Must Know Vocab For Pop Quiz

Question 1

Array

Answer 1

Lists stored into a variable
Values of the same type
Can be accessed by index integer

Question 2

Actual arguments

Answer 2

Expression

Supplied for a formal parameter of method by the caller

Question 3

API

Answer 3

Application programming interface

Code library for building programs

Question 4

Bit

Answer 4

Binary digit
Smallest unit of info
1 or 0

Question 5

Block

Answer 5

A group of statements bracketed by { }

Question 6

Blue J

Answer 6

Easy program for learning Java

For 1st year students

Question 7

Boolean type

Answer 7

A type with 2 values: either true or false

Question 8

Byte

Answer 8

Made up of 8 bits

Current computers use bytes as the smallest measure of storage

Question 9

Bytecode

Answer 9

Instructions made by compiler and then interpreted by JVM

Files end in .class

Question 10

Cast

Answer 10

Explicitly converting one type to another

Question 11

Char

Answer 11

Keyword

Variable = character

Question 12

Class

Answer 12

groups related fields and methods

Blueprint for making an object

Question 13

Comment

Answer 13

Helps humans understand what the heck is goin on

Question 14

Compiler

Answer 14

Source code — machine (object) code

Question 15

Compile-time error

Answer 15

Error detected when program is combined

Question 16

Constructor

Answer 16

Uses “new” method, automatically called and run when object is called
INITIALIZES

Question 17

CPU

Answer 17

Central Processing Unit

Executes the machine code

Question 18

Editor

Answer 18

Program used to write computer program

Question 19

Escape character

Answer 19

/n

Non literal meaning

Question 20

GUI

Answer 20

Graphical User Interphase

Graphics: windows, buttons, menus, pointing device, mouse, keyboard, user input

Question 21

Final variable

Answer 21

Set value

Question 22

Fields

Answer 22

Variables defined outside of all functions but inside of a class

Question 23

Formal parameters

Answer 23

Variables in the parenthesis of a function

Actual variables passed into formal variables

Question 24

Header

Answer 24

First line of function

Question 25

Interpreter

Answer 25

Source code — machine code

One line at a time

Question 26

IDE

Answer 26

Integrated Development Environment

Combines an editor, Java compiler, debugger, JVM

Question 27

Local variable

Answer 27

Defined inside of a function/ block

Limited scope

Question 28

Logic error

Answer 28

When the programmer fails

Question 29

Main

Answer 29

Starting function

Question 30

Objects

Answer 30

Something which we can interact with and manipulate in a program

Question 31

Object code

Answer 31

Machine code after compiled / interpreted

Question 32

OS

Answer 32

Operating System

Software that controls the execution of computer programs and may provide various services

Question 33

Order of operations

Answer 33

U should know this

Question 34

Package

Answer 34

Group of related classes

Question 35

Pseudocode

Answer 35

Half code half English

Ex: java.awt.Image

Question 36

Accessor method

Answer 36

Method,
returns data,
accesses object doesn’t change it
Ex: getX( )

Question 37

RAM

Answer 37

Random Access Memory

Electronic circuits that store codes and data needed to run program

Question 38

Random

Answer 38

” import java.util*; “

Random gen = new Random( );
int carrotSticks = gen.nextInt(15);

Or

int carrotStick = (int)(Math.random( )*15);

Question 39

Reserved words

Answer 39

Predefined, can’t be changed

Question 40

Run time error

Answer 40

Error only when program runs, not when it compiles

Ex: 1/x only has an error when x = 0

Question 41

Signature

Answer 41

The name of a method and the types of its parameters

Question 42

Semantics

Answer 42

Defined rules for interpreting the meaning of statements

Question 43

Source program

Answer 43

Program written in English, in Java files end in .java

Question 44

Variable

Answer 44

Memory location, referenced by an identifier

Question 45

Instance Variable

Answer 45

FIELD

• for that class
• made when an object is made

Question 46

Instance

Answer 46

• when you use the “new” operator to make an object

- an object is an instance of a class