Or by searching up the desired content and or information on a search engine. I believe.
Answer:A)Smart-card PINs
Explanation: A pin is the defines as the personal identification number that is allotted to the smart card uniquely that is no other smart can have same number.This number is only known by the smart card holder only.
This number is important because it works for the unlocking of the data that is securely stored and by entering the pin ,it can be decoded.Thus, the other given options are incorrect because they don't use enumeration to hide the data .Thus the correct option is option (A)
Answer:
- Inheritance
- Data abstraction or Data encapsulation
- Polymorphism.
Explanation:
The three fundamental features of an object oriented programming language are written above.
1. Inheritance:It is the mechanism when a class acquires the properties of some other class.The class which acquires the properties is called the child class and the class from which properties are inherited is called the base class.
2. Data encapsulation is clubbing different types of data in one place.That what class does .It can contain different data types in one place and those variables can be public ,private or protected.
3.Polymorphism it the property when an entity is processed in more than one form.Either be it run time or compile time polymorphism .
Answer:
Data is stored in tables, where each row is an item in a collection, and each column represents a particular attribute of the items. Well-designed relational databases conventionally follow third normal form (3NF), in which no data is duplicated in the system. ... With a homogenous data set, it is highly space efficient
