CPE PROG 2 PART 1 EXAM

• Computer system = combination of all the

  components required to

  process and store data

  using a computer.
• Hardware= physical aspects of a computer

  system

  • They are tangible, i.e. you can

  see and touch them.
• Software = anything that tells hardware

  what to do and how to do it. Computer instructions.
• Input = Data items enter the computer system and are put into memory, where they can be processed
• Processing= data is collected and translated into usable information (organizing

  /sorting,checking for accuracy, or

  performing calculations)
• Output = after data items have been process, displaying on the console
• Programming = process of writing instructions to facilitate specific actions in

  a computer
• Programming language =is a vocabulary and set of

  grammatical rules for

  instructing a computer or

  computing device to perform

  specific tasks
• Source code = the program statements you write in a programming language
• Syntax = refers to the spelling and grammar
• Syntax error = mistakes such as spelling and punctuation errors, incorrect labels, and so on
• Logical error = mistakes that cause the program to operate incorrectly
• Machine language = Binary language • lowest-level programming language(series of 1s and 0s) • only language understood by computers
• Compiler = translates your source code into machine language • also checks for errors
• Object code = the translated machine

  language statements
• Pseudocode = English-like representation

  of the logical steps it takes

  to solve a problem

  Written in natural

  language and

  mathematical notations
• Flowchart = Pictorial representation of

  the logical steps it takes to

  solve a problem
• 1990s = when was Python created? By Guido Van Rossum
• Python was created at = Nether lands
• IDE = provides the user

  interface for code

  development, testing

  and debugging

  features.

  This
• Compiler = special program that

  translates a programming

  language's source code into

  machine code, bytecode or

  another programming

  language
• indentation = is very important
• Variables = containers for storing data

  values for later use.
• Identifier = Is the name we give to identify the variable
• Data types = Types of data a variable

  can contain
• Output = Displaying values to the console. After the data items have been processed
• Input = Accepts keyboard input

  Returns a string, Data items
• Type casting = Specifying the type of a variable

  Changing type
• String concatenation= adding strings together

  • + Operator
• Value = we assign to the variable
• Elements of a computer system = People, Data, Procedures, Connectivity
• What are the data types =

  String, Integer, Float, Boolean