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If you need your own implementation of Equals method of object what needs to be done
A) Overload Equals methodB) Override Equals methodC) Implements Equals method
learnasp
- Oct 12th, 2007
You also need to override the GetHashCode method if you override the equals method.Override the GetHashCode method to allow a type to work correctly in a hash table.Do not throw an exception in the im...
naveentej
- Jan 8th, 2006
Ans: BIn the System.Object class, equals() is defined as public virtual bool Equals(object obj);
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Is there an equivalent to the instanceof operator in Visual J++?
C# has the is operator: expr is type
Elean0r
- May 24th, 2011
The C# "is" operator can be used to test whether an object reference ( run-time type) is compatible with a defined type? ( compile type). ?The operator returns a Boolean result and is hence most often used within an if statement.
sasi4u
- Sep 29th, 2008
EX:==============using System; class ClassA {} public class TestIs{ public static void Test (object o) { ClassA a = null; &n...
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What is similar in concept to IL?
Skill/Topic: IntermediateA) Java Byte CodeB) C++ LibrariesC) Machine Language
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Method Overloading and Overriding are the same
Skill/Topic: IntermediateA) TrueB) FalseExplanation: Overloading is changing the behavior of a method in a derived class, whereas overriding is having multiple methods with the same name
samiksc
- Dec 29th, 2005
Method overloading means having two methods with the same name but different signatures in the same scope. These two methods may exist in the same class or one in base class and another in derived cla...
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Garbage Collector:
Skill/Topic: AdvancedA) Copies the IL code to the heapB) Destroys the pointersC) is responsible for automatic memory management
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Does Console.WriteLine() stop printing when it reaches a NULL character within a string?
Strings are not null terminated in the runtime, so embedded nulls are allowed. Console.WriteLine() and all similar methods continue until the end of the string.
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Why do I get a syntax error when trying to declare a variable called checked?
The word checked is a keyword in C#.
Elean0r
- May 23rd, 2011
checked is a keyword in c#, which causes designated expressions to be checked for arithmetic overflow. It may be used in one of two ways:1) block - checked {} , where the block of statements enclosed ...
Vikas Yadav
- Apr 5th, 2008
Reason is checked is a keyword in C#,but if u want to keyword as an identifier use @ with it.e.g int @checked=3;This works with all the keywords,but it is recommended to avoid it.
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How do destructors and garbage collection work in C#?
C# has finalizers (similar to destructors except that the runtime doesn't guarantee they'll be called), and they are specified as follows: class C{~C(){// your code}public static void Main() {}}Currently, they override object.Finalize(), which is called during the GC process.
Sarika Macha
- Apr 30th, 2011
Destructors implicitly calls Finalize() method. It is advised not to used Destructors because when GC runs it pushes the object which has destructor in FinalizeQueue and clears the object from memory ...
pritam83
- Sep 21st, 2007
If you are not declare any Main() method in your program then compiler will give you this errors. Basically Main() is the entry point for compiler for execution. One more thing C# ia a case sensitive ...
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How do I convert a string to an int in C#?
Here's an example: using System;class StringToInt{public static void Main(){String s = "105";int x = Convert.ToInt32(s);Console.WriteLine(x);}}
Viktor Toman
- Apr 13th, 2011
One more way:String str = "123";Int32 num;Boolean converted = Int32.TryParse(str, out num);
sahu
- Jan 6th, 2006
Ans:by using onvert.ToInt32(string)ExampleString s = "45";int x = Convert.ToInt32(s);
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ByteArray Class
Write a class called ByteArray that implement allocating, reading and writing to an array of bytes. The runtime environment has a limitation. The maximum continuous memory size that it can allocated is 64k bytes. It can allocate many 64K ( or less) chunks. The ByteArray class should hide this limitation and support allocating arrays larger than 64K as in the following example :ByteArray ba = new ByteArray...
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Whitespace in XML Parser
When whitespace is encountered by an XML parser within the element content, how is it handled by the XML parser?
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What is the nature of staticmembers of the class?
jaguarjj
- Mar 22nd, 2011
Static members of the class aren't instantiated upon creating any object of this class because static members are defined for all objects within the same class (i.e. when you create a class called ban...
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What is the advantage of using system.text.string builder over system.string?
jaguarjj
- Mar 22nd, 2011
System.text.string builder is mutable and can be changed and modified whereas string is immutable once it's created it cannot be modified but rather replaced and altered by a new one
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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.
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Value Types are stored on the heap ..? Is it true/False ?
Skill/Topic: AdvancedA) TrueB) False
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Where are custom exceptions derived from?
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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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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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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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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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