Q. What is mutable object and immutable object?

A. If a object value is changeable then we can call it as Mutable object. (Ex., String Buffer, If you are not allowed to change the value of an object, it is immutable object. (Ex., String, Integer, Float, -)

• immutable object : if once object is created we can't change value of attributes.
  mutable : if object created we can change value of attribute..
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