Define software testing. explain its types?

Answer 1

Software testing is the process used to measure the quality of developed computer software.

According to definition given by The Institute of Electrical and Electronics Engineers, USA (IEEE) - Software testing is the process of analyzing a software item to detect the differences between existing and required conditions (that is, bugs) and to evaluate the features of the software item

According to the definition given by Dave Gelperin and William C. Hetzel - Software testing can be stated as the process of validating and verifying that a software program/application/product:

1. meets the requirements that guided its design and development

2. works as expected

3. can be implemented with the same characteristics

4. satisfies the needs of stakeholders

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Answer 2

Software Testing is an process of executing a program or a software with the intent of finding errors, validating against requirements. Testing involves operation of a system or application under controlled conditions and evaluating the results. Controlled conditions would include both normal and abnormal conditions. Software testing is conducted not only to check if the software meets the functional/technical/security requirements but also to break the software with negative inputs or incorrect usage.

Also, Software testing will only evaluate the quality of the software & will not improve the quality.

In simple terms The comparison of EV ( Expected value ) with the AV ( Actual value ) of any feature in an application or product is known as testing. If EV=AV then the result is pass or else it is fail . For more detailed information on software testing refer software testing complete theory on knol.Google.com

Answer 3

Software testing is the process of assessment of a software item to detect differences between given input and expected output. Testing measures the quality of the product. In other words, software testing is a verification and validation process.

Verification: Verification is the process to make sure the product fulfill the conditions imposed at the start of the development phase. In other words, to make sure the product behaves in the way it should be.

Validation: Validation is the process to make sure the product meet the specified requirements at the end of the development phase. In other words, to make sure the product is built as per customer requirements.

Types of testing:

1) Unit Testing: It includes of an individual unit or group of related units. It falls under the class of white box testing.

2) Integration Testing: It is testing in which a group of components are combined to produce output. It may fall under both white box testing and black box testing.

3) Functional Testing: To ensure that the specific functionality required in the system requirements works. It falls under the class of black box testing.

4) System Testing: To ensure that by putting the software in different environments (e.g., Operating Systems), works properly. It falls under the class of black box testing.

5) Regression Testing: is the testing after modification of a system, component, or a group of related units to ensure that the modification is working correctly and is not damaging or imposing other modules to produce unexpected results. It falls under the class of black box testing.

Answer 4

Software testing is a method of assessing the functionality of a software program.Software Testing is necessary because we all make mistakes. Some of those mistakes are unimportant, but some of them are expensive or dangerous. We need to check everything and anything we produce because things can always go wrong humans make mistakes all the time.