IBPS IT SOl- Software Engineering- Functional and Non-Functional

Functional and Non-Functional 

1. Which one of the following is a functional requirement ?
a) Maintainability
b) Portability
c) Robustness
d) Testability
e) None of the mentioned

Answer:e
Explanation: All are non-functional requirements representing quality of the system. Functional requirements describe what the software has to do.

2. Which one of the following is a requirement that fits in a developer’s module ?
a) Availability
b) Testability
c) Usability
d) Flexibility

Answer:b
Explanation: A developer needs to test his product before launching it into the market.

3. “Consider a system where, a heat sensor detects an intrusion and alerts the security company.” What kind of a requirement the system is providing ?
a) Functional
b) Non-Functional
c) Known Requirement

Answer:a
Explanation: Functional requirements describe what the software has to do.

4. Which of the following statements explains portabililty in non-functional requirements?
a) It is a degree to which software running on one platform can easily be converted to run on another platform.
b) It can be enhanced by using languages, OS’ and tools that are universally available and standardized.
c) The ability of the system to behave consistently in a user-acceptable manner when operating within the environment for which the system was intended.
d) Both a and b
e) It refers to the level at which a software system uses scarce computational resources, such as CPU cycles, memory, disk space, buffers and communication channels.

Answer:d
Explanation: Option c is termed as reliability and option e refers to efficiency.

5. Functional requirements capture the intended behavior of the system.
a) True
b) False

Answer:a
Explanation: The behavior of functional requirements may be expressed as services, tasks or functions the system is required to perform.

6. Choose the incorrect statement with respect to Non-Functional Requirement(NFR).
a) Product-oriented Approach – Focus on system (or software) quality
b) Process-oriented Approach – Focus on how NFRs can be used in the design process
c) Quantitative Approach – Find measurable scales for the functionality attributes
d) Qualitative Approach – Study various relationships between quality goals

Answer:c
Explanation: Quantitative Approaches in NFRs are used to find measurable scales for the quality attributes like efficiency, flexibility, integrity, usability etc.

7. How many classification schemes have been developed for NFRs ?
a) Two
b) Three
c) Four
d) Five

Answer:d
Explanation: Software Quality Tree [Boehm 1976], Roman [IEEE Computer 1985], Process-Product-External considerations [Sommerville 1992], Mc Call’s NFR list and Dimensions of Quality–Components of FURPS+ are the five classification schemes for NFRs.
.

8. According to components of FURPS+, which of the following does not belong to S ?
a) Testability
b) Speed Efficiency
c) Serviceability
d) Installability

Answer:b
Explanation: Speed Efficiency belong to Performance (P) in FURPS+ .

9. Does software wear & tear by decomposition ?
a) Yes
b) No

Answer:b
Explanation: Unlike hardware, software is reliable.

10. What are the four dimensions of Dependability ?
a) Usability, Reliability, Security, Flexibility
b) Availability, Reliability, Maintainability, Security
c) Availability, Reliability, Security, Safety
d) Security, Safety, Testability, Usability

Answer:c
Explanation: All the traits of option c sync with dependability.

11. Choose the correct statement on how NFRs integrates with Rational Unified Process ?
a) System responds within 4 seconds on average to local user requests and changes in the environment.
b) System responds within 4 seconds on average to remote user requests and changes in the environment.

Answer:b
Explanation: System response to a local user is 2 seconds on average.

All the best for your exams @Mission IT SO 2016