BE CSE 411606-CSE15 Software Quality Assurance and Testing Sathyabama University nov 2010

Register Number

                               

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act, 1956)

Course & Branch: B.E-CSE

Title of the Paper: Software Quality Assurance and Testing

Max. Marks: 80

Sub. Code: 411606-CSE15                                     Time: 3 Hours

Date: 10/11/2010                                                    Session: AN

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PART - A                (10 X 2 = 20)

Answer ALL the Questions

1.       Define a Test Case.

2.     Why is it important to develop test cases for both valid and invalid input conditions?

3.     Suppose a tester believes a unit contains a specification defect. Which testing strategy would be best to uncover the defect and why?

4.     function square_root

                                                message (x:real)

                                        when x >=0. 0

                                                reply (y:real)

                                                where y>=0.0 and approximately

                                        (y*y.x)

                                        else reply exception

                                imaginary_square_root

                                end function

A specification of a square root function id given above. Provide all the input equivalence classes for this module.

5.     Name same of the elements necessary to implement a defect prevention program.

6.     Summarize the issues that arise in Class Testing.

7.     What metrics would you suggest for monitoring the test status during system test for a large application with no-mission or safety critical features, developed in OO approach?

8.     What is the difference between software reliability and availability from the view point of a software user?

9.     What is the role of human factors in process assessment?

10.   List down the steps that are applied in the TMM ranking procedure.

PART – B                       (5 x 12 = 60)

Answer All the Questions

11.   Describe all the principles involved in the software testing process. Discuss all the intricacies involved in realizing each principle.

(or)

12.   Suppose you are testing a code component and you discover a defect: it calculates an output variable incorrectly.

                (a) How would you classify this defect?

                (b) What are the likely causes of this defect?

        (c) What steps could have been taken to prevent this type of defect from propagating to the code?

       

13.   Define the equivalence classes and boundary values and develop a set of test cases to cover them for the following module description: The module is part of a public TV membership system. The module allows entry of a contribution from $0.01 to $99,999.99. It also enters a member status for the contributor that can be: regular, student/retiree, or studio club.

(or)

14.   Suppose a program allowed a user to search a part name in a specific group of part records. The user inputs the record number that is believed to hold the part, and the part name to search for. The program will inform the user if the record number is within the legal range of allowed record numbers (1-1000). If it is not, then an error message will be issued-“record number is out of range”. If the record number is within the range, and the part is found, the program will return “part found”, else it will report “part not found”. Identify the input and output conditions, i.e., causes and effects. Draw a “cause-and –effect” graph and a decision table for this specification. From the table generate a set of test inputs and expected outputs.

15.   From your knowledge with online and / or catalog shopping, develop a use case to describe a user purchase of a television set with a credit card from an online vendor using web based software. With the aid of your use-case, design a set of tests you could be during system test to evaluate the software.

(or)

16.   (a) How would you define a software unit? In terms of your definitions, what constitutes a unit for the procedural code; for object-oriented code?

        (b) What are the key differences in integrating procedural-oriented systems as compared to object-oriented systems?

17.   (a) Summarize the benefits of putting a defect-prevention program in place.

        (b) Examine the role of the three critical groups in defect prevention.

(or)

18.   Investigate how the defect causal analysis is performed with a simple example.

19.   Describe the five-level structure of the Testing Maturity Model.

(or)

20.   Discuss any two industrial applications of the TMM applied to CMM.

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