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If we need to compare X to a value 3 how do we do it in C#
A) If (X==3)B) If (X=3)C) If (X.equals(3) )
Aby Kurian
- Jan 29th, 2007
If x is an integer then
if (x==3){your code}
if x is string the convert value to integer then apply this code -
Which of the following is wrong with regards to Out keyword
A) For Out parameters a variable can be passed which has not initializedB) If Out parameters are not assigned a value with in the function body compiler throws errorC) The variable passed as a Out parameter must be static
Sanjida123
- Jun 4th, 2010
Let's see what is out? Out is a keyword used to fill value to the parameter named as out.A) For Out parameters a variable can be passed which has not initialized - TrueWe can pass an uninitializ...
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Assembly version information is stored in the:
Skill/Topic: AdvancedA) ManifestB) Garbage CollectorC) Heap
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C# Serializable Keyword
What is the use of serializable keyword in C#?
kirangiet
- Jun 8th, 2010
We usually serialize the object, which we are transferring across processes.Example: When we are using Out Proc session Management we should add the serializable attribute at the top of the class.e.g.[Serializable]public Class Employee{public string Name;public int Age;}
azita2005
- Apr 6th, 2010
Serialization is the process of taking an object and convert it to a format that can be transmitted over the network or save in database or store in the file.Objects may be serialized in three fo...
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What is page life cycle in c#.net
kirangiet
- Jun 8th, 2010
Following are the events occur during ASP.NET Page Life Cycle:1) Page_PreInit2) Page_Init3) Page_InitComplete4) Page_PreLoad5) Page_Load6) Control Events7) Page_LoadComplete8) Page_PreRender9) SaveVie...
sd.rawat
- Dec 29th, 2009
There are 10 different stages and methods in page life cycle Stage - Method 1) Page Initialization - Page_Init 2) View State Loading - LoadViewState 3) PostBack data processing - LoadPostData 4) Page ...
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Can you prevent your class from being inherited and becoming a base class for some other classes?
Yes, that is what keyword sealed in the class definition is for. The developer trying to derive from your class will get a message: cannot inherit from Sealed class WhateverBaseClassName. It is the same concept as final class in Java.
sabir
- Jan 6th, 2006
Can be done by using the keyword "not inhertitable "syntax is not inheritable class '''''''''''''''codeend class
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Unsafe Keyword
Why we use pointer in C#.NET with Unsafe keyword?
phanish
- Jul 16th, 2010
In C# the value can be directly referenced to a variable, so there is no need of pointer. Use of pointer sometime crashes the application. But C# supports pointer, that means we can use pointer in C#....
kvvsmbalaji
- Jul 16th, 2010
As we know, the CLR is responsible for managing the execution of code compiled for the .NET platform. The code that satisfies the CLR at runtime in order to execute is reffered as Managed Code.Un...
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C# Error - Overload for method
I took a button in form.I have two classes emp and bonus.bonus class is inherited from emp class.If bonus is giving ie in dialog box if we select ‘Yes’ b ie bonus is added to sal and we get ts ie total sal along with eno.If bonus is not given ie in dialog box if we select ‘No’ we need to get only sal along with eno.The following pgm is working fine.class emp { private int...
bhanu supriya
- Jul 19th, 2010
Here you are passing parameters to the class itself...You have to pass the parameters to method.
sudhakarr.net
- Jul 11th, 2008
Hi aarruunnaa,You try this code, if it is useful for you send me reply otherwise ask me again dont hesitate class emp {public int eno,sal; public emp(){}public emp(int eno,int sal) {this.eno=eno;...
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Where does the version dependencies recorded
A) Inside an assembly’s manifestB) Along with the project propertiesC) Both
Biswa Prakash Rath
- Feb 28th, 2006
Answer: A) Inside an assembly?s manifest
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Is there a way to force garbage collection?
Yes. Set all references to null and then call System.GC.Collect().If you need to have some objects destructed, and System.GC.Collect() doesn't seem to be doing it for you, you can force finalizers to be run by setting all the references to the object to null and then calling System.GC.RunFinalizers().
mrodenhauser
- Jul 29th, 2010
As others have mentioned forcing garbage collection is ill advised and really should not be necessary with proper implementations of IDisposable. One could probably argue that in .net ...
Sivakrishna
- Nov 12th, 2007
GC.Collect();It is recomended that you should not forcefully call the GC. GC does it in the optimal way, since it knows the inner details like which object actually created inner objects.But some case...
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What is managed code?
