Multiple Choice Answers
1.Programmers refer to hidden implementation details as existing in a ____.
A) white box
B) white hole
C) black box
D) black hole
2.An object is a category of things.
3. Everything is an object, and every object is a member of a ____.
4.A(n) ____ is one instance of a class.
5.Libraries are collections of classes that serve related purposes.
6.Methods can be ____ correctly by providing different parameter lists for methods with the same name.
7.The call stack is where the computer stores the list of exceptions.
8.When a main() method needs to use another method, it calls, or invokes it.
9.A parent class is the same thing as a base class.
10.An instance method or constructor may be overloaded by providing the same name and ____ argument list.
A) a different
B) the same
C) a larger
D) a smaller
11.____ is the process of creating a new, derived class from a base class.
12.When illegal division by 0 takes place, an Exception object is not created automatically by the object-oriented language application.
13.The ability to use methods without knowing the details of their contents is a feature of ____.
14.Class diagrams are a type of ____ diagram.
A) Unified Illustration Language
B) Unified Modeling Language
C) Object-Oriented Modeling Language
D) Unified Pseudocode Language
15.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
16.Simple non-array variables are usually passed to methods by ____.
17.A ____ is one that sends an exception object out of a method so it can be handled elsewhere.
A) catch statement
B) throw method
C) catch block
D) throw statement
18.What is one item that must be included in a method’s header if it can receive a parameter?
A) local parameter name
B) global parameter name
C) parameter’s client
D) return data structure
19.Overloaded methods have the same name and parameter lists.
20.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.
21.What will be the output of the below program? List what will be outputed to the screen and explain your answer.
num SIZE = 10
num numbers[SIZE] = 0,0,0,0,0,0,0,0,0,0
index = 0
while index < SIZE
numbers[index]= index * 10
index = index + 1
output “The Output is: ”
while index > 0
index = index – 1
22.A method is a program module that contains a series of statements that carry out a task.
23.A constructor may require ____.
24.A child class contains all the data fields and ____ of its parent.
25.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.
26.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.
27.You can write as many constructors for a class as you want, as long as they all have different ____ lists.
B) data field
28.Creating multiple methods with the same name, which will act differently and appropriately when used with different types of objects, is known as polymorphism.
29.The memory location known as the ____ is where the computer stores the list of method locations to which the system must return.
A) method stack
B) location stack
C) call stack
D) store location
30.A(n) ____ statement indicates the end of the catch block in the pseudocode.
31.A method can be used more than once within a program or in other programs.
32.Methods are sometimes called ____.
33.A ____ is a segment of code that can handle an exception that might be thrown by the try block that precedes it.
A) catch method
B) throw block
C) catch block
D) throw statement
34.Global variables are known to the entire class.
35.____ variables and constants are those that are known to an entire class.
36.Unreachable code statements are program statements that only execute if there is an exception.
37.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
IF Average >= 80 or Average <=89 THEN
Output “Nice work”
Output “Your average is: “, Average
Output : “Your Average is:”, Average
Output “, You will do better next time!”
38.When appropriate, specialized ____ classes provide an elegant way for you to handle error situations.
39.When a variable is declared within a method, it ceases to exist when the method ends.
40.When a data field is private, it is said to be ____ to any class other than the one in which it is defined.
41.A method’s ____ consists of the method’s statements.
42.A class diagram consists of a ____ divided into three sections.
43.Multiple inheritance is the capability to inherit more than one method from a parent class.