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Posted By: Saral Mariyaprakasam Member Level: Silver Posted Date: 02 May 2008
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2007 Birla Institute of Technology-Mesra MS Software Engineering Software Testing Methodologies University Question paper
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Birla Institute of Technology and Science, Pilani
Distance Learning Programmes Division
MS Software Engineering in Collaboration with Wipro Technologies
Mid semester Examination
Regular
Course No. : SEWP ZG552
Course Name : Software Testing Methodologies
Nature of Exam : Closed Book Exam Bangalore
Weightage : 40 %
Duration : 2 Hours No of pages : 9
Date :11th March 2007 (AN) No. of questions : 5
Important Notes:
1. Answers must be precise, and to the point.
2. Assume suitable data when necessary. State the assumptions made clearly.
3. Please write the answers only in the space provided after the question in the question paper itself.
4. You can use the regular answer books provided for rough work. The rough shall not be graded and will not have any weightage.
5. Illustrate with diagrams and tables for clarity.
6. In the event of multiple cancellations of answers and running out of space, you can use the answer books provided. Mark the answers with the question numbers.
7. Show the calculations clearly with all steps for the problems.
8. Use of scientific calculator is allowed.
Good Luck!
-------------------------------------------------------------------------------------------------------
Name : __________________________________________
Student ID : __________________________________________
Question # Marks Obtained Max Marks
1 8
2 8
3 8
4 8
5 8
Total 40
Q1: (8):
A salesman sells locks, stocks and barrels on a monthly basis; the salesperson reports how many of each he or she has sold.
The parts sell for the following:
Locks $45 each
Stocks $30 each
Barrels $25 each
Commission is computed on sales:
10% on sales up to $1000; 15% on the next $800; and 20% on the amount over $1800
Source code for the problem:
Private Sub buggyCommission(locks As Integer, stocks As Integer, barrels As Integer, commission As Currency)
'PROGRAM Commission Faulty Version
Const lock_price As Currency = 45
Const stock_price As Currency = 30
Const barrel_price As Currency = 25
Dim sales As Currency
sales = lock_price * locks + stock_price * stocks + barrel_price * barrels
Node (0)
If (sales > 1800) Then
Node (1)
commission = 0.1 * 1000
commission = commission + 0.15 * 800
commission = commission + 0.2 * (sales - 1200)
ElseIf (sales > 1100) Then
Node (2)
commission = 0.1 * 1000
commission = commission + 0.15 * (sales - 1000)
Else:
Node (3)
commission = 0.1 * sales
End If
Node (4)
End Sub
For the above problem derive the following,
(3 marks) Derive equivalence classes for each of input/output, tabulate them, and clearly state the sub-domains. Use traditional input domain equivalence class(strong robust equivalence class)
(3 marks) Justify your choice of sub-domains.
(2 marks) Identify the logical error in the source code.
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Q2: (8) design a decision table or cause effect graph for following requirement
(If you think that the requirements conflict; make suitable assumptions and state them clearly)
(Note: Ensure that the assumptions do not change the problem definition itself)
The word-processor may present portions of text in three different formats: plain text (p), boldface (b), italics (i). The following commands may be applied to each portion of text: make text plain (P), make boldface (B), make italics (I), emphasize (E), super emphasize (SE). Commands are available to dynamically set E to mean either B or I (we denote such commands as E=B and E=I, respectively.) Similarly, SE can be dynamically set to mean either B (command SE=B) or I (command SE=I), or B and I (command SE=B+I.)
Please ensure following points are covered in the decision table or cause effect graphing.
(3 marks)Finding all the cause and marking them
(3 marks)Finding all the effect and marking them to appropriate cause
(2 marks)Reducing the test combinations
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Q3: (8) Explain at least 4 types of code coverage metrics that are practices in white box testing. (explanation should cover following points, Aim of testing, advantages, disadvantages) (each metrics carry 2 marks)
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Q4: (8) please provide the formula and results for following calculations.
(3 marks)What is the formula to find the number of general boundary value test cases. There are 2 numeric variables x and y how may test cases you will generate based on the formula.
Answer:
Formula: _____________
Value : _____________
(2 marks)What is the formula to find the number of combinations that will be covered in decision tree? And how many combinations, we can cover if we have 2 causes with 3 value and 3 cause with 2 values.
Answer:
Formula: _____________
Value : _____________
(3 marks)What is the formula to find the cyclomatic complexity of a program? What will be the cyclomatic complexity of a program which has 21 edges and 16 nodes.
Answer:
Formula: _____________
Value : _____________
Q5: (8) Explain 4 basic Violations of Structured Programming that affects the Cyclomatic complexity as per McCabe’s essential complexity theory.
(each violation carries 2 marks)
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