Skill/Topic: IntermediateA) Code managed ouside the ILB) Code which can't be managed by the ILC) Code written in VB.NETD) Code to be compiled by IL
levteck
- Aug 16th, 2010
C) Code written in VB.NET is managed code.??If it was written in Java it would be considered unmanaged.? If it is not compilable into IL to run on CLR than it is unmananged code.
vidyajnath
- Jul 5th, 2010
Code that targets the Common Language Runtime, the foundation of the .NET Framework, is known as Managed Code; Code that does not target the Common Language Runtime is known as Unmanaged Code.
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What is the difference between const and static read-only?
The difference is that static read-only can be modified by the containing class, but const can never be modified and must be initialized to a compile time constant. To expand on the static read-only case a bit, the containing class can only modify it:-- in the variable declaration (through a variable initializer).-- in the static constructor (instance constructors if it's not static).
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Editorial / Best Answer
Answered by: Eddie Quiroz
- Sep 3rd, 2005
A const must be initialized at the time of its creation. A readonly field can be assigned to once in the class constructor allowing you to pass in the value at run-time. Declaring fields as const protects both you and other programmers from accidentally changing the value of the field. Also note that with const fields, the compiler performs some optimization by not declaring any stack space for the field. The readonly keyword is similar to const, with two exceptions. First, the storage of a readonly field is the same as a regular read-write field, and thus there is no performance benefit. Secondly, readonly fields can be initialized in the constructor of the containing class.
md.shahidkamal
- Aug 16th, 2010
The Constant Fields are those which cannot be changed in runtime. Its value has to be assigned at declaration time. const string strMyString="Constant Data" ; //This is valid.Once declared now the val...
chandra_123
- Apr 7th, 2009
As static read-only variables must be initialized in the static constructor (static constructor cannot have parameters and it cannot be called manually), it is efficient to used const variables over static read-only variables if you know the values at creation of these variables.
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YIELD Keyword
What is the purpose of YIELD Keyword in C#?
diejmon
- Aug 18th, 2010
The yield keyword is used in an iterator block to provide a value to the enumerator object or to signal the end of the iteration. When used the expression is evaluated and returned as a value to the e...
phanish
- Jul 17th, 2010
Used in an iterator block to provide a value to the enumerator object or to signal the end of iteration. It takes one of the following forms: yield return ;yield break;
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Variable Declaration and Assignment
What is difference between these two statement? if variable is declared and assign value in following two waysString sValue = (String)GridView1.DataKeys[GridView1.SelectedIndex].Value;String sValue = GridView1.DataKeys[GridView1.SelectedIndex].Value.ToString();
gispadhu
- Aug 19th, 2010
The first statement can handle null values whereas the second statement throws an exception.
hdkhanna
- May 18th, 2010
First statement:String sValue = (String)GridView1.DataKeys[GridView1.SelectedIndex].Value;The above statement uses type casting (explicit) to convert the value to string. Second statement:String sValu...
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What does the keyword virtual mean in the method definition?
The method can be over-ridden.
smandke
- Aug 27th, 2010
Virtual method in C# is a used to support polymorphism. This means that in a base class we will define a method foo1() with the keyword "virtual" and the derived classes will inherit t...
sahajanandk
- Mar 9th, 2009
Keyword virtual is used to make changes to the methods inside the virtual class while runtime. the virtual class should be overide with the same modifier, return type and the name.
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C# Program to test efficient coding
You have several instances of the following class (User). Provide a class with three methods:"AddUser" accepts a User instance as a parameter and add it to a collection."GetUser" accepts a UserID as a parameter and returns the corresponding User instance. It is important that this executes quickly as it will be used often."GetOrderedUserArray" returns an array of User instances ordered by UserID....
jankajg
- Sep 25th, 2010
@asaf122 - your method can be improved a bit by using list. Find even better by lambda expressions) here is howclass UserManager{private List list; internal List List{get { return list; }set { list va...
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Output of int sqrt(volatile int *ptr){ return (*ptr**ptr);}
garanaveen
- Sep 25th, 2010
This question is an interview question which is asked to test the possible problems with the code if any.This function is supposed to calculate the square of the number pointed by ptr.As it is volatil...
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Where are custom exceptions derived from?
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Value Types are stored on the heap ..? Is it true/False ?
Skill/Topic: AdvancedA) TrueB) False
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Singleton Class
Give an example of inbuilt Singleton Class in .NET.
BhavinRudani
- Dec 23rd, 2010
The Singleton is class which only allows a single instance of itself to be created and usually gives access to the instace.Benifits:Instance ControlSingleton class prevents other object from instantia...
sushil_gupta
- Oct 8th, 2010
In Singleton class we can create only one object throughout the lifetime of class.Singleton is a design pattern and based on that pattern this class is implemented.
C# Interview Questions
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