Answer:
Interoperability is the ability of or degree to which two or more systems usefully exchange information via interfaces in particular context. Interoperability can be defined in two ways which includes the ability to exchange data (syntactic interoperability) and also the ability to correctly interpret the data being exchanged (semantic interoperability).
If two systems failed to exchange information properly, it means they are not clear to interpret and not easy to communicate and get proper information from each other and that might result in a failed communication which is in turn result in security flaw.
Other quality attributes strongly related (at least potentially) to interoperability is Application Programming Interface (API)
API is a software intermediary that allows two applications to communicate to each other and are necessary for systems interoperability.
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Answer:
Instance variables can be declared anywhere inside a class.
Although there isn't any rule to declare instance variables before methods, and they can be declared anywhere in the class, they cannot be declared inside method definitions of class.
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<em>By convention class names begin with an uppercase letter, and method and variable names begin with a lowercase letter.</em> - True.
<em>Instance variables exist before methods are called on an object, while the methods are executing and after the methods complete execution.</em> - True.
<em>A class normally contains one or more methods that manipulate the instance variables that belong to particular objects of the class.</em> - True
