Quiz 3
Only one answer is correct
* Required
ID
*
Your answer
What is reliability?
*
The probability that a system will operate with failures under lower performance
The probability that a system will operate without failures for a given time interval
The probability that a system will operate according to a specific operational profile for a given time interval
The probability that a system will operate without failures under given conditions for a given time interval
The probability that a system will operate with failures under given conditions
What is the severity of a failure?
*
The userâ€™s perception of the failure
An issue is severe if it is a cosmetic change
An issue is severe if it must be worked 24 hour a day, 7 days a week until it is solved
The impact of the failure on the system
The user's stress for the failure's occurrence
What is the major difference between fault and failure
*
A failure occurs before deployment and a fault after deployment
A fault is in design and a failure is in code
A fault is static and a failure is dynamic
A fault is dynamic and a failure is static
There is no difference
What is an operation profile for a system?
*
A set of run types that a program can execute along with their probabilities with which they will occur
A set of probabilities associated to failures that have been occurred in a given time window
The probability of a run
The probability of failures in a run
What is a prediction system?
*
A model inferred from the data and a set of measures to predict future behaviour
A family of models of different types
A set of measures with which to compare different types of such models
A model inferred from the data derived from a family of lines
Which of the following statements is true?
*
To prevent faults in requirements include vague terms
To prevent faults in requirements avoid discussing them with developers
To prevent faults in requirements avoid dead variables
To prevent faults in requirements avoid TBD sentences
None of them
Why hardware and software reliability are different?
*
In software reliability, most failures are due to testers defects rather than designers
In software reliability, most failures are due to lack of resources rather than lack of material
In software reliability, most failures are due to design and implementation defects rather than wear out
In software reliability, most failures are due to methods of development rather than production
In software reliability, most failures are due to design and implementation defects rather than wear out
What does a bath tube curve represent?
*
The number of failures in a system
The time of failure
The reliability function of a system
The density function of the time of failure
The hazard rate in time
In a nonrepairable system, what is the expected mean of Time of failure, T
*
The integral of the function "t*f(t)" over the whole domain of the probability density function f(t)
The average of the failure times over a period of time
The integral of the cumulative distribution function F(t) over the whole domain of the probability density function f(t)
The average of the failures over the whole domain of the probability density function f(t)
The sum over the output set of the function "t*p(t)" over the whole domain of the probability density function f(t)
Submit
Page 1 of 1
Never submit passwords through Google Forms.
This content is neither created nor endorsed by Google.
Report Abuse

Terms of Service

Additional Terms
Forms