Select the best answer.The probability that a machine will run for a given amount of time without breakdown is called... availability. maintainability. quality rate. reliability rate.

A system starts working at time t = 0. Its lifetime has approximately a normaldistribution with mean value μ = 120 and standard deviation σ = 24 *hours+. After afailure, the system is replaced by an equivalent new one in negligible time andimmediately resumes its work. How many spare systems must be available in order tobe able maintain the replacement process over an interval of length 1000 hours(1) with probability 0.60?(2) with probability 0.79 ?

A server has a Mean Time Between Failures (MTBF) of 50,000 hours and a Mean Time To Repair (MTTR) of 4 hours. What is the availability of the server expressed as a percentage?Group of answer choices99.98%99.6%99.92%99.992%99.8%

What is characterized as the ability of a system to recover from failures and continue to function? ReliabilityPredictabilityScalability

How is software reliability defined?a.timeb.efficiencyc.qualityd.speed

_____is a function of failure rate, ability to recover from failures, and general robustness of operations