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1. For a given propositional logic formula, if all possible assignments of true/false values to the atomic propositions make the formula evaluate to true, what is the formula called?
a) The formula is a tautology. b) The formula is a satisfiable formula. c) The formula is a contradiction. d) The formula is invalid.
Answer:a) The formula is a tautology.
2. Consider the propositional logic formula φ=p∨q∨r. Which of the following true or false assignments to p, q, and r make the formula φ evaluate to false? In the options below T represents True and F represents False.
a) p=F, q=T, r=F b) p=T, q=F, r=F c) p=F, q=T, r=T d) p=F, q=F, r=F
Answer: d) p=F, q=F, r=F
3. Which logic coverage criterion tests for all possible assignments of true/false values but can get infeasible due to there being a large number of assignments?
a) Clause coverage b) General active clause coverage c) Correlated active clause coverage d) All combinations coverage
Answer:d) All combinations coverage
4. Which of the following is a correct order of subsumption amongst logic coverage criteria? In the options below, read → as ‘subsumes’.
a) Combinatorial coverage → General inactive clause coverage → Restricted inactive clause coverage b) Combinatorial coverage → General active clause coverage → Restricted inactive clause coverage c) Combinatorial coverage → Correlated active clause coverage → Predicate coverage d) Combinatorial coverage → General active clause coverage → Correlated active clause coverage
Answer:d) Combinatorial coverage → General active clause coverage → Correlated active clause coverage
These are Software Testing NPTEL Week 5 Assignment Answers
5. Consider a predicate p and a clause a in p. When evaluating pa, the conditions under which clause a determines p, if we get a value False, what does this indicate?
a) pa evaluating to False indicates that it is not possible for clause a to determine p. b) pa evaluating to False indicates that clause a always determines p, irrespective of the truth values of the other clauses.
Answer:a) pa evaluating to False indicates that it is not possible for clause a to determine p.
6. What is pa, the conditions under which clause a determines p?
a) pa = a b) pa = b c) pa = True d) pa = False
Answer:c) pa = True
7. What is pb, the conditions under which clause b determines p?
a) pb = a b) pb = b c) pb = True d) pb = False
Answer:c) pb = True
8. State yes or no: CACC pairs for the clauses a and b are the same as GACC pairs.
a) Yes b) No
Answer:b) No
9. State yes or no: RACC pairs for the clauses a and b are the same as CACC pairs.
a) Yes b) No
Answer:b) No
10. State yes or no: RICC tuples for the clauses a and b are not the same as CACC tuples.
a) Yes b) No
Answer:b) No
These are Software Testing NPTEL Week 5 Assignment Answers
