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Following are the collections in C#:
Skill/Topic: AdvancedA) structsB) enumC) dictionariesExplanation: Ans. b & c. a isn’t a collection .
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LordAlex- Member Since Nov-2011 | Nov 5th, 2011
All collections directly or indirectly should implement the ICollection interface or the ICollection(Of T) generic interface. If you check System.Array you will see ICollection interface in there. Correct answer is C, it doesn't matter that there are methods that can provide arrays of Names and Values. Because if you are reasoning like this, it means bject.ToString().ToCharArray() cause all classes are being collections.
LordAlex
- Nov 5th, 2011
All collections directly or indirectly should implement the ICollection interface or the ICollection(Of T) generic interface. If you check System.Array you will see ICollection interface in there. Co...
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When do you absolutely have to declare a class as abstract ?
(as opposed to free-willed educated choice or decision based on UML diagram)? When at least one of the methods in the class is abstract. When the class itself is inherited from an abstract class, but not all base abstract methods have been over-ridden.
Devender Thadkapalli
- Nov 28th, 2011
When you do not want to create an object of the class and want to provide some abstract implementation
ex: Class HumanBeing. No Point of creating a class human being. You can create Men or Women out of it an create an object of the derived class -
All .NET code have to be CLS compliant
Skill/Topic: IntermediateA) TrueB) False
Sivavt
- Mar 26th, 2012
Not required. If you want your code to be CLS complaint use the annotation CLScompliant(true)
Ravi Kumar
- Dec 3rd, 2011
False All .Net code need not be CLS compliant if you are going to write all modules using single .Net language. However, if you are going to use different .Net language for different modules then you...
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Operator Overloading
Why should we have to overload ==(equals) and !=(not equals) operators in same program? If any one is not overloaded it gives error. Same with =?
kabilan
- Jan 3rd, 2012
Same class name and different parameters within one class
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Late and early binding
which one best in late binding and early binding? What is the difference between them ?
Sivavt
- Mar 26th, 2012
Early binding Or Compile time Or static binding: Assigning of object to type reference happens at compile time.
Late binding Or Run time Or Dynamic binding: Assigning of object to type reference happens at run time.
Early binding is efficient while late binding provides flexibility to programmers.Devender Thadkapalli
- Nov 28th, 2011
Early binding is best. Because any errors can be resolved at compile time. Late binding is at Run Time
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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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Any process can be divided into multiple
Skill/Topic: AdvancedA) ProgramsB) ThreadsC) Application domains
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LordAlex- Member Since Nov-2011 | Nov 5th, 2011
Application domains are typically created by runtime host( i.e. Windows process/program). Application domains provide an isolation boundary for security,.... .NET program is an Assembly loading into an Application domain. Threads are the operating system construct used by the common language runtime to execute code in Application domains. Therefore, for .NET, Process (runtime host) -> Application Domains -> Assemblies (.NET programs)-> Managed Threads.
Sivavt
- Mar 25th, 2012
App domains. This could be best understood by taking an example of a browser program. A browser may run multiple web applications simultaneously. All these could be run in separate app domains. So, i...
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Constructors can not be static ?
Sivavt
- Mar 25th, 2012
Yes, there can be a static constructor. It will be at class level & executed just once. It is totally in run-times control & not sure of when this will be executed. But, it is assured that it will be executed before creating instance of the class.
Aashish Chachra
- Mar 2nd, 2012
A class can have only one static constructor. Static constructor can not have any parameter. Static constructor cannot have any access specifier, not even private. It is used to initialize the static ...
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How do I get deterministic finalization in C#?
In a garbage collected environment, it's impossible to get true determinism. However, a design pattern that we recommend is implementing IDisposable on any class that contains a critical resource. Whenever this class is consumed, it may be placed in a using statement, as shown in the following example: using(FileStream myFile = File.Open(@"c:temptest.txt", FileMode.Open)){int fileOffset = 0;while(fileOffset...
anupamsh
- Mar 7th, 2012
That is true. A class implementing the interface IDisposable can be used in the using statement, something like: "c# using (MyClass objMyClass = new MyClass()) { objMy...
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What is Encoding and Serialization in .Net?
ffiv77
- Feb 20th, 2012
Serialization is the process of converting an object into a stream of bytes in order to persist it to memory, a database, or a file. Its main purpose is to save the state of an object in order to be able to recreate it when needed. The reverse process is called deserialization.
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How can you sort the elements of the array in descending order
A) Sort methodsB) Reverse methodsC) By calling Sort and then Reverse methodsD) Can’t sort in descending
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Answered by: Prakhar
- Apr 12th, 2006
int[] arr = new int[3];
arr[0] = 4;
arr[1] = 1;
arr[2] = 5;Array.Sort(arr);
Array.Reverse(arr);rfb99
- Dec 16th, 2011
It is far more elegant and efficient to do something like
Array.Sort(arr, delegate(int x, int y) { return y.CompareTo(x); }); -
Abstract usage in C#
Can any one give real time example for abstract class and virtual function plz in c#(.NET)
cse.jai
- Jan 20th, 2012
An abstract class is a class that cannot be instantiated. The purpose of an abstract class is to provide a common definition of a base class that multiple derived classes can share. For example, a cla...
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Which are the important features of IL
A) Use of attributesB) Strong data typingC) Object orientation & use of interfaceD) All of the above
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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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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 -
Program in c#
Need a program to search a word with all its Synonymous
ex : If I write screen find all that match of screen , lcd, monitor ,------ and so on -
Which of the following is not a member of System.Object?
a)Instance equalsb)Static Equalsc)Instance referenceequalsd)Instance Gettype
LordAlex
- Nov 5th, 2011
Instance equals - because Object has instance Equals
Instance referenceequals - because Object has static ReferenceEquals
Instance Gettype - because Object has instance GetType
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What is the advantage of Serialization ?
jaya
- Nov 4th, 2011
Serialization is a process of converting an object into a stream of data so that it can be is easily transmittable over the network or can be continued in a persistent storage location.
san82
- Apr 15th, 2009
Serialization in .NET allows the programmer to take an instance of an object and convert it into a format that is easily transmittable over the network, or even stored in a database or file system. Th...
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Which method is actually called ultimately when Console.WriteLine( ) is invoked
A) Append( )B) AppendFormat( )C) Tostring( )
LordAlex
- Nov 4th, 2011
Does some one dig the code with Reflector?? In deed, according the Reflector, see code.... it's clear only ToString() can be called. "c# public virtual void System.TextWriter....
Seeker911
- Jun 15th, 2011
The answer is CUltimately ToString() is called. Depending on what overload is used when calling Console.WriteLine() either Append or AppendFormat will be called called then ToString()
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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.
C# Interview Questions
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