Perfective Maintenance _____

question 56

Multiple Choice

Perfective maintenance _____.

• A) adds enhancements to an operational system and makes the system easier to use
• B) diagnoses and corrects errors in an operational system
• C) involves changing an operational system to make it more efficient,reliable,or maintainable
• D) competes for resources in an operational system

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Definitions:

Cluster Sampling

A probability sampling method in which the population is first divided into clusters and then a simple random sample of the clusters is taken.

Simple Random Sampling

A sampling method where each member of the population has an equal chance of being selected, ensuring unbiased representation.

Stratified Simple Random Sampling

A sampling method that divides a population into smaller groups or strata and then selects random samples from each stratum.

Convenience Sampling

A nonprobability method of sampling whereby elements are selected for the sample on the basis of convenience.