Plz Any one tell my doubts in Testing

1.What is the ONE key element of 'test case'?
2.What is the ONE key element of a Test Plan?
3.What is Metrics?
4.What is a Test procedure?
5.What is the difference between SYSTEM TESTING and END-TO-END TESTING?
6.What is Traceability Matrix and Test Matrix? Is there any interchangeable term for Traceability Matrix ?Are Traceability Matrix and Test Matrix same or Different ?
7.What are test bugs?
8.Define Quality - bug free, Functionality working or both?
9.What is the most challenging situation you had during testing?
10. What are the types of functional testing?
11.What is the difference between smoke testing and sanity testing?
12.Entry criteria and Exit criteria ?
13.Test plan and it's contents?
14.severity & priority?
15.V - Model and its advantage?
16. Exceptional testing?
17.what is web server?
18.Which Methodology you follow in your Testcase?
19.What is the bug found in yahoo site?
20.Write test cases on Hand Watch and also on ATM Machine?

1. test plan and uses cases from developers
2.test strategy and methodology
3.Fp and Loc
4.step by step execution of test case
5.both are same
6.in traceability we have TRM of 16 factors that should be considered before test plan and afrer test case completion we prepare RTM to trace the test cases
tes matrix is nothing but Data Matrix
7.When u feel some thing differed frrom actual charcterstic then we can say it is Test Bug

remaining u can get from test books
19,20 i am not aware of those

4. Its a document providing detailed instruction for the execution of test case.

5. Systen Testing can be limited upto functional as well as non functional testing of the System, but when we talk about end-to-end testing, all the interfaces, sub-systems must come into picture. All the end-to-end scenarios should be considered and executed before dployment of the system into actual environment.

6. its a document which showing the relationship between the test case and the requirement.

8. quality - fitness to use.
bug free - How much the application is working without bugs.

9. I have faced a lot, cant able to explain in words.

11. Smoke testing is nothing but a functional testing, but this will be achieved by the Tester.
Sanity testing: it is same as smoke testing, but the testing process will be done by developer itself.

12.Entry criteria are
Business document
functional document
Test case preparation
Build to test

Exit criteria including when
all the functionalities are tested
When achieved the dead line
when defect rate falls below a certai level

13. test plan is nothing but a documentation consisting the overall activies of the testing process in a project.
test plan contents includes
introduction
objective
scope
test strategy(What are the testing methods you are going to approach)
Environment requirement
test schedule
control procedure (contains review, bug review, defect reporting)
resource and responsibilies
suspention and exit criteria
resumption criteria

14.Severity : Severity will be mention by the tester. severity will tell us how bad the defect is going to affect the functionality.
In our concern we are handling 4 severity
low, medium, high and fatal/emergency

Priority: Its developer duty, how the priority to fix the bug.
they will give more importance to emergency and then high, medium and low

19. i think they cracked the site through sql injection

1.understanding the usecases
2. practice writing the test cases
3.quarter all the tasks that tha company will measure
4.it is a functional level term and used to perform testing on a functinality in
an efficient effective and optimised way.
5.system testing meands if one performs testing on system is called system testing . it is a black bo testing.system means once the integrartion is completed and the application is ready to install in to the environment .
end to end testing, it is a type of testing in which it perfrms testing on one complete transaction from one end to another end.
6.it is a ducument which is developed by test engineet accrding to the custmer reuirements