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what is differnce between functional and non functional testing?

Asked by: Interview Candidate | Asked on: Oct 26th, 2006
Showing Answers 1 - 7 of 7 Answers
vijaya

Answered On : Oct 27th, 2006

 Functional testing is conducted to check the functional requirements in the AUT are satisfied or not

Non Functional testing is conducted for the external environments of the application like performance,load etc.,

  
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Subbu4testing

Answered On : Oct 30th, 2006

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Functional testinf means checking the functionality or behaviour of the sftware

non functional testing means not considering the functionality of the code

here we are checking the Quality atributes like performance,usability

  
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Sejal

Answered On : Nov 27th, 2006

Functional Testing: testing the features related to the application under test

Non- functional testing: deals with external factors like memory leaks, threads, cpu utilization etc

  
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Rasool

Answered On : Nov 12th, 2008

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                     Functional testing means we do functional testing to validate the functionality of the application against functional requirements document.we test for functionality of the application only. 

                     Non-functional testing means we do not test for functionality of the application System testing, load testing, stress testing, performance testing etc come under non functional testing.

  
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Shakkila

Answered On : Nov 14th, 2008

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Functional testing : Testing the behaviour of the apllication , Here testing is done based on the external behaviour of the application , Internal code is not mattered.
Ex : Suppose if we click a "Submit " button after giving all the details in a relevant page , is it getting saved ? Or is it giving the relevant error message , This is an ex for Functional Tesrting
Non Functional Testing : Testing which is related to performance & internal coding comes under Non Functional testing

  
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sharads

Answered On : Jul 13th, 2009

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Functional

To verify requirements, specifications, rules, objectives, algorithms, etc.

Non-Functional (Operational)
To verify that the system will work in production and will provideconsistent and predictable level of service. It includes measuringresource utilization, performing high volume stress tests, testingsystem break points and testing performance bottlenecks.

  
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avanianand

Answered On : Jul 30th, 2010

View all answers by avanianand

Functional Testing: Testing the application against business requirements. Functional testing is done using the functional specifications provided by the client or by using the design specifications like use cases provided by the design team.

Functional testing is concerned with the functional requirements and covers how well the system executes its functions. These include user commands, data manipulation, searches and business processes, user screens, and integrations.

Non-Functional Testing: Testing the application against client's and performance requirement. Non-Functional testing is done based on the requirements and test scenarios defined by the client.

Non-functional testing is concerned with the non-functional requirements and is designed to evaluate the readiness of a system according to several criteria not covered by functional testing. It enables the measurement and comparison of the testing of non-functional attributes of software systems.

  
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