Intro to OOP

Question 1

Class that doesn’t require instantiation

Answer 1

Static Class

Question 2

Showing only the necessary features of an object and hiding what’s complex

Answer 2

Abstraction

Question 3

Also known as “structured programming”

Answer 3

Procedure-Oriented Programming (POP)

Question 4

Ability of different objects to respond (in different ways) to the same functions.

Answer 4

Polymorphism

Question 5

They store data that can be manipulated by methods

Answer 5

Attributes

Question 6

Where one class can inherit properties of another class.

Answer 6

Inheritance

Question 7

(T or F) “args” in the main method cannot be renamed

Answer 7

False

Question 8

No modifier; the member can only be accessed within its own package, and a subclass

Answer 8

protected

Question 9

Class that should be instantiated

Answer 9

Non-static Class

Question 10

Other terms for “Sub Class”

Answer 10

Derived Class, Descendant Class, Child Class

Question 11

(Procedural or OOP) functions can be reused; more effort to manage data.

Answer 11

Procedural

Question 12

Allows groups of classes to be available only when needed.

Answer 12

Packages

Question 13

This has attributes and behaviors

Answer 13

Object

Question 14

Eliminates potential conflicts of similarly-named classes.

Answer 14

Packages

Question 15

An object used for sending output to the screen

Answer 15

System.out

Question 16

Any variable declared in a class, but outside a method, constructor, or block

Answer 16

Instance variable

Question 17

This modifier specifies that the member can only be accessed in its own package

Answer 17

package-private

Question 18

What are the access modifiers in Java?

Answer 18

public, protected, package-private, private

Question 19

Allows devs to create GUI

Answer 19

Swing Programming

Question 20

Helps with understanding part of a system (code) without having to understand the entire thing.

Answer 20

Modularity

Question 21

(Procedural or OOP) understanding of the program becomes complex as it grows.

Answer 21

Procedural

Question 22

Everything enclosed between braces; contains the method’s code

Answer 22

Method body

Question 23

What is the syntax used to read user input using the BufferedReader class?

Answer 23

BufferedReader objectName = new BufferedReader(new InputStreamReader(System.in));

Question 24

(T or F) when printing, you must import the java.io.* package

Answer 24

False

Question 25

This keyword allows other methods in the code to access it

Answer 25

public

Question 26

Bundling attributes and methods within one unit.

Answer 26

Encapsulation

Question 27

An empty method

Answer 27

Abstract Method

Question 28

The program is designed as a sequence of procedures, where each one performs a task.

Answer 28

Procedure-Oriented Programming (POP)

Question 29

A comma-delimited list of input parameters, preceded by their data types and enclosed by parentheses

Answer 29

Parameter list

Question 30

This method belongs to a class rather than any object instance; they don't modify object attributes and can be called on the class itself.

Answer 30

Static Method

Question 31

When is abstract used?

Answer 31

When a method does not have a body

Question 32

Other terms for "Super Class"

Answer 32

Base Class, Ancestor Class, Parent Class

Question 33

This keyword means that no value will be returned

Answer 33

void

Question 34

A process of creating objects of the class

Answer 34

Instantiation

Question 36

In what class is the read() and readLine() method found?

Answer 36

BufferedReader Class

Question 37

Special method used to initialize an object's attributes when it's created.

Answer 37

Constructor

Question 38

When is final used?

Answer 38

When a method is not allowed to be overridden by a subclass

Question 39

This keyword means that the Java VM will automatically execute the method

Answer 39

static

Question 40

Any field declared with the static modifier; tells compiler that there is exactly 1 copy of this variable

Answer 40

Static variable/Class variable

Question 41

You can use certain programs repeatedly; flexible.

Answer 41

Reusability

Question 42

Foundation from which individual objects are created

Answer 42

Class

Question 43

The current value of an object's attributes at any given time.

Answer 43

State

Question 44

Term used to refer to the item/s inside the parenthesis

Answer 44

Arguments

Question 45

(T or F) public static can be written as static public

Answer 45

True

Question 46

This can change as the object interacts with methods or other objects.

Answer 46

State

Question 47

This is the default name of the method in every class; the entry point for your application.

Answer 47

main

Question 48

This is used to read user input from the java.util package

Answer 48

Scanner Class

Question 49

Blueprint for creating objects

Answer 49

Class

Question 50

This modifier allows the method to be visible to all classes

Answer 50

public

Question 51

In what package are the class libraries in Java contained?

Answer 51

Java

Question 52

This can have unique values for its attributes even if they're within the same class

Answer 52

Object

Question 53

Functions defined within a class that specify the behavior of objects; they perform actions and manipulate data

Answer 53

Method

Question 54

Used to define a common set of methods that various classes can implement based on their needs.

Answer 54

Interfaces

Question 55

(Procedural or OOP) can be reused and extended; you can create classes based on existing ones.

Answer 55

OOP

Question 56

This is an object that is static and publicly available inside a class; it represents a standard output and is an instance of the java.io.PrintStream class

Answer 56

out

Question 57

Programming method that uses objects as the building blocks of software dev.

Answer 57

OOP

Question 58

This modifier specifies that the method can only be accessed within its class

Answer 58

private

Question 59

How do you use classes from other packages?

Answer 59

Explicitly refer to them by their package name, or import them on your source file.

Question 60

Programming that focuses on organizing a program into a set of functions/procedures.

Answer 60

Procedure-Oriented Programming (POP)

Question 61

Variables within a class that represent the state of objects created from the class

Answer 61

Attributes

Question 62

What is the syntax for instantiating an object?

Answer 62

ClassName objectName = new ClassName();

Question 63

A method of the java.io.PrintStream that allows you to output text

Answer 63

print()

Question 64

Java programming method that uses "text-only" interface

Answer 64

Console Programming

Question 65

(Procedural or OOP) easier to maintain code with the help of encapsulation and modularity.

Answer 65

OOP

Question 66

By default, what package do Java classes have access to?

Answer 66

java.lang

Question 67

Any variable or method that is non-static

Answer 67

Instance variable

Question 68

Defines the structure and behavior that the objects will have

Answer 68

Class

Question 69

What are the naming rules for a method name?

Answer 69

a) Should be lowercase, b) Multi-word beginning with a verb (lowercase), followed by adjectives (capital)

Question 70

A class that lets you manipulate OS-related objects; a part of java.lang

Answer 70

System

Question 71

Requires an object of its class to be created before it can be used

Answer 71

Instance variable

Question 72

(Procedural or OOP) data and functions are separate; functions operate on global or passed data.

Answer 72

Procedural

Question 73

An instance of a class

Answer 73

Object

Question 74

Indicates that the method might throw one of the listed exception types

Answer 74

Optional exception list

Question 75

What type of method operates on an instance of a class?

Answer 75

Instance Method

Question 76

This keyword means that the arguments of "main" should be strings

Answer 76

String args

Question 77

They represent real-world entities with attributes and behaviors.

Answer 77

Objects

Question 78

(Procedural or OOP) data and functions are encapsulated within objects

Answer 78

OOP

Question 79

Data type of the value returned by the method

Answer 79

Return type

Question 80

An action done by an object

Answer 80

Method

Question 81

Way of grouping related classes and interfaces in a structured way.

Answer 81

Packages

Question 82

Also known as "fields" or "properties"

Answer 82

Attributes

Question 83

Collection of methods that indicate that a class has some behavior besides what it inherits from the parent class.

Answer 83

Interfaces

Question 84

This is used to read user input from the java.io package

Answer 84

BufferedReader Class

Question 85

Specifies whether other classes can use a particular field or invoke a particular method

Answer 85

Access Modifier