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GetEnumerator( ) of Ienumerable interface returns
A) IenumeratorB) IcollectionC) Ienumerable
Khaja
- Sep 23rd, 2006
The foreach loop automatically uses the IEnumerable interface, invoking GetEnumerator( ).The GetEnumerator method is declared to return an IEnumerator of string:public IEnumerator GetEnumerator( )
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What happens when you create an arraylist as ArrayList Arr=new ArrayList()
A) An arraylist of object Arr is created with the capacity of 16B) An arraylist of object Arr is created with the capacity of 20C) An arraylist of object Arr is created with the capacity of 26Explanation: Default capacity is 16 if size is not specified
Darain
- Mar 19th, 2009
In .Net v1, default initial capacity of ArrayList is 16.In .Net v2, default initial capacity of ArrayList lowered to 4.In .Net v3.5, default initial capacity of ArrayList lowered to 0.Now, when ...
nitin
- Nov 16th, 2006
A is the correct answer!!
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In order to use stringbuilder in our class we need to refer
A) System.TextB) System.IOC) System.StringBuilder
Prakhar
- Apr 11th, 2006
We only need to refer System.Text namespace. StringBuilder Class is contained in the System.Text namespace. hence we need to add the following lines in pur code:using System.Text;
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For performing repeated modification on string which class is preferred
A) StringB) StringBuilderC) Both
Anilkumar Lella
- May 20th, 2011
String builder is mutable and string is immutable.Immutable means whose contents can't be modified.Mutable objects are the objects whose content can be change.so performing repeated modification on string we can use string builder class.
samiksc
- Jan 9th, 2006
Answer B is correct. StringBuilder class is preferred for performing repeated operations on string since its value is mutable. String class represents a text value which is immutable. All operations o...
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How are the attributes specified in C#
A) Enclosed with in [ ]B) Enclosed with in ( )C) Enclosed with in { }
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Which preprocessor directive are used to mark that contain block of code is to be treated as a single block
A) # define & #undefB) # Region & #EndRegionC) #Line
Frank Neubecker
- Feb 23rd, 2006
actually,#region and #endregion(case sensitive)
samiksc
- Jan 9th, 2006
(B) #Region and #EndRegion indicates a block of code which can be expanded / collapsed.
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Which method is implicitly called when an object is created
A) Main MethodB) Constructor MethodC) Destructor MethodExplanation: Constructor is the method which is implicitly created when ever a class is instantiated
shivkant.pawan
- Nov 26th, 2007
When a obeject create then constructor of the class execute at that moment. If you don't define any constructor in a class then JVM pass a default constructor but if you define any parametrized constructor in class then this is programmers responsiblity to pass default constructor in that class.
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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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It is not permitted to declare modifier on the members in an interface definition
A) TrueB) False
pankajbanga
- Feb 26th, 2007
Interface members are implicitly public, explicit modifiers are not allowed.
Rohit Sharma
- Apr 21st, 2006
A is the correct answer. By default all the members in an Interface definition are public, so there is no need to declare access modifier public. It would be a compile time error otherwise.
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What is the difference between a struct and a class in C#?
From language spec:The list of similarities between classes and structs is as follows. Longstructs can implement interfaces and can have the same kinds of members as classes. Structs differ from classes in several important ways; however, structs are value types rather than reference types, and inheritance is not supported for structs. Struct values are stored on the stack or in-line. Careful programmers...
samiksc
- Dec 7th, 2005
Following are the main points of difference between classes and structs in C#:Value type vs Reference type: Structs are value type and classes are reference type. Whenever a struct object is assigned ...
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Sealed class can be inherited
A) TrueB) FalseExplanation: