to manage errors such as dividing a value by 0 comprise the group of methods known as ____.
A. exception handling B. error handling C. exception processing D. error processing
QUESTION 41
Class diagrams are a type of ____ diagram.
A. Unified Illustration Language B. Unified Modeling Language C. Object-Oriented Modeling Language D. Unified Pseudocode Language
QUESTION 42
Creating multiple methods with the same name, which will act differently and appropriately when used with different types of objects, is known as polymorphism.
True
False 2
QUESTION 43
When a data field is private, it is said to be ____ to any class other than the one in which it is defined.
A. uninheritable B. implicit C. unreachable D. inaccessible
QUESTION 44
Programmers refer to hidden implementation details as existing in a ____.
A. white box B. white hole C. black box D. black hole
Explanation / Answer
QUESTION 20
A ____ reference is an automatically created variable that holds the address of an object and passes it to an instance method whenever the method is called.
A. key B. public C. that D. this
QUESTION 21
You can write as many constructors for a class as you want, as long as they all have different ____ lists.
A. object B. data field C. method D. parameter
QUESTION 22
A class diagram consists of a ____ divided into three sections.
A. square B. rectangle C. circle D. triangle
QUESTION 23:
A catch block consists of four different elements: the keyword catch, followed by parentheses that contain an exception type and identifier, statements that take action to handle the error condition, an end catch statement, and a return statement.
True
False
Reason: no return statement
QUESTION 24
Design a class named CustomerRecord that holds a customer number, name, and address. Include methods to set the values for each data field and output the values for each data field. Create the class diagram and write the code (not language specific, ie. psuedocode) that defines the class.
CustomerRecord
-customerNumber:int
-customerName:String
-customerAddress:String
+set customerNumber(name:String)
+set customerName(name:String)
+set customerAddress(name:String)
+print customerNumber(name:String)
+print customerName(name:String)
+print customerAddress(name:String)
QUESTION 25
Simple non-array variables are usually passed to methods by ____.
A. value B. reference C. type D. class
QUESTION 26
Unreachable code statements are program statements that only execute if there is an exception.
True
False
QUESTION 27
What is the screen output of the following code segment? Explain the reasoning behind your answer.
Test1 = 70
Test2 = 80
Test3 = 84
NumberOfTests = 3
Average = (Test1 + Test2 + Test3) / NumberOfTests
IF Average >= 90 THEN
Output "Great job"
Output "Your average is: ", Average
ELSE
IF Average >= 80 or Average <=89
THEN Output "Nice work"
Output "Your average is: ", Average
ELSE
Output : "Your Average is:", Average
Output ", You will do better next time!" ENDIF
Solution:
Your Average is:78, You will do better next time!
Reason
Calculated average= (70+80+84)/3= 78
It fails at first and second if so it prints the above output
QUESTION 28
An object is a category of things.
True
False
QUESTION 29
A method can be used more than once within a program or in other programs.
True
False
QUESTION 30
When a variable is declared within a method, it ceases to exist when the method ends.
True
False
QUESTION 31
The ability to use methods without knowing the details of their contents is a feature of ____.
QUESTION 32
____ is the process of creating a new, derived class from a base class.
A. Accessibility B. Encapsulation C. Inheritance D. Polymorphism
QUESTION 33
When illegal division by 0 takes place, an Exception object is not created automatically by the object-oriented language application.
True
False
QUESTION 34
Methods are sometimes called ____.
A. segments B. modules C. classes D. routines
QUESTION 35
A child class contains all the data fields and ____ of its parent.
A. parameters B. classes C. methods D. procedures
QUESTION 36
A(n) ____ is one instance of a class.
A. method B. object C. instantiation D. attribute
QUESTION 37
Write a method that will perform the a division operation (divide by) on the numbers passed to it in two variables (numerator, denominator) and outputs the results. Use a try-catch pair to output an error message if the illegal operation of divide by 0 occurs.
void methodDivide(int numerator,int denominator))
{
try
{
System.out.println(numerator/denominator);
}
catch(DivideByZeroException e)
{
System.out.println(e.getMessage);
}
}
QUESTION 38
A method's ____ consists of the method's statements.
A. body B. space C. space D. group
QUESTION 39
Methods can be ____ correctly by providing different parameter lists for methods with the same name.
A. updated B. tested C. overloaded D. passed
QUESTION 40
The object-oriented techniques to manage errors such as dividing a value by 0 comprise the group of methods known as ____.
A. exception handling B. error handling C. exception processing D. error processing
QUESTION 41
Class diagrams are a type of ____ diagram.
A. Unified Illustration Language B. Unified Modeling Language C. Object-Oriented Modeling Language D. Unified Pseudocode Language
QUESTION 42
Creating multiple methods with the same name, which will act differently and appropriately when used with different types of objects, is known as polymorphism.
True
False
QUESTION 43
When a data field is private, it is said to be ____ to any class other than the one in which it is defined.
A. uninheritable B. implicit C. unreachable D. inaccessible
QUESTION 44
Programmers refer to hidden implementation details as existing in a ____.
A. white box B. white hole C. black box D. black hole
CustomerRecord
-customerNumber:int
-customerName:String
-customerAddress:String
+set customerNumber(name:String)
+set customerName(name:String)
+set customerAddress(name:String)
+print customerNumber(name:String)
+print customerName(name:String)
+print customerAddress(name:String)