Number System: The symbol which is used to measure quantity/ count the specific value that is number system.
1. Binary number system:
➤ A number system that uses two different symbols (0,1) to measure quantity.
➤ It's base is 2
➤ Total number (0,1), used by computer
➤ It is also called machine language.
2. Octal number system:
➤ It is used Eight different number (0,1,2,3,4,5,6,7), base is 8
3. Decimal number system:
➤ Use 10 distinct symbols (0,1,2,3,4,5,6,7,8,9), base is 10
4. Hexadecimal number system:
➤ The number which include number and alphabet both.
➤ It is used 0-9, and A-F symbol,16 symbols, (0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F)
Logic Gate:
➤ Logic gate are the basic building block of any digital system.
➤ Electronic circuit has more than one input and only output.
➤ It is used in CPU (ALU)
Types of logic gates:
1. OR gate: It take two or more input and give one output and produce false result when all input are false otherwise result always true. A+B=AB, (0+0=0, 0+1=1, 1+0=1, 1+1=1).
2. AND gate:
➤ Take more input and produce one output.
➤ It works the multiply function .e.g. A*B=C, (0*0=0, 0*1=0, 1*0=0, 1*1=1)
3. NOT gate:
➤ The not gate is circuit that work as inverter.
➤ It has one input signal.
➤ input/output (0=1,1=0).
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