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CSE 2221 Final Exam Questions and Verified Answers, 100% Guarantee Pass A+
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CSE 2221 Final-.pdf file:///C:/Users/HP/Desktop/pppppp/CSE%202221%20Final-CSE 2221 Final
1. The Implements Relation: The implements relation may hold between a class and an
interface. If C implements I then class C contains code for the behavior specified in interface I.
This means that C has method bodies for instance methodswhose contracts are specified in I.
The code of C looks like this:
class C implements I {
// bodies for methods specified in I
}
The implements relation allows you to separate contracts from their implementa-tions- a best
practice for component design.
2. The Extends Relation: The extends relation may hold between: 2 interfaces or2 classes.
If B extends A then B inherits all the methods of A. This means B implicitly starts out with all
the method contracts (for an interface) or all the method bodies (for a class) that A has. B can
then add more method contracts (for an interface) or methodbodies (for a class).
3. Overloading: A method (name) is overloaded when 2 or more methods have thesame name,
in which case methods must differ in the number and/or types of their formal parameters
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(which the compiler uses to disambiguate them)
4. Interface Extension: If I1 and I2 are interfaces and I2 extends I1, then the codeof I2 looks like
this:
interface I2 extends I1{
//contracts for methods added in I2
}
For interfaces all such methods are instance.
5. Testing: Testing is a technique for trying to refute the claim that a method bodyis correct for
the method contract. In other words, the goal of testing is to show thatthe method body does not
correctly implement the contract i.e. that it is defective
6. Tree Representation of Expression: Each operand (1,2,3,4,5,..) of an operator(+ - * /) must
be evaluated before that operator can be evaluated
7. UnitTesting: Best practice to test individual units of components of software (oneclass, one
method at a time)
8. Integration Testing: Testing what happens when multiple components are puttogether
into a larger system
9. System testing: testing a whole end-user system
10. Method Correctness: Look at method's contract, which is a specification of its intended
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behaviors. The actual behaviors of the method (see body) must be withinthe allowed behaviors
of the method (see contract).
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