QA Testing Training | Importance of Testing and Types in Quality Assurance

What is the Importance of Testing

In the today’s fast growing world of the Internet customer wants to get products to be implemented and updated faster than their competitors. Customer want more for software releases with new features to be implemented in short time frame (as early as possible), but they don’t like to work with defected software. As next version of the product will releases in next few days, & gets only a couple of days of testing before it is shipped. So due to this short time frame or continuous releases the more bugs gets piled up into the products and which gets fixed in the next release, correct? Yes definitely, this model has its own problems. Releasing such software with so many bugs into it may affects the user experience which makes bad impact on quality impression of your company brand. They will remember about the delivered bad quality product, so there will be importance of testing which makes vital role in SDLC. Want to learn concepts from professionals see QA testing training by Learn IT Training.

Types of Testing in quality Assurance

Most of us have an experience that the software did not work properly as expected and it impacts more on organisation. This article sheds light on dynamic testing and its various types. Let’s see an introduction about dynamic testing in QA.

Dynamic testing is also known as Dynamic Analysis, mainly used to test the software by executing it. This also checks for dynamic behaviour of the code. To compile and execute the software, variable quantities such as response time, memory usage, CPU usage, and overall performance of the software will be analysed.

This involves working with software, the various combination of input values are provided and checked with the expected output. In verification and validation, this testing type is the validation part.

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Now let us see some of the dynamic testing methods in-detail:

Unit testing: Unit testing is a process in software development in which small individual and independent parts of an application called units are tested. Units are the smallest testable part of the Software system. This verifies the smallest entity in any software.

A system should be tested individually before integrating it because once the system is integrated; it becomes difficult to differentiate the occurrence of an error in which unit. Hence unit testing is mandatory before integrating the units.

Integration testing: In this method of testing, all the individual tested units are groups and the interface between the units are tested. This is mainly used to identify the problems in interface when two units are integrated. This is carried after unit testing.

The three main important approaches in integration testing are:

• Top down approach 
• Bottom up approach
• Big bang approach

System testing: System testing is testing the behaviour of the whole system or software as defined in the Software Requirement Specification (SRS). This is primarily employed to verify the fulfilment of customer requirements. This testing method is carried after integration testing. This test method also checks for functional and non-functional software requirements.

Even though the system testing differs from organization to organization, the following key testing types which need to be covered in system testing are listed below:

• Sanity testing
• Usability testing
• Stress testing
• Performance testing
• Regression testing
• Security testing
• Maintenance testing
• Accessibility testing

Acceptance testing: This type of testing is carried after system testing. During this type of testing most of the major bugs and defects have been fixed. Establishing confidence in delivering quality software or system that it meets the customer requirements is the main goal of Acceptance testing.

For Commercial Off the Shelf (COTS) software’s are meant for mass marketing needs by the potential users. There are two types of Acceptance testing namely:

• Alpha testing is applicable for software that is developed for mass marketing. This is conducted at the developer site, potential users site or developers organization which invites to use the system and report defects.
• Beta Testing is also known as field testing performed by existing users or customers at external sites with developers. This is used to determine that the software satisfies the customer requirements.

Where to learn QA testing?

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