Week 13

Question 1

• Implementation Hiding means

Answer 1

o Hiding the details of how a method works

Question 2

• Method cohesion

Answer 2

o A measure of how the internal statements serve to accomplish the methods purpose

Question 3

• A method with high cohesion has all of it’s ________ operarions

Answer 3

o Has all its internal operations focused on one task or goal

Question 4

• Low cohesion method traits

Answer 4

o Tries to do too many things

Question 5

• noticeable high cohesion method traits

Answer 5

o Easy to read, maintain, reliable

Question 6

o How much methods are connected/share information

Answer 6

• Method Coupling

Question 7

• Methods that are interdependent on each other have

Answer 7

o Tight coupling

Question 8

• Methods that are not interdependent

Answer 8

o Loose coupling
o Can be called in any order

Question 9

• Tightly coupled methods are known to use _____ level variables

Answer 9

o class

Question 10

• Tightly coupled methods are ____ to understand, and hard to ________

Answer 10

o Hard, maintain

Question 11

• T/F - Tightly coupled methods often have to be called in a certain order to work properly

Answer 11

o True

Question 12

• T/F – Global variables should be avoided to prevent tight coupling

Answer 12

o True (although Java does not have global vars, closest thing is a public class var)

Question 13

• T/F – A method with tight coupling and low cohesion is strong

Answer 13

o False

Question 14

• The word fragile is used to describe tight coupling and low cohesion

Answer 14

o True

Question 15

• What makes a good class?

Answer 15

o Represents a single concept

Question 16

• Bad class design

Answer 16

o Name does not tell you what it does

Question 17

• If the name of the class is a noun but a verb instead, you are making a mistake, why?

Answer 17

o You should be making a method instead of a class

Question 18

• Public methods for a class should be related to

Answer 18

 One single concept from the domain of what the class represents

Question 19

o If one class needs to call methods from another class it’s referred to as

Answer 19

 Object dependency

Question 20

o Placing method calls to java API also creates ______ ___________

Answer 20

method dependencies

Question 21

• Program outputs are best handled with a

Answer 21

o Dedicated output class

Question 22

o If you omit mutators from your class it becomes _________

Answer 22

immutable

Question 23

o An immutable class cannot be

Answer 23

 Changed after it has been created

Question 24

o Advantage of immutable objects? They can be freely references in

Answer 24

 They can be freely referenced in many places in a program, nothing can change its state unexpectedly

Question 25

o Mutable classes should follow the guideline: any method that accesses the objects values

Answer 25

 Should never change the object

Question 26

o Public methods are collectively referred to as

Answer 26

 Class-interface

Question 27

o When program logic places a method call it should only need to know

Answer 27

 The method name, parameters, and data to be returned