Give 3 historical computer events with date define differenc

Give 3 historical computer events with date define difference between hardware and software How do we use Abstraction why do we use a binary number system what is a hex base number system Convert binary 01101110 to decimal Is an auto horn in the street analog or digital? what concepts do we use to convert analog sound to digital sound? Show examples of real numbers

Solution

1 ans)Hardware:

it is a physical part of a system like for example mouse monitor cpu etc.it is tangable .so it can be touch and feel

Software:

it is logical part of system or we can say software is a collection of prominng code which can be executed by a cpu and provides a results on monitor or make hardware to perform actions.

2 ans)Abstraction :

abstraction in java is to hide the implimentation. and makes you visible only needed part to you.which means abstraction in java is to achive security and abstraction can be done by using interface and abstract classes.where these are not concrete classe so this are comom for all derived classes and interface and abstract classes to be implemented in subclass

3 ans)hexabase number system is also calles as hex it contains of 16 symbols.hexabase number sytem uses decimals with 6 extra symbols.these symobls are english leters like A,B etc

4 ans)01101110 to decimal

0=2^0=>0

1=2^1=>1

1=2^2=>4
1=2^3=>8
0=2^4=>0
1=2^5=>32
1=2^6=>64
0=2^7=>0

ans===109

5 ans)anolog signal but everything is converted to digital

6 ans)in order to convert anlog to digital we use a cocept called anolog to digital convertor..anolog to digital convertor is a system is used to convert anolog signal like digital camera to digiatal signal

7 ans)Real numbers is a values represents the quantity along the line real numbers include rational numbers and irrational numbers

rational numbers examples:2,-2 etc

irrational numbers examples :root4,root5 etc