UML

Question 1

What is UML?

Answer 1

unified modeling language

Question 2

what is identity?

Answer 2

a property of an object that distinguishes it from other objects

Question 3

what is state?

Answer 3

describes the data stored in the object

Question 4

what is behaviour

Answer 4

describes the operations the object carries out

Question 5

what is class

Answer 5

collection of objects which are similar

Question 6

what is encapsulation

Answer 6

wrapping of data and functions into a single unit.

data is not directly accessible to outside world

Only the operations or functions or methods wrapped in the class can access it

Question 7

what is abstraction

Answer 7

Abstraction is the act of representing the essential features without including the background details or explanations. This is a fundamental principle of modeling.

So abstraction is looking only at the information that is relevant at the time by hiding details so that there is no confusion in understanding the system

Question 8

what is inheritance

Answer 8

The process by which objects of one class acquire the properties of objects of another class is known as inheritance.

Question 9

what is sub class and super class

Answer 9

A class known as the subclass or the child class can inherit attributes and operations from another class known as the superclass or the parent class.

Question 10

what is polymorphism

Answer 10

Polymorphism means the ability to take more than one form.

Question 11

what are types of polymorphism

Answer 11

function polymorphism
operator polymorphism

Question 12

what is function polymorphism

Answer 12

An operation may exhibit different behavior in different instances depending upon the data used in the operation.

Question 13

what is operator polymorphism

Answer 13

This is the process of making an operator to exhibit different behaviors in different instances.

Question 14

give example of identity

Answer 14

yourCar and myCar

Question 15

example of state

Answer 15

the brand name as Tata, the model name as Nano, the color as yellow for myCar and the brand name Hyundai, the model name as i10, the color as red for yourCar

Question 16

what are building blocks of UML

Answer 16

things
relationships
diagrams

Question 17

what are things

Answer 17

anything that is a real world entity

Question 18

what are four types of things

Answer 18

structural behavioral grouping annotational

Question 19

what are annotational things

Answer 19

captures remarks, descrp and comments of UML elements

Question 20

what comes under annotational things

Answer 20

note

Question 21

what are grouping things

Answer 21

package - binds together the elements of UML

Question 22

what are behavioral things

Answer 22

depicts the behaviour of the system

Question 23

what comes under behavioral things

Answer 23

state machine
interaction

Question 24

what are structural things

Answer 24

depicts the static behavior of a model

Question 25

what comes under structural things

Answer 25

class object interface collaboration use case actor component node

Question 26

what is the diff btw class and obj in UML

Answer 26

The notation of the object is similar to that of the class; the only difference is that the object name is always underlined

Question 27

what are relationships

Answer 27

meaningful connection between things

Question 28

what are types of relationships

Answer 28

dependency association generalization realization

Question 29

what is realization

Answer 29

where one defines the behavior to be carried out, and the other one implements the mentioned behavior.

Question 30

what is generalization

Answer 30

relationship between a general thing (a parent class or superclass) and a specific kind of that thing (a child class or subclass).

Question 31

what is association

Answer 31

It tells how many elements are actually taking part in forming that relationship.

Question 32

what is dependency

Answer 32

It depicts the dependency from one entity to another.

Question 33

what are types of diagrams

Answer 33

structural behavioral interaction

Question 34

what is behavioral diagram

Answer 34

It depicts the behavioral features of a system

Question 35

which diagram comes under behavioral diagram

Answer 35

activity use case

Question 36

what is interaction diagram

Answer 36

It depicts the interaction between two objects and the data flow between them. Following are the several interaction diagrams in UML:

Question 37

which diagram comes under interaction diagram

Answer 37

seq

Question 38

what is structural diagram

Answer 38

It represents the static view of a system

Question 39

which diagram comes under structural diagram

Answer 39

class

Question 40

what are the types of relationship between use cases

Answer 40

include extend