MCQ Set71

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.
A) True
B) False
3. Everything is an object, and every object is a member of a ____.
A) class
B) method
C) case
D) process
4.A(n) ____ is one instance of a class.
A) method
B) object
C) instantiation
D) attribute

5.Libraries are collections of classes that serve related purposes.
A) True
B) False

6.Methods can be ____ correctly by providing different parameter lists for methods with the same name.
A) updated
B) tested
C) overloaded
D) passed

7.The call stack is where the computer stores the list of exceptions.
A) True
B) False

8.When a main() method needs to use another method, it calls, or invokes it.
A) True
B) False

9.A parent class is the same thing as a base class.
A) True
B) False

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.
A) Accessibility
B) Encapsulation
C) Inheritance
D) Polymorphism

12.When illegal division by 0 takes place, an Exception object is not created automatically by the object-oriented language application.
A) True
B) False

13.The ability to use methods without knowing the details of their contents is a feature of ____.
A) abstraction
B) encapsulation
C) inheritance
D) construction

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 ____.
A) value
B) reference
C) type
D) class

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.
A) True
B) False

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.
// Declarations
num index
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
output numbers[index]

22.A method is a program module that contains a series of statements that carry out a task.
A) True
B) False

23.A constructor may require ____.
A) parameters
B) methods
C) objects
D) inheritance

24.A child class contains all the data fields and ____ of its parent.
A) parameters
B) classes
C) methods
D) procedures

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.
Class diagram

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.
A) True
B) False

27.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

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.
A) True
B) False

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.
A) finalcatch
B) finally
C) endcatch
D) stop

31.A method can be used more than once within a program or in other programs.
A) True
B) False

32.Methods are sometimes called ____.
A) segments
B) modules
C) classes
D) routines

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.
A) True
B) False

35.____ variables and constants are those that are known to an entire class.
A) Global
B) Local
C) Universal
D) Comprehensive

36.Unreachable code statements are program statements that only execute if there is an exception.
A) True
B) False

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.
A) Exception
B) Error
C) Constructor
D) Event

39.When a variable is declared within a method, it ceases to exist when the method ends.
A) True
B) False

40.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

41.A method’s ____ consists of the method’s statements.
A) body
B) space
C) space
D) group

42.A class diagram consists of a ____ divided into three sections.
A) square
B) rectangle
C) circle
D) triangle

43.Multiple inheritance is the capability to inherit more than one method from a parent class.
A) True
B) False