NPTEL Software Testing | Week 6 Assignment Answers 2022

 

Week 6 : Assignment 6

Due date: 2022-09-07, 23:59 IST.

Assignment not submitted

1 point

While applying logic-based testing to test source code, is it true that the predicates can be taken exactly as they occur in code always?

 Yes, the predicates can be considered exactly as they occur in code.

 No, some times we have to add extra clauses to the predicate

1 point

How do logical predicates occur in finite state machines?

 The logical predicates occur as a part of the states of the finite state machines.

 The logical predicates occur as guards in the transitions of the finite state machines.

1 point

In a requirements specification document, where do logical predicates occur?

 They occur directly as a part of the requirements.

 They occur as pre-conditions, invariants and post-conditions in the requirements.

 All the conditions in requirements can be translated into predicates.

 Logical predicates cannot be found in requirements.

Answer the following questions for the method twoPred() below.
The method is called with two input parameters x and y.

public String twoPred (int x, int y)

{

    boolean z;

    if (x < y)

        z = true;

    else

        z = false;

    if (z && x+y == 10)

        return z;

    else

        return z-1;

}

1 point

State true or false: The internal variable z in the second predicate needs to be re-written in terms of the input parameters x and y.

 True

 False

1 point

Is it true that predicate coverage for the first predicate will also subsume predicate coverage for the second predicate?

 True

 False

1 point

How many test cases will be needed for clause coverage for the second predicate if we explicitly count the true and false values for each clause?

 Two test cases.

 Four test cases

1 point

State true or false: The set of test case inputs {(x=5,y=3),(x=4,y=6),(x=5,y=6)}$\{(x=5,y=3),(x=4,y=6),(x=5,y=6)\}$ will satisfy clause coverage for the second predicate.

 True

 False

1 point

State yes or no: The set of test case inputs {(x=5,y=3),(x=4,y=6),(x=5,y=6)}$\{(x=5,y=3),(x=4,y=6),(x=5,y=6)\}$

 Yes

 No

1 point

How many test cases are needed for satisfying RACC for all the clauses for the second predicate?

 Only one test case

 Two test cases

 Three test cases

 Five test cases

1 point

State true or false: The set of test case inputs {(x=4,y=6),(x=6,y=4),(x=4,y=5)}$\{(x=4,y=6),(x=6,y=4),(x=4,y=5)\}$ satisfy RACC for the second predicate.

 True

 False

You may submit any number of times before the due date. The final submission will be considered for grading.

Answers:

1. b

2. b

3. b

4. a

5. b

6. a

7. a

8. a

9. c

10. a

NOT 100%