Question

With respect to graphic functions and graphics programming, discuss the black box and the system it describes.

Answer 1

Black Box Testing is also known as behavioral, opaque-box, closed-box, specification-based or eye-to-eye testing.

It is a Software Testing method that analyses the functionality of a software/application without knowing much about the internal structure/design of the item that is being tested and compares the input value with the output value.

The main focus in Black Box Testing is on the functionality of the system as a whole. The term ‘Behavioral Testing’ is also used for Black Box Testing. Behavioral test design is slightly different from the black-box test design because the use of internal knowledge isn’t strictly forbidden, but it’s still discouraged.

Each testing method has its own advantages and disadvantages. There are some bugs that cannot be found using the only black box or only white box technique.

Majority of the applications are tested by Black Box method. We need to cover the majority of test cases so that most of the bugs will get discovered by a Black-Box method.

This testing occurs throughout the software development and Testing Life Cycle i.e in Unit, Integration, System, Acceptance, and Regression Testing stages.

This can be both Functional or Non-Functional.

Types Of Black Box Testing

Practically, there are several types of Black Box Testing that are possible but if we consider the major variant of it then below mentioned are the two fundamental ones.

#1) Functional Testing

This type deals with the functional requirements or specifications of an application. Here, different actions or functions of the system are being tested by providing the input and comparing the actual output with the expected output.

#2) Non-Functional Testing

Apart from the functionalities of the requirements, there are several non-functional aspects as well that are required to be tested to improve the quality and performance of the application.

Black Box Testing Techniques

In order to systematically test a set of functions, it is necessary to design test cases. Testers can create test cases from the requirement specification document using the following Black Box Testing techniques.

• Equivalence Partitioning
• Boundary Value Analysis
• Decision Table Testing
• State Transition Testing
• Error Guessing
• Graph-Based Testing Methods
• Comparison Testing