NPTEL Software Testing Assignment 8 Answer

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NPTEL Software Testing Assignment

ABOUT THE COURSE :

This course will cover various techniques for test case design, as used for testing of software artifacts including requirements, design and code. We will discuss algorithms and techniques for test case design based on graphs, logic, syntax of programming languages and on inputs. Special techniques for testing object-oriented features and web applications will also be discussed. The course will end with symbolic testing techniques. These broadly will cover test cases for both white-box and black-box.

INTENDED AUDIENCE: Any Interested Learners

PRE-REQUISITES: Programming, Algorithms, Discrete Mathematics (basics)

INDUSTRY SUPPORT: The material of this course has been used to offer training for Samsung, ABB and Mindtree. The course will be useful for any firm that does tests their software.

Next Week Assignment Answers

This course can have Associate in Nursing unproctored programming communication conjointly excluding the Proctored communication, please check announcement section for date and time. The programming communication can have a weightage of twenty fifth towards the ultimate score.

Final score = Assignment score + Unproctored programming exam score + Proctored Exam score

Assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
( All assignments in a particular week will be counted towards final scoring – quizzes and programming assignments).
Unproctored programming exam score = 25% of the average scores obtained as part of Unproctored programming exam – out of 100
Proctored Exam score =50% of the proctored certification exam score out of 100

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF ASSIGNMENT SCORE >=10/25 AND
UNPROCTORED PROGRAMMING EXAM SCORE >=10/25 AND PROCTORED EXAM SCORE >= 20/50.

If any one of the 3 criteria is not met, you will not be eligible for the certificate even if the Final score >= 40/100.

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1 point

Consider the regular expression $(a + b) \cdot (a + b) *$ over the alphabet $Σ = {a, b}$ . Which of the following options represents a list of words generated by this regular expression?

$a b, a, a a b .$

$a b a b, b a b a b .$

$a a a, b b b .$

All of the above.

Ans – D

1 point

For the same regular expression $(a + b) \cdot (a + b) *$ , which of the following options represents the language corresponding to the regular expression?

The language is the set of all words over $a$ and $b$ that have at least one $a$ and at least one $b$ in them.

The language is the set of all words over $a$ and $b$ that have at least one $a$ or at least one $b$ in them.

Ans – B

1 point

While parsing a program to extract syntactic information, which of the following defines how characters form tokens?

Regular expressions.

Context-free grammars.

Context-sensitive grammars.

The normal form of the grammar.

Ans -D

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1 point

Consider the context-free grammar given by $G = (N, T, P, S)$ where $N = {S, X}, T = {a, b}, P = {S \to a X b, X \to a b}$ . Which of the following is the language generated by this grammar?

The language generated by $G$ is ${w | w = a a b b} .$

The language generated by $G$ is ${w | w$ is of the form $a^{n} b^{n}, n \geq 1}$

Ans – A

1 point

State yes or no: Is the ground string in mutation testing the same as the program under test?

Yes.

No.

Ans – A

1 point

Which of the following is a mutant that can be killed by any test case?

Dead mutant.

Equivalent mutant.

Trivial mutant.

Idempotent mutant.

Ans – C

1 point

Suppose a decision statement like if (x < 0 && z == 5) is mutated to get if (x > 0 && z == 5) then it is an example of which kind of mutation operator?

Replacing a logical operator.

Replacing a relational operator.

Replacing a decision statement.

Replacing a condition statement.

Ans – C

1 point

As per the lectures, replacing a particular assignment statement with a statement like failOnZero() is an example of a mutation operator applied at which of the levels in testing?

Program level.

Integration level.

Statement level.

De-bugging level.

Ans – C

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1 point

A programmer decides to save time and apply two or three mutation operators together to increase the chances of finding many errors together. Is this considered to be a useful strategy in mutation testing?

Yes, it will find many errors early.

No, mutation operators work best when applied one at a time.

Ans – B

1 point

State true or false: Mutation testing can be used to show that a program behaves identically when a particular operation is replaced or removed.

True.

False.

Ans – B

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NPTEL Software Testing Assignment

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