Question 1

In black-box testing, the tester should already know something about how the program is implemented so that he/she can more carefully identify what portion(s) of the software may lead to errors.

Accepted Answer

In black-box testing, the tester does not need to know the implementation details of the software and instead focuses on testing the functionality from a user's perspective.

Question 2

It is not possible to test out any single method or class of a system until the entire system has been developed, and so all testing is postponed until after the implementation phase.

Accepted Answer

Testing can be done in a modular or incremental manner, where individual components or modules are tested as they are developed, even before the entire system is complete. This is known as unit testing and is an important part of the software development life cycle.

Question 3

In general, spending more time in development to ensure better software will
A) shorten testing time
B) slightly reduce maintenance efforts
C) slightly increase maintenance efforts
D) greatly reduce maintenance efforts
E) not alter the time it takes for any other stage

Accepted Answer

Spending more time in development to ensure better software leads to better quality code and fewer bugs, which greatly reduces the cost and effort needed for maintenance in the long run. This ultimately saves time and resources for the overall software development lifecycle.

Question 4

If classes C1 and C2 both implement an interface Cint, which has a method, whichIsIt, and if C1 c = new C1(); is performed at one point of the program, then a later instruction
c.whichIsIt(); will invoke the whichIsIt method defined in C1.

Accepted Answer

The answer of If classes C1 and C2 both implement...

Question 5

During program development, software requirements specify
A) how the program will accomplish the task
B) what task the program must perform
C) how to divide the task into subtasks
D) how to test the program when it is done
E) All of these

Accepted Answer

Software requirements specify what task the program must perform, not how it will accomplish it, how to divide it into subtasks or how to test it. These other aspects are specified in the design and development stages.

Question 6

The most important decisions regarding the development of a system are made during the implementation phase while code is actively being written.

Accepted Answer

The most important decisions regarding the development of a system are typically made during the planning and design phases, before implementation begins. While decisions may still need to be made during implementation, the foundation for the system has already been established.

Question 7

Once we have implemented the solution, we are not done with the problem because
A) the solution may not be the best or most efficient
B) the solution may have errors and need testing and fixing before we are done
C) the solution may, at a later date, need revising to handle new specifications
D) the solution may, at a later date, need revising because of new programming language features
E) All of these

Accepted Answer

All of the given options are possible reasons why we may not be completely done with a problem even after implementing a solution. The solution may need improvements, testing, revising, or updating in the future based on new specifications or programming language features. Therefore, it is important to keep revisiting and assessing the solution to ensure it remains effective and efficient.

Question 8

Any class can implement an interface, but no classes can implement more than a single interface.

Accepted Answer

A class can implement multiple interfaces.

Question 9

Assume that the class Bird has a static method fly(). If b is a Bird, then to invoke fly, you could do Bird.fly();.

Accepted Answer

This statement is true. Since fly() is a static method of the Bird class, it can be invoked using the class name Bird followed by the dot operator and the method name fly().

Question 10

The idea of having programmers and developers meet in order to critique a software design or implementation is known as
A) an interview
B) a walkthrough
C) prototyping
D) aggregation
E) evolutionary development

Accepted Answer

The activity described in the question, which involves programmers and developers meeting to critique a software design or implementation, is known as a walkthrough. A walkthrough is a type of peer review that aims to ensure that a software product meets its intended requirements, design, and coding standards. The other choices, such as interviews and prototyping, are also software development activities, but they do not specifically involve a group of programmers and developers critiquing a software design or implementation.

Question 11

Formal parameters are those that appear in the method call and actual parameters are those that appear in the method header.

Accepted Answer

Formal parameters are those that appear in the method header (definition), and actual parameters are those that appear in the method call (invocation).

Question 12

The graphical effect caused when a shape seems to resize as the mouse is dragged is known as rubberbanding.

Accepted Answer

Rubberbanding is a graphical effect caused when a shape seems to stretch or resize as the user drags the mouse cursor across the screen.

Question 13

Unlike the String class where you must pass a message to an object (instance) of the class, in order to use the Math class, you pass messages directly to the class name, as in Math.sqrt().

Accepted Answer

In order to use the Math class, you pass messages directly to the class name. For example, to find the square root of a number, you would call Math.sqrt(number).

Question 14

Interface classes cannot be extended but classes that implement interfaces can be extended.

Accepted Answer

Classes that implement interfaces cannot be extended, but they can be implemented by other classes that can be extended.

Question 15

All objects implement Comparable.

Accepted Answer

Not all objects implement the Comparable interface. Only those that explicitly implement Comparable can be compared using its compareTo method.

Question 16

Of the various phases in software development, which of the following is usually the lengthiest?
A) specification
B) design
C) implementation
D) testing
E) maintenance

Accepted Answer

Maintenance is typically the lengthiest phase in software development because it involves all activities required to correct faults, to improve performance or other attributes, and to adapt the software to a changed environment. This phase lasts from the product's release until its retirement, often spanning several years.

Question 17

Modifying a program in order to eliminate deficiencies is done in the __________ phase of the development cycle.
A) design
B) implementation
C) testing
D) use
E) maintenance

Accepted Answer

The answer of Modifying a program in order to eliminate...

Question 18

It is easier to correct errors found in a program if
A) they are identified early in the development cycle
B) they are identified during testing
C) they are identified during program use
D) they are identified during maintenance
E) All of the above are equally true; errors are easily corrected at any of these stages

Accepted Answer

It is easier to correct errors found in a program if they are identified early in the development cycle because it can save time and cost in the long run. If errors are identified during testing, program use, or maintenance, they may have already caused problems or have been more difficult to fix. Therefore, it is preferable to catch and fix errors as early as possible in the development process.

Question 19

The versions of an overloaded method are distinguished by the number, type, and order of their parameters.

Accepted Answer

This is the definition of overloading in Java.

Question 20

The activities of the development cycle are generally thought to
A) be strictly linear
B) be rigidly ordered
C) overlap
D) have optional steps
E) both A and B are true

Accepted Answer

The activities of development cycle frequently overlap, as different tasks may be worked on simultaneously by different team members.

Quiz 7: Object-Oriented Design

In black-box testing, the tester should already know something about how the program is implemented so that he/she can more carefully identify what portion(s) of the software may lead to errors.

It is not possible to test out any single method or class of a system until the entire system has been developed, and so all testing is postponed until after the implementation phase.

In general, spending more time in development to ensure better software will

If classes C1 and C2 both implement an interface Cint, which has a method, whichIsIt, and if C1 c = new C1(); is performed at one point of the program, then a later instruction c.whichIsIt(); will invoke the whichIsIt method defined in C1.

During program development, software requirements specify

The most important decisions regarding the development of a system are made during the implementation phase while code is actively being written.

Once we have implemented the solution, we are not done with the problem because

Any class can implement an interface, but no classes can implement more than a single interface.

Assume that the class Bird has a static method fly(). If b is a Bird, then to invoke fly, you could do Bird.fly();.

The idea of having programmers and developers meet in order to critique a software design or implementation is known as

Formal parameters are those that appear in the method call and actual parameters are those that appear in the method header.

The graphical effect caused when a shape seems to resize as the mouse is dragged is known as rubberbanding.

Unlike the String class where you must pass a message to an object (instance) of the class, in order to use the Math class, you pass messages directly to the class name, as in Math.sqrt().

Interface classes cannot be extended but classes that implement interfaces can be extended.

All objects implement Comparable.

Of the various phases in software development, which of the following is usually the lengthiest?

Modifying a program in order to eliminate deficiencies is done in the __________ phase of the development cycle.

It is easier to correct errors found in a program if

The versions of an overloaded method are distinguished by the number, type, and order of their parameters.

The activities of the development cycle are generally thought to