Introduction:- Today I am here with OOPS
Logical questions in c#, which is mostly asked in every interview question. It will help you to crack C# OOPS interview.
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| OOPS Logical questions in c# |
Q1:What is
object?
An object
is an instance of the class and also it is a reference pointer of a class. It allocated the memory to access the
member of the class. If we want to access the class member we need to create an object
of that particular class.
Syntax for
Object
ClassName
objectname=new ClassName();
e.g
Employee emp=new Employee();
In the above syntax object emp is a reference pointer for the Employee class.
Q.2: What is the naming convention?
The naming convention is a set of or a business logic
rule by which we chose the character sequence to be used for
function, class, textbox or any other entities in our source code so that later
on we can easily remember these
sequence.
Q.3:Can we create a class name with the number?
No, We can't start a class name with the number only we can use the number in between i.e.
Public class Emp123
{
}
Q.4:Can we use a special character to create the
class?
Yes only underScore (_)
Q.5:By default class follow which access modifier?
Internal
Q.6:Types of Access specifier/modifier?
There is 5 types of access modifier.
1.Public
2.Private
3.Protected
4.Internal
5.Protected Internal
Q.7: Can we create the class as
private/protected/protected internal ?
No, By default class is Internal and you can mark class
as Public only.
Q.8: By default class members are, means access modifier?
Private
Q.9: Difference b/w public, private and internal
access modifier?
Difference
Public/private/Internal/Protected/Protected internal
1.Public: Accessible in any project, but you
have to add the reference
2.Private: Member can be accessed in the same class
only.
3.Internal: Same Project.same Library, same
assembly only.
4.Protected: Only available in child class.
5.Procted Internal: It behaves like protected + internal
Q.10: Difference between protected and protected
internal?
CheckOut this Link: https://www.dotnettutorial.co.in/2018/04/diffrence-between-protected-and.html
Q.11:Can we mark the method as a sealed.
Yes.
Q.12:Is it possible to overload static
constructor
No it's not.
Q.13:Why object of the abstract class can’t be
instantiate
An abstract class has a protected constructor (by
default) allowing derived types to initialize it.
An abstract type is defined largely as one that can't be created. You can create subtypes of it, but not of that type itself. The CLI will not let you do this.
An abstract type is defined largely as one that can't be created. You can create subtypes of it, but not of that type itself. The CLI will not let you do this.
Q.14:Does Enum Supports Inheritance
Enums do not support inheritance since they are
value type and therefore are sealed. Enum is like a struct.it is having the nature
of the sealed class. so it doesn't support inheritance.
Q.15:Where does the value of variables in
structure get stored in memory?
Its store on Stack because Structure is value
type.
Q.16:Can we use virtual keyword with
functions in interface
This is no need to use virtual keyword with
functions of the interface as it is by default made to override.
Q.17:Is it possible to change access specifier of
members of the interface.
No, We cannot make a change in the method of interface
just why because the interface is publicly exposed for construction, so interface
methods are public by default.
If you want to change access specifier of members
may you have to go for an abstract class instead of the interface.
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