INF3705 KEY POINTS FINAL EXAM (ACTUAL 2025/2026)
QUESTIONS AND VERIFIED ANSWERS GUARANTEE A+ PLUS
What are the most important dimensions of dependability? - --
-Answers----availability, reliability, safety, security, and
resilience.
Sociotechnical systems include - ---Answers----computer
hardware, software, and people, and are situated within
an organization.
Sociotechnical systems are designed to support - ---
Answers----organizational or business goals and objectives.
The use of a dependable, repeatable process is essential if - --
-Answers----faults in a system are to be minimized.
What is essential to the development of dependable systems?
- ---Answers----The use of redundancy and diversity in
hardware, software processes, and software systems.
What should the dependable, repeatable process include? - ---
Answers----verification and validation activities at all stages,
from requirements definition through to system
implementation.
,What do formal methods do? - ---Answers----Formal
methods, where a formal model of a system is used as a basis
for development, help reduce the number of specification and
implementation errors in a system.
Why does formal methods have a limited take-up industry? - -
--Answers----because of concerns about the cost-
effectiveness of this approach.
Software reliability can be achieved by - ---Answers----
avoiding the introduction of faults, by detecting and removing
faults before system deployment, and by including fault-
tolerance facilities that allow the system to remain operational
after a fault has caused a system failure.
Reliability requirements can be defined - ---Answers----
quantitatively in the system requirements specification.
Reliability metrics include - ---Answers----probability of
failure on demand (POFOD), rate of occurrence of failure
(ROCOF), and availability (AVAIL).
Functional reliability requirements are - ---Answers----
requirements for system functionality, such as checking
and redundancy requirements, which help the system meet its
non-functional reliability
requirements.
, Dependable system architectures are - ---Answers----
system architectures that are designed for fault tolerance.
What are the number of architectural styles support fault
tolerance? - ---Answers----protection systems, self-
monitoring
architectures, and N-version programming.
Software diversity is difficult to achieve because - ---
Answers----it is practically impossible to ensure that each
version of the software is truly independent.
Dependable programming relies on - ---Answers----
including redundancy in a program as checks on the validity of
inputs and the values of program variables.
Statistical testing is used to - ---Answers----estimate
software reliability.
What does statistical testing rely on? - ---Answers----It
relies on testing the system with
test data that matches an operational profile, which reflects
the distribution of inputs to the
software when it is in use.
QUESTIONS AND VERIFIED ANSWERS GUARANTEE A+ PLUS
What are the most important dimensions of dependability? - --
-Answers----availability, reliability, safety, security, and
resilience.
Sociotechnical systems include - ---Answers----computer
hardware, software, and people, and are situated within
an organization.
Sociotechnical systems are designed to support - ---
Answers----organizational or business goals and objectives.
The use of a dependable, repeatable process is essential if - --
-Answers----faults in a system are to be minimized.
What is essential to the development of dependable systems?
- ---Answers----The use of redundancy and diversity in
hardware, software processes, and software systems.
What should the dependable, repeatable process include? - ---
Answers----verification and validation activities at all stages,
from requirements definition through to system
implementation.
,What do formal methods do? - ---Answers----Formal
methods, where a formal model of a system is used as a basis
for development, help reduce the number of specification and
implementation errors in a system.
Why does formal methods have a limited take-up industry? - -
--Answers----because of concerns about the cost-
effectiveness of this approach.
Software reliability can be achieved by - ---Answers----
avoiding the introduction of faults, by detecting and removing
faults before system deployment, and by including fault-
tolerance facilities that allow the system to remain operational
after a fault has caused a system failure.
Reliability requirements can be defined - ---Answers----
quantitatively in the system requirements specification.
Reliability metrics include - ---Answers----probability of
failure on demand (POFOD), rate of occurrence of failure
(ROCOF), and availability (AVAIL).
Functional reliability requirements are - ---Answers----
requirements for system functionality, such as checking
and redundancy requirements, which help the system meet its
non-functional reliability
requirements.
, Dependable system architectures are - ---Answers----
system architectures that are designed for fault tolerance.
What are the number of architectural styles support fault
tolerance? - ---Answers----protection systems, self-
monitoring
architectures, and N-version programming.
Software diversity is difficult to achieve because - ---
Answers----it is practically impossible to ensure that each
version of the software is truly independent.
Dependable programming relies on - ---Answers----
including redundancy in a program as checks on the validity of
inputs and the values of program variables.
Statistical testing is used to - ---Answers----estimate
software reliability.
What does statistical testing rely on? - ---Answers----It
relies on testing the system with
test data that matches an operational profile, which reflects
the distribution of inputs to the
software when it is in use.
