CAS CS 101- Final Exam Guide - Comprehensive Notes for the exam ( 40 pages long!)
29 Mar 2018
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In binary addition, the computer converts the decimal numbers we input into binary when it needs to store or work on data. It"s easier to remember and work with the hex value: each digit represents one nibble, you"ll often see a hex value as wither 0x or 0h and the number, ex. Write the 4-bit binary value for each digit. Ascii american standard code for information interchange: letter mapping scheme, each 7-bit ascii code maps to one character, ex. A is stored as 110 0001: ascii stores values in 7 bits. It can store 128 different characters: many non-english languages have more symbols than that, unicode is labelled by the width that they use, utf-8 uses 8 bit character, utf-16 uses 16 bit characters, utf-32 uses 32 bit characters. Conversions: taking a thing you want to save and converting it to binary, analog-to-digital conversion (a/d, typically, an electronic chip will do the conversion.
