PCEP Entry Certification

Program

Direction that make computers usable.

What do programs do?

Provide directions for computers to complete executions.

Programs create:

Languages

Machine Language

A simple language that machines run on.

Where is machine language executed?

Directly on computer hardware.

Machine Code

It is a compilation of machine language.

Instruction List

A complete set of known commands.

IL

Instruction list.

Natural Languages

Languages that develop naturally.

Machine languages are:

Developed by humans.

Alphabet

Symbols to build words.

Lexis

A dictionary to show the words offered to users.

Syntax

Rules to determine strings of words.

Semanties

Rules that determine phrases that make sense.

High-Level Languages

Solution for the need of a common language between humans and computers.

Source Code

A program written in a high-level programming language.

Source File

The file that contains the source code.

Alphabetically

Must be written in a recognizable script.

Lexically

Each language has a dictionary to master.

Syntactically

Each language has rules that must be obeyed.

Semantically

It must make sense.

Compilation

Source program is translated once through a file containing machine code.

Interpretation

You translate the source program each time it needs to be run.

Source code cannot be distributed through:

Interpretation.

Computer File

A computer program that is a piece of text.

Pure Text

Text with no fonts, colors, or images. Bare bones text.

Computer file text must be:

Pure text.

Error Message

Occurs if the interpreter detects an error in subsequent lines.

Compilation Advantages

Faster execution, user needs complier but end-user does not, programming tricks are secured.

Compilation Disadvantages

A time consuming process, you must have compliers for every platform you wish the code to be used on.

Interpretation Advantage

The code can run as soon as completed, can be stored as a programming language.

Interpretation Disadvantage

The code will be slower based on computer, you and the user will need the same interpreter.

Python is an:

Interpreted language.

Script Languages

Interpreter languages with encoded scripts.