development & testing

development & testing 

After the system has been designed,now the programmer should develop and create the system,and he must try and test ti see whether there is any mistake or no.

Testing strategies:

the programmer will do a comparing between the expected and the actual result.if the comparing was same then this mean that there is no error in the system but if he found that the actual result was different then he should check the system to solve the error.

another way of testing the data is the types of data that will reduce chances of mistake is the data types.

this an example that will explain the different types of data.

as we know that the marks of a student is more than or equal than zero or less than or equal than 100.

the first type is when the data is normal like 60 or 70 or 90.so the data will accept the input.

second type is the abnormal data and this happen when the data that has been input is not within the range at all.and so the system wont accept the data.

and the last type is the extreme data is when the inputted data at its maximum or minimum range and in our example the two extreme data is 0 and 100 and the system will accept the data.

& the minimum is: