Unit 1

Question 1

JDK

Answer 1

Java Development Toolkit

Question 2

JRE

Answer 2

Java Runtime Environment

Question 3

IDE

Answer 3

Integrated Development Environment

Question 4

public class Welcome

Answer 4

words “public class” are reserved words in Java

Question 5

Naming conventions

Answer 5

Name of a Java class starts with a capital letter, using CamelCase convention

Question 6

hardware

Answer 6

physical parts of the computer

Question 7

software

Answer 7

instructions that control the hardware and allows the computer to perform tasks

Question 8

bus

Answer 8

a computer’s components that are interconnected by a subsystem

Question 9

storage devices

Answer 9

disks, CDs, tape

Question 10

input devices

Answer 10

keyboard and mouse

Question 11

output devices

Answer 11

monitor, printer

Question 12

CPU

Answer 12

Central Processing Unit, brain of the computer. Retrieves instructions from memory and executes them.

Question 13

CPU Speed

Answer 13

Megahertz, (MHz)

Question 14

memory

Answer 14

used to store data and instructions for the CPU to execute

Question 15

bit

Answer 15

binary digit (base 2), stores values 0 or 1

Question 16

byte

Answer 16

minimum storage unit

Question 17

ASCII

Answer 17

encoding/decoding schema done by system

Question 18

Volatile memory

Answer 18

information is lost when the power is off (RAM)

Question 19

resolution

Answer 19

specifies number of pixels in horizontal and vertical dimensions of the display device. Higher the resolution, the sharper and clearer the image is.

Question 20

dot pitch

Answer 20

amount of space between pixels, measured in millimeters. Smaller the dot pitch, sharper the quality.

Question 21

communication device

Answer 21

device capable of transmitting a signal over the telephone, other communication wire, or wireless (modems, DSL, wireless adapters)

Question 22

systems software

Answer 22

operating systems (Windows, MacOS X, Linux)

Question 23

machine language

Answer 23

set of primitive instructions built into every computer

Question 24

Assembly

Answer 24

assemblers are used to convert assembly language programs into machine code

Question 25

high-level language

Answer 25

English-like and easier to learn

Question 26

source code

Answer 26

a program written in a high-level language

Question 27

interpreter

Answer 27

reads one statement at a time from the source code, translates it to the machine code and then executes it right away

Question 28

compiler

Answer 28

translates the entire source code into a machine-code file, and the machine-code file can then executed

Question 29

operating system (OS)

Answer 29

a program that manages and controls a computer’s activities.

Question 30

keywords / reserved words

Answer 30

words that have special meanings in programming, and cannot be used as a name

Question 31

methods

Answer 31

logical parts of a program which runs (Java uses the method main() for it)

Question 32

syntax

Answer 32

rules to how a language is written (think of it like grammar)

Question 33

statement terminator

Answer 33

semicolon ;

Question 34

documentation

Answer 34

comments that are written into code that makes it easier to understand what is going on

Question 35

syntax errors / compiler errors

Answer 35

results from writing code incorrectly and is caught by the compiler

Question 36

runtime error

Answer 36

happens while the program is running or live, then the program halts

Question 37

logic errors

Answer 37

the program runs with unintended results or consequences