Paper 2 CS · UNIT 06 · MOCK TEST

Mock 13 – Quality, Reliability & Maintenance (Part 3)

Unit 6: Software Engineering · 21 questions · about 25 minutes. Press End Mock any time to see your score and the correct answers.

All 15 topic-wise mocks in this unit

0 / 21 answered 00:00

Q1. Which of the following is not one of three software product aspects addressed by McCall's software quality factors?

AAbility to undergo change BAdaptability to new environments COperational characteristics DProduction costs and scheduling

Q2. A server has 30 days mean time between failure (MTBF) and 12 hours mean time to repair (MTTR). The availability of the server is approximately:

A96.3% B97.3% C98.3% D99.3%

Q3. Software safety is quality assurance activity that focuses on hazards that

Aaffect the reliability of a software component Bmay cause an entire system to fail Cmay result from user input errors Dprevent profitable marketing of the final product

Q4. The extent to which a software performs its intended functions without failures, is termed as ______.

ARobustness BCorrectness CReliability DAccuracy

Q5. The extent to which a software tolerates the unexpected problems, is termed as:

AAccuracy BReliability CCorrectness DRobustness

Q6. Which one of the following statements is incorrect?

APareto analysis is a statistical method used for analyzing causes BReliability specifies the probability of failure-free operation for a given time duration CSystem reliability can be specified as the Mean Time To Failure (MTTF) DIn white-box testing, test cases are decided from specifications or requirements

Q7. Adaptive maintenance is a maintenance which ______.

Acorrects errors that were not discovered till the testing phase Bis carried out to port the existing software to a new environment Cimproves the system performance Dboth (2) and (3)

Q8. The following table shows the time between failures (in hours) observed for a piece of software:

Error number	1	2	3	4	5
Time since last failure (hours)	6	4	8	5	6

Assuming an exponential reliability model, what is the reliability of the system for one hour of operation?

Ae^(-9/29) Be^(-7/29) Ce^(-5/29) De^(-3/29)

Q9.

Which of the followings belongs to MaCall's quality factors?

A. Maintainability

B. Usability

C. Integrity

D. Functionality

AA and D Only BA, B and D Only CC and D Only DA, B and C Only

Q10.

The ratio of errors found before s/w delivery and to the total errors (before and after) is called :

AAccuracy BSpecificity CDefect Removal efficiency DThrough put

Q11.

Which of the following is not the goal of reverse Engineering?

ACope with Complexity BRecover lost information CDetect side effect DData flow

Q12.

The time between failures for a software system is: failure 1 – 6 hours, failure 2 – 4 hours, failure 3 – 8 hours, failure 4 – 5 hours, failure 5 – 6 hours. The reliability of the system for one hour of operation, assuming an exponential model, is

Ae^(−9/29) Be^(−7/29) Ce^(−5/29) De^(−3/29)

Q13.

Modifying the software to match changes in the ever-changing environment is called as

AAdaptive maintenance BCorrective maintenance CPerfective maintenance DPreventive maintenance Q

Q14.

A system has uptime and has a mean‐ 1 day time‐between‐failure of . How fast does the system has to repair itself in order to reach this availability goal?

A~9 Seconds B~10 Seconds C~11 Seconds D~12 Seconds

Q15.

In the context of Software Configuration Management (SCM), what kind of files should be committed to your source control repository?

A. Code files

B. Documentation files

C. Output files

D. Automatically generated files that are required for your system to be used

AA and B only BB and C only CC and D only DD and A only

Q16.

Modifying the software by restructuring is called

AAdaptive maintenance BCorrective maintenance CPerfective maintenance DPreventive maintenance L

Q17.

Software reliability is described with respect to

(A) Execution Time

(B) Calendar Time

A(A) and (B) only B(B) and (C) only C(A), (B) and (C) D(A) and (C) only

Q18.

According to ISO 9126, match List I with List II. List I: (a) Functionality, (b) Reliability, (c) Efficiency, (d) Maintainability. List II: (i) Relationship between level of performance and amount of resources, (ii) Characteristics related to achievement of purpose, (iii) Effort needed to make improvements, (iv) Capability of software to maintain its performance.

A(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) B(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii) C(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) D(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

Q19.

Software reuse is

Athe process of analysing software with the objective of recovering its design and specification Bthe process of using existing software artifacts and knowledge to build new software Cconcerned with reimplementing legacy system to make them more maintainable Dthe process of analysing software to create a representation of a higher level of abstraction and breaking software down into its parts to see how it works

Q20.

Which of the following terms best describes Git?

AIssue Tracking System BIntegrated Development Environment CDistributed Version Control System DWeb-based Repository Hosting Service

Q21.

A software system crashed 20 times in the year 2017 and for each crash, it took 2 minutes to restart. Approximately, what was the software availability in that year ?

A96.9924% B97.9924% C98.9924% D99.9924%

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