Preference share are those who fulfill two conditions:-
1.it has preferential right of dividend.
2.it has preferential right in regard to payment at the time of winding up of company.
And
debentures are called acknowledgement of debt.
example:-
(your id address which you created like:-abc)/(site in which created a account like:-yahoo,gmail,etc)/at last .com
1.central bank issues currency.
2. It act as government banker.
3.it formulate policies.
4.it is a lender as a last resort.
5.regulate credit system.
6.oversee commercial banks.
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1. They teach you with different and shortcut method that make study easier.
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ABSTRACTION : Abstraction refers to act of representing essential features without including the background details or explanations. Classes use the concept of abstracting and or defined as a list of abstract attributes such as size ,weight and cost and functions to operate on those attributes.
ENCAPSULATION : Binding data and function into single class type variable called encapsulation.
STANDARD DEVIATION IS DEFINED AS THE SQUARE ROOT OF THE MEAN OF SQUARE
OF DEVIATIONS FROM ARITHMETIC MEAN .IT IS REPRESENTED BY A SYMBOL σ .
we calculate standard deviation by direct method and short cut method and step deviation method