chapter 1

Question 1

What is Computer Program

Answer 1

Set of instructions that tell pc what to do

Question 2

What is machience language

Answer 2

most basic circutry level language

low level programming language

Question 3

What is high level language

Answer 3

programming language with reasonable vocab and terms

Question 4

What is syntax

Answer 4

A specific set of rules for the language

Question 5

program statement

Answer 5

Similar to English sentences

Commands to carry out program tasks

Question 6

Compiler or interpreter

Answer 6

Translates language statements into machine code

Question 7

Syntax error

Answer 7

Misuse of language rules

A misspelled programming language word

Question 8

Debugging

Answer 8

Freeing program of all errors

Question 9

Logic errors

Answer 9

Also called semantic errors
Incorrect order or procedure
The program may run but provide inaccurate output

Question 10

Procedural programming

Answer 10

Sets of operations executed in sequence

Question 11

Variables

Answer 11

Named computer memory locations that hold values

Question 12

Procedures

Answer 12

Individual operations grouped into logical units

Question 13

Object-oriented programs

Answer 13

Create classes
-Blueprints for an object
Create objects from classes
Create applications

Question 14

what applications is object oriented programming most used for

Answer 14

Computer simulations
Graphical user interfaces (GUIs)
-Not all object-oriented programs are written to use a GUI

Question 15

what differs object oriented programming from traditional procedural programming

Answer 15

Polymorphism
Inheritance
Encapsulation

Question 16

Class

Answer 16

Describes objects with common properties
A definition
An instance

Question 17

Attributes

Answer 17

Characteristics that define an object
Differentiate objects of the same class
The value of attributes is an object’s state

Question 18

Objects

Answer 18

Specific, concrete instances of a class

Question 19

Method

Answer 19

A self-contained block of program code that carries out an action
Similar to a procedure

Question 20

Encapsulation

Answer 20

Conceals internal values and methods from outside sources
Provides security
Keeps data and methods safe from inadvertent changes

Question 21

Inheritance

Answer 21

An important feature of object-oriented programs
Classes share attributes and methods of existing classes but with more specific features
Helps you understand real-world objects

Question 22

Polymorphism

Answer 22

Means “many forms”

Allows the same word to be interpreted correctly in different situations based on context

Question 23

Java

Answer 23

Developed by Sun Microsystems
An object-oriented language
General-purpose
Advantages
-Security features
-Architecturally neutral
-Can be run on a wide variety of computers
-Does not execute instructions on the computer directly
-Runs on a hypothetical computer known as a Java Virtual Machine (JVM)

Question 24

Source code

Answer 24

Programming statements written in high-level programming language

Question 25

Development environment

Answer 25

A set of tools used to write programs

Question 26

Bytecode

Answer 26

Statements saved in a file | A binary program into which the Java compiler converts source code

Question 27

Java interpreter

Answer 27

Checks bytecode and communicates with the operating system | Executes bytecode instructions line by line within the Java Virtual Machine

Question 28

WORA

Answer 28

Write once, run anywhere

Question 29

Console applications

Answer 29

Support character output

Question 30

Windowed applications

Answer 30

Menus Toolbars Dialog boxes

Question 31

Literal string

Answer 31

Will appear in output exactly as entered | Written between double quotation marks

Question 32

Arguments

Answer 32

Pieces of information passed to a method

Question 33

Method

Answer 33

Requires information to perform its task

Question 34

System class

Answer 34

Refers to the standard output device for a system

Question 35

What are the requirments for class identifiers

Answer 35

Must begin with one of the following: - Letter of the English alphabet - Non-English letter (such as α or π) - Underscore - Dollar sign - Cannot be a digit - Cant be a reserved Java word - cannot be true, false or null

Question 36

Upper Camel casing (Pascal casing)

Answer 36

Each word of an identifier begins with uppercase letter - UnderGradStudent - InventoryItem

Question 37

Access specifier

Answer 37

Defines how a class can be accessed

Question 38

static

Answer 38

- A reserved keyword | - Means the method is accessible and usable even though no objects of the class exist

Question 39

void

Answer 39

- Use in the main() method header - Does not indicate the main() method is empty - Indicates the main() method does not return a value when called - Does not mean that main() doesn’t produce output

Question 40

how does a java class need to be saved

Answer 40

- Save the class in a file with exactly the same name and .java extension - For public classes, class name and filename must match exactly

Question 41

compiling a java class

Answer 41

Compile the source code into bytecode Translate the bytecode into executable statements Using a Java interpreter Type javac First.java

Question 42

Parsing

Answer 42

Compiler divides source code into meaningful portions

Question 43

Logic error

Answer 43

The syntax is correct but incorrect results were produced when executed

Question 44

Run-time error

Answer 44

Not detected until execution | Often difficult to find and resolve

Question 45

comments

Answer 45

non executed statements used for documenting a program or for notes to yourself and or others Should include author, date, class' name and its function

Question 46

Java API

Answer 46

``` Also called the Java class library Provides prewritten information about Java classes ```