Software Design Techniques

anyone can build a software to last a month, but it takes a good developer to design software that is _________

stable and long lived

what are the phases of learning programming?

Programming principles, Design principles, Object oriented concepts

what is OOP?

OOP is a programming paradigm based on defining, creating, and manipulating objects to develop feasible software

What does APIE stand for?

Abstraction, Polymorphism, Inheritance, Encapsulation

design principles are a set of _______

high level guidelines

3 design principles?

Open-close principle

Favor composition over inheritance

Liskov substitution principle

what does each pattern describe (design)?

a problem that occurs frequently in our environment, and the solution to said problem, in such a way that you can use that solution a million times over and never repeat yourself

what are 3 design patterns?

State design pattern, memento design pattern, composite design pattern

A pattern has four essential elements:

pattern name, problem, solution, consequences

the problem describes?

when to apply a pattern

true or false: the solution to a pattern describes a concrete design or implementation

false

consequences often concern?

space and time

T/F: there can only be one top level public class per file in java?

True

Package _______

com.yourCompanyName

the java programming language is ______-typed

statically

what does statically typed mean?

the variables must first be declared before they can be used

primitive data types:

boolean, char, byte, short, int, long, float, double

T/F: It's not always necessary to assign a value when a field is declared

True, considered bad programming practice

T/F: the compiler assigns a default value to an
uninitialized local variable

False

how to print in java?

system.out.println()

main function args?

public static void main(String [] args)

you can call a constructor from another constructor using ____ keyword

this()

the new operator returns a what

returns a reference to the object that was created in heap memory

to inherit a calls, use the _____ keyword

extends

override annotation is _____

@override

T/F: every class has Class Object as a superclass

True

packages are _____ for classes

containers for classes

the toString method for Class Object returns what?

a string consisting of the name of the class for the object instance

the @ sign character

unassigned hexadecimal representation of the hash code of the object

in java, strings are:

objects

The static keyword is used to create fields and methods that belong to the _______ rather than ________

class, to an instance of the class

a final class cannot be _____

subclassed

Abstract classes
cannot be instantiated, but they can be ____

subclassed

in the interface, all elements of the body are what?

static and final

can you instantiate an instance of an interface class?

no

with interfaces, all fields are automatically:

public, static, final

You can extend only
___ class, whereas
you can implement
______
interfaces

only one class, any number of interfaces

when to use abstract class?

share code between closely related classes

want to declare non static or non final fields

require other access modifiers besides public

Wrapper classes provide a way to use _______ data types as ______

primitive, objects

T/F: Generic does not allow using primitive types

True

List interface includes operations for:

iteration, search, positional access, range-view

what is an Array List?

A resizable array implementation of a List interface