PPL| OOP in PHP

OOP IN PHP

Viva Vice on OOP in PHP

Q1. What is OOPS?
OOPS is abbreviated as Object Oriented Programming system in which programs are considered as a collection of objects. Each object is nothing but an instance of a class.

Q2. Write basic concepts of OOPS?
Classes.
Objects.
Abstraction.
Encapsulation.
Inheritance.
Polymorphism.

Q3. What is a class?
A class is simply a representation of a type of object. It is the blueprint/ plan/ template that describe the details of an object.

Q4. What is an object?
Object is termed as an instance of a class, and it has its own state, behavior and identity.

Q5. What is Encapsulation?
Wrapping up member variables and methods together into a single unit (i.e. Class) is called Encapsulation.

Q6. What is Polymorphism?
It is simply "One thing, can use in different forms"
or example, One car (class) can extend two classes (Honda & Hyundai)

Q7. . What is Inheritance?
Inheritance is a concept where one class shares the structure and behavior defined in another class.

Q8. Which version of PHP supports OOPs concepts? 
PHP5

Q9. Write the syntax of declaring Class in PHP?
<?php  
class ClassName  
    {  
        // Class properties and methods   
    }  
?>  

Q10. Write the syntax Of declaring object in PHP?
$obj = new MyClass();

Q11. What Is Difference Between Class And Interface?
Interfaces do not contain business logic 
You must extend interface to use.
You can't create object of interface.

Q12. What Is Static Keyword In Php?
If we declare a Method or Class Property as static, then we can access that without use of instantiation of the class. Static Method are faster than Normal method.

Q13. What Is Object Iteration?
PHP provides a way for objects to be iterate through a list of items, for this we can use foreach. Only visible properties will be listed. 

Q14. Difference between class and an object?
An object is an instance of a class. Objects hold any information , but classes don’t have any information. Definition of properties and functions can be done at class and can be used by the object.
Class can have sub-classes, and an object doesn’t have sub-objects.

Q15. What is the difference between structure and a class?
A structure is used for grouping data whereas class can be used for grouping data and methods. Structures are exclusively used for data and it doesn’t require strict validation , but classes are used to encapsulates and inherit data which requires strict validation.

Q16. What are the advantages of object oriented programming?
Code Reusability: it can be achieved through inheritance and traits.
Modularity: it can be achieved through breaking large code into small modules, Modularity reduces complexity.
Flexibility: it can be achieved through polymorphism.
Maintainability: it is to maintain code which follows Object Oriented Programming Concepts.
Security: it can be achieved through Encapsulation.
Testability: it is easy to test.

Principles of Programming Languages

EasyExamNotes.com covered following topics in PPL.

Practicals:
Previous years solved papers:
A list of Video lectures
References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

Python Programming ↓ 👆
Java Programming ↓ 👆
JAVA EasyExamNotes.com covered following topics in these notes.
JAVA Programs
Principles of Programming Languages ↓ 👆
Principles of Programming Languages
EasyExamNotes.com covered following topics in these notes.

Practicals:
Previous years solved papers:
A list of Video lectures References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

    Computer Organization and Architecture ↓ 👆

    Computer Organization and Architecture 

    EasyExamNotes.com covered following topics in these notes.

    1. Structure of desktop computers
    2. Logic gates
    3. Register organization
    4. Bus structure
    5. Addressing modes
    6. Register transfer language
    7. Direct mapping numericals
    8. Register in Assembly Language Programming
    9. Arrays in Assembly Language Programming

    References:

    1. William stalling ,“Computer Architecture and Organization” PHI
    2. Morris Mano , “Computer System Organization ”PHI

    Computer Network ↓ 👆
    Computer Network

    EasyExamNotes.com covered following topics in these notes.
    1. Data Link Layer
    2. Framing
    3. Byte count framing method
    4. Flag bytes with byte stuffing framing method
    5. Flag bits with bit stuffing framing method
    6. Physical layer coding violations framing method
    7. Error control in data link layer
    8. Stop and Wait scheme
    9. Sliding Window Protocol
    10. One bit sliding window protocol
    11. A protocol Using Go-Back-N
    12. Selective repeat protocol
    13. Application layer
    References:
    1. Andrew S. Tanenbaum, David J. Wetherall, “Computer Networks” Pearson Education.
    2. Douglas E Comer, “Internetworking with TCP/IP Principles, Protocols, And Architecture",Pearson Education
    3. KavehPahlavan, Prashant Krishnamurthy, “Networking Fundamentals”, Wiley Publication.
    4. Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill.