Functional:Checking the behavioral of functional reaquirements of application.
1.Behavioral coverage/Gui coverage
2.Error handling Coverage
3.input doamin coverage
4.manipulations coverage
5.Backend coverage
6.Functionality order coverage

Gui Coverage:In this coverage testengineer obserevs the behaviour of objects in screens of product with respect to corresponding functionality and validate changes in properties values of objectx.
Error handling coverage:In this coverage testengineer obserevs the behaviour of objects wiht respect of invalid events
Input domain coverage:Test Engineers go to special treatment to input domain testing in terms of boundary value analysys(BVA),Equliance partiniong(EQA)on range or size of input object.
manipulations coverage:In this coverage testengineers validate output or outcome of that corresponding functionality at the end.
Backend coverage:In this coverage testengineers validate  the impact of Front-end functionality on the backend databases tables in terms of data validatin and data integrity.
Functional order coverage:In this coverage test engineers find place of testing functionality in that product.

Non-Functional Testing: it considered in complets and probably will not recive the appropriate attention.
1.Performance
2.Security
3.Compatibility
4.installation
Performence:This testing conducted to mesure speed of processing of a system.
1.Stress
2.Load.
3.Volume
Stress:Execution of our application under pre determine levels of resources and peak load of estimate the performence is called.
Load:Execution of our application under pre determine levels of resources and customer expected load estimate the performence is called
Volume: Execution application under huge amount of resurces such as memory size or database size.
 Security:Whether it is valid user accessible or not and an invalid user is preventable or not.
compatibility: whether our application is working on customer expected plat froms or not.that is operating systems,compilers,browsers,and other system testing