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How do you create a pure virtual function in c#?
asaf122
- Jan 28th, 2010
As I know pure virtual doesn't exist in C# (it's C++ concept)If you are using abstract class you cannot make instance of this class but you can implement functions.
richa2008
- Dec 4th, 2008
User abstract modifier on method.Class must also be marked as abstract.An abstract method cannot have implementation.
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Multicast Delegate
What is multicast delegate? When it is used?
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When to use string classes
when we have string builder which are mutable why we need immutable string classes in C#.
Denial
- Aug 14th, 2013
String: String are immutable that is every time you make changes to a string object, the string is destroyed and a new string is created with modifications you applied to previous string. All this is ...
Sivavt
- Mar 25th, 2012
String is immutable, meaning, if there is any change in the string value, run time allocates new memory & assign it to the string reference. For the programmer, it looks like the same string but inter...
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What is the difference between an interface and abstract class?
In the interface all methods must be abstract; in the abstract class some methods can be concrete. In the interface no accessibility modifiers are allowed, which is ok in abstract classes.
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Will finally block get executed if the exception had not occurred?
Yes. What is the C# equivalent of C++ catch (…), which was a catch-all statement for any possible exception?
Sivavt
- Mar 25th, 2012
Yes. Finally will be executed even if the exception hasn't occurred. Catch all statement.
Code- try{}
- catch{}
- Or
- try{}
- catch(Exception e){}
Dadan Tiwari
- Feb 13th, 2012
Yes. Finally block will always execute whether execption occur or not.
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Is it mandatory to implement all the methods which are there in abstract class if we inherit that abstract class..?
Abhijeet Gawali
- Apr 20th, 2018
Yes, if u Create Abstract class one or more abstract method in class. If after inherit Abstract Class all abstract methods are compulsory/Mandatory implemented in derived class., otherwise they gene...
navneetgoyal2000
- Jan 6th, 2011
NOEven you need not to implement ALL of the PURE VIRTUAL FUNCTIONS of Abstract Class, in Derived Class.But then, the Derived class too will be an Abstract Class.Now Question Arises:What is the Use of ...
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Which of the following is used to denote comments in C#?
Skill/Topic: IntermediateA) /* */B) //C) ///Explanation: /// is used from XML documentation
sahilpopli
- Nov 10th, 2011
A) /*Is used for multiple
lines omments */
// and
B) // is used for singlr line comment -
IF a namespace isn't supplied, which namespace does a class belong to
Skill/Topic: IntermediateA) a nameless global namespaceB) SystemC) Windows
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1. Are there some features of C# language not supported by .NET?
Skill/Topic: AdvancedA) YesB) NoExplanation: For example some instances of operator overloading!
whbloodworth
- Jan 25th, 2008
With respect to multiple inheritance, I would have to say that the answer is "mostly" that C# does not support multiple inheritance. The "mostly" part does not take into accoun...
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Interface members can not be declared as
A) VirtualB) StaticC) PrivateD) All of the above
pankajbanga
- Feb 26th, 2007
Answer is all of the aboveinterface members are implicitly public, explicit modifiers are not allowed.
dan
- Mar 8th, 2006
Interface members are public by default. But we dont/cant specify modifiers to them so that we dont fall into the impression that thay can also be private or ..... They are public by default and we dont have to specify that!
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What is the difference between shadow and override
Override id used for variables and methods but override only used for methods.
whbloodworth
- Jan 25th, 2008
The best way, in my opinion, to understand the true meaning of the effects of using the "new" modifier in a virtual hierarchy is to think of it like this... The runtime wants to start at the...
whbloodworth
- Jan 25th, 2008
No, the VB.NET "shadow" is not exactly the same as the C# "new" override... even though it produces similar behaviour. To see the differences, look at the IL generated.
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What is late binding and early binding? What is the benefits and disadvantages of using them?
Devender Thadkapalli
- Nov 28th, 2011
Early binding is better. You can make your objects strongly type and resolve the errors if any at compile time instead of runtime
Suresh Jayaraman
- Sep 30th, 2011
The polymorphism is achieved by early binding and late binding Early Binding: Compiler bind the objects to methods at the compile time.This is called early binding or static binding.Function overloa...
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The following is a correct call to the Main() function
Skill/Topic: BeginnerA) static void Main()B) static Main(void)C) Main()
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The field variables in a class or a struct in C# are by default given a value of zero
Skill/Topic: BeginnerA) TrueB) False
mwelo
- Jun 19th, 2009
The right answer is true not false! The rules are slightly different between classes and structs...
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Does C# support multiple inheritance?
Skill/Topic: IntermediateA) YesB) No
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XML documents for a C# program can be generated using
Skill/Topic: IntermediateA) /xmldoc switchB) /doc switchC) /gendoc switch
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A delegate in C# is similar to:
Skill/Topic: AdvancedA) COMB) a function pointerC) a pointer
Amit
- Oct 13th, 2006
Its Function Pointer Definetly
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In C# events are actually a special form of delegates
A) TrueB) False
LordAlex
- Nov 3rd, 2011
An event is a member that enables a class or object to provide notifications. An event is declared like a field except that the declaration includes an event keyword and the type must be a delegate ty...
vishnupavadi
- Aug 8th, 2011
False
event is an instance of delegate which is used to notify some action of an object to other object. -
Which Variable type is best to choosen for accepting Null Values?
C# Interview Questions
Ans