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CSE 2221 - Midterm 1 - Set 1
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CSE 2221 - Midterm 1 - Set 1
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CSE 2221 - Midterm 1 - Set 1Object - ANS-a software bundle of related state and behavior often used to model the
real-world objects that you find in everyday life. Stores its state in fields (variables in
some programming languages) and exposes its behavior through methods (functions in
some programming languages).
class - ANS-a blueprint or prototype from which objects are created.
inheritance - ANS-provides a powerful and natural mechanism for organizing and
structuring your software.
interface - ANS-a contract between a class and the outside world. When a class
implements an interface, it promises to provide the behavior published by that interface.
Package - ANS-a namespace for organizing classes and interfaces in a logical manner.
Placing your code into packages makes large software projects easier to manage.
two characteristics of an object - ANS-state and behavior
data encapsulation - ANS-a fundamental principle of object-oriented programming.
benefits of objects - ANS-Modularity
Information-Hiding
Code re-use
Pluggability and debugging ease
modularity - ANS-The source code for an object can be written and maintained
independently of the source code for other objects. Once created, an object can be
easily passed around inside the system.
information hiding - ANS-By interacting only with an object's methods, the details of its
internal implementation remain hidden from the outside world.
code reuse - ANS-If an object already exists (perhaps written by another software
developer), you can use that object in your program. This allows specialists to
implement/test/debug complex, task-specific objects, which you can then trust to run in
your own code.
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