AS Level - Chapter 1: Information representation and multimedia

base two number system based on the values 0 and 1 only.

• Binary
• Denary
• Hexadecimal
• Bytes

abbreviation for binary digit.

• Bit
• Binary
• Hex
• 1&0

each binary digit in a number is reversed to allow both negative and positive numbers to be represented.

• One’s complement
• Two’s complement
• Binary
• Sign and magnitude

each binary digit is reversed and 1 is added in right-most position to produce another method of representing positive and negative numbers.

• Two’s complement
• One’s complement
• Bit
• Binary

binary number system where left-most bit is used to represent the sign (0 = + and); the remaining bits represent the binary value.

• Sign and magnitude
• Two’s complement
• One’s complement
• Bit

a number system based on the value 16 (uses the denary digits 0 to 9 and the letters A to F).

• Hexadecimal
• Binary
• Sign and magnitude
• Two’s complement

contents of a computer memory output to screen or printer.

• Memory dump
• Display
• Trash
• Monitor

number system that uses 4 bits to represent each denary digit.

• Binary-coded decimal (BCD)
• One’s complement
• Two’s complement
• Sign and magnitude

coding system for all the characters on a keyboard and control codes.

• ASCII code
• Binary-coded decimal (BCD)
• Memory dump
• Hexadecimal

a list of characters that have been defined by computer hardware and software. It is necessary to have a method of coding, so that the computer can understand human characters.

• Character set
• ASCII code
• Binary-coded decimal (BCD)
• Memory dump