Question { 6208 }

what is lamda expression?

Answer

lambda expression :
Lambda expression is introduce in c# version 3.0.Its a method without having declaration,
A lambda expression is a anonymous function mostly used to create delegate in LINQ.
 Syntax:

parameter => expression or statement block.

simple program to understand lambda expreesion


class A
{
// we have to declare delegate here

public delegate int B(int a);

static void main()
{
B b=a=>a*a;
int res=b(5);
Console.WriteLine("result = ",res);
}
}

Question { Ness Technologies, 11365 }

What is the difference between smoke an sanity testing with
example ?

Answer

Smoke Testing - testing the major functionality of the application by the development team before deploy the application into testing environment is called smoke testing.

Sanity Testing- testing the major functionality of the application is called sanity testing.once the application has developed and deploy into testing environment, We can performing the sanity testing, because if the major functionality is working properly, then only we can continue further testing in the application.

Definition wise only we have difference between sanity and smoke testing but practically both are same because only testing team performing the major functionality of the application in testing environment. That why some tester in some project called as sanity testing and some tester in some project called as smoke testing.

Question { 12025 }

What is a test case?

Answer

Test case is noting but sequential,elaborative and executable form of the requirement.

In every project we are getting the requirement in the shortcut format, with short cut format of the requirements, it is very difficult for us to perform testing on the application, so we are using test cases to easily solve such problem.

Question { Confidential, 8984 }

Black box Testing

Answer

Black Box:
 Performing testing on the application with functional knowledge id called as black box testing.

Techniques
1 BVA
2 Ecp
3 Error guessing

Question { IBM, 7568 }

What is mutation testing?? And when we use it??

Answer

Mutation Testing
Performing Testing on the application after the development team has changed the source code intentionally is called as mutation testing.

After completion of unit testing activity in our project that means we have to write the test cases for unit  testing and execute it then at that time developer changes the source code to verify all the test cases which can be used during unit testing is giving the pass result or fail one ..if all the  same test cases giving the pass result then we don't execute all possibility of unit testing.so we have to write another cases for unit testing and perform testing on the basis of those test cases and repeat the process until some of the test cases provides false result in mutation testing.