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computer sci ch 1

vocab terms ch 1
STUDY
PLAY
program
contains source code, which tells computer what to do
programming
giving the computer instructions to achieve a task
java virtual machine
a cpu simulated by a program run on the cpu: a computer inside a computer
applet
web page containing java code
object- oriented
type of programming that focuses on data
procedural
type of programming that focuses on methods
CPU (central processing unit)
locates and executes program instructions, taking data from storage and sending data back
chip
integrated circuit, plastic or metal housing, metal connectors, inside wiring
transistor
controls electrical signals: an on/ off switch
storage
where data and programs are kept
RAM (primary storage)
storage made from memory chips, fast, but expensive and temporary (lost when power is off)
Hard Disk (secondary storage)
less expensive storage, permanent
network
connects computers to other computers and the internet
removable storage
includes floppy disks, tapes, and CDs- portable!
peripheral
devices required to interact with the human: include display, speakers, printers, keyboard, etc
Bus
electrical lines connecting CPU, RAM, and hard disk electronics
motherboard
contains cpu, ram, and connectors to peripheral devices
card slots
ex. graphics (monitor), sound (speakers), and network (internet)
ENIAC (electronic numerical integrator and computer)
first usable electronic computer, used vacuum tubes in place of transistors, programmed by connecting wires to panels
syntax error
violates rules of programming language, detected by compiler
logic error
causes program to run incorrectly, the programmer must detect and fix himself