Chapter 1 - Data Representation
No description yet. This curated deck is ready for daily study.
Card preview (24)
What is the building block of all computers and why
Binary number system, because it is only made up of 0’s and 1’s. Computers contain millions of tiny switches that must be in either the ON or OFF position. These positions can be represented by the binary number system. 1=ON(high) 0=OFF(low)
What do switches in a computer do and what is another name for them
Make use of logic gates and store and process data Microtransistors
Whaty does binary allow computers to do
Carry out calculations
What is a bit
A basic computing element that is either a 0 or 1, comes from BInary digiT
What is the binary number system
A number system based on 2, and only contains 0’s and 1’s
What is the denary system also called
A base 10 number system
What are the uses of the hexadecimal system (4)
Error codes Mac address IPv6 adress HTML colour codes
What are error codes
They are codes that are usually automatically generated, and refer to the memory location of the error
What does the MAC address stand for
Media Access Control address
What does NIC stand for
Network interface card
What is a MAC address
A number which uniquely identifies a device on a network, it refers to the NIC.
Why are MAC addresses rarely changed
So that a particular device can always be identified no matter where it is
What does the NN-NN-NN in a MAC address identify What does the DD-DD-DD in a MAC address identify
The number of the manufacturer The device serial number
What do IP addresses stand for
Internet protocol addresses
What is the difference between an IPv4 and an IPv6 (2)
32 vs 128 bit number. IPv6 uses a colon instead of a decimal point
What does HTML colour codes stand for
Hyper text markup language colour codes
What is the maximum denary value of an 8-bit binary number
255 (2^8-1)
What is it called when there is more than 8 bits generated after calculations and what does it mean
Over flow The number is too big to be stored in the computer using 8 bits A bigger register needs to be used
What is an overflow error
The result of carrying out a calculation where the result is too big for the computers word size.
hexadecimal
A number system based on 16, goes from 0-9 and then A-F
What is HTML
It is a mark-up (NOT PROGRAMMING) language used when writing and developing web pages It uses tags<> Often represents colours of text on screen
What is a logical shift
An operation that shifts buts left/right in a register and replaces shifted bits with 0 Left shift= multiply binary number by 2 Right shift=divide binary number by 2
What is the left most bit reffered to as
The most significant bit
ASCII
American Standard Code for Information Interchange It is a set of characters for each character on a standard keyboard and 32 control codes control code. (0-31 denary, 00-19 Hex) Was used in Communication and computer systems