ComputerScience1

What are the cycles for Computer System Central Processing?

* Fetch
* Retrieves an Instruction from Main Memory
* Decode
* Determines what the instruction is
* Execute
* Carry out the instruction

Types of Hardware

* Secondary Storage Devices
* Main Memory (RAM)
* Central Processing Unit (CPU)
* Input and Output Devices

Portable

________ is a program that can be written on one type of computer and then run on a wide variety of computers, with little or no modification

What does CPU stand for

Central Processing Unit

Types of Software

Applications

Operating Systems

Javac

________ translates Java source file into a file that contains byte code instructions.

console window

A(n) ________ that starts a java application is a: Standard output device.

operator system

A(n) ________ manages communication between software and hardware.

source code

A(n) ________ is the Java programming statements for the program.

Identifiers are programmer-defined names for

class

variable

method

Double value

________ is not compatible with a float bc of its size and precession.

JVM

________ is often called an interpreter.

Identifers

________ are programer- defined names for.

Println

________: places a newline character at the end of whatever is bring printed.

Application

________ enables you to perform a specific task.

Binary numbers

________ are 1 and 0.

compiler program

A(n) ________ translates the source code into an executable for.

R

________: carriage return- causes the cursor to go to the beginning of the current line, not the next line.

" "

Encloses a string of character such as a message that can be printed in the screen

A console window that starts a java application is a

Standard output device

Println

places a newline character at the end of whatever is bring printed

/n

newlines-advances curser to the new line for subsequent printing

/

single quote causes a single quotion mark to be printed

\\t

tab- causes cursor to skip over to the next tab stop

\\b

backspace- causes cursor to back up of move left one position

\\r

carriage return- causes the cursor to go to the beginning of the current line, not the next line

\\’

single quote causes a single quotation mark to be printed

\\”

causes the double quotation mark to be printed

\\\\

causes a blackslash to be printed

System.out.print("I love cheese

/n");

System.out.println("The value is

"+ value);

Smallest positive number

00000000

largest positive number

01111111

Smallest negative number

11111111

Largest negative number

1000000

What are the Major Programming languages divided into these three groups?

1. Machine
2. Assembly
3. High Level Language

Java Virtual Machine

Test editor→Source Code (filename.java) →Java Compiler →Bytecodes (classname.class) → Java virtual machine (java interpreter) →operating system

Coding the integer 5

with the class variable

print: The value is

public class Variable

{

public static void main(String\[\] args)

{

int value;

value = 5;

System.out.println(“The value is “ + value);

}

}

byte

1 byte

short

2 byte

int

4 byte

long

8 byte

float

4 byte

double

8 byte

Floating point literals

double value is not compatible with a float bc of its size and precession

* but it can be forced into a float
* number = 23.5F; // Works