Questions on OOP concepts
1. What are the access specifiers available in php ? Explain
2. What is object cloning ?
3. What are the differences between interface and abstract
class ?
4. What is overloading ?
5. What is overriding ?
6. How to prevent function overriding ?
7. What is the use of "final" keyword ?
8. What is static variable ? How will access a static
variable ? What is static class ?
Answer Posted / raghu
Answer according to question no
1. Three access specifiers:
public : can be accessed outside class by any child class
private : can be accessed by only members of class
protected : can be accessed in derived class having
protected methods or variables not by other
2. Making copy of object is nothing but object cloning
e.g. $copy_of_object = clone $object;
3.You neither able to create object of interface nor
abstract class. Difference: In abstract class, u can declare
as well as define methods but in interface u can not define
method u can only declare.
7. Final keyword is used to prevent child class from
overriding method of parent class.
8. Declaring class members or methods as static makes them
accessible without needing an instantiation of the class. A
member declared as static can not be accessed with an
instantiated class object (though a static method can).
Static properties cannot be accessed through the object
using the arrow operator ->.
Is This Answer Correct ? | 20 Yes | 1 No |
Post New Answer View All Answers
What is php mainly used for?
How to convert a character to an ascii value?
Explain Traits in PHP?
What is php session start?
how to track user logged out or not? when a user is idle?
How can image properties be retrieved in php?
What is the purpose of using php?
How do I run a php program in dreamweaver?
Is null empty php?
What is the meaning of ‘escaping to php’?
What is the meaning of symbol '$' in jquery?
Tell me what is the meaning of a final class and a final method?
What is the main function of php?
What are the differences between php constants and variables?
Tell me what are the encryption techniques in php?