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Atomicity
One of the four required characteristics of all database transactions. A database transaction must be an “all-or-nothing” affair. If any part of the transaction fails, the entire transaction must be rolled back as if it never occurred. The assurance that an operation either changes the state of all participating objects consistent with the semantics of the operation or changes none at all.
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One of the four required characteristics of all database transactions (the other three are atomicity, consistency, and isolation). The concept that database transactions must be resilient. Once a transaction is committed to the database, it must be preserved. Databases ensure durability through the use of backup mechanisms, such as transaction logs.
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Logical coherency among all integrated parts; also, adherence to a given set of instructions or rules. One of the four required characteristics of all database transactions (the other three are atomicity, isolation, and durability). All transactions must begin operating in an environment that is consistent with all of the database’s rules.
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Scripted transactions with known expected results. The testers run the synthetic transactions against the tested code and then compare the output of the transactions to the expected state. Any deviations between the actual and expected results represent possible flaws in the code and must be further investigated.
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An object is highly cohesive if it can perform a task with little or no help from other objects. Highly cohesive objects are not as dependent on other objects as objects with lower cohesion. Objects with higher cohesion are often better. Highly cohesive objects perform tasks alone and have low coupling.
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MAC is a means of restricting access to data based on varying degrees of security requirements for information contained in the objects. A policybased means of restricting access to objects based on the sensitivity (as represented by a label) of the information contained in the objects and the formal authorization (access control privileges) of subjects to access information of such sensitivity. Means of restricting access to objects based on the sensitivity of the information contained in the objects and the formal authorization (i. e. , clearance, formal access approvals, and needtoknow) of subjects to access information of such sensitivity. (. See discretionary access control. )
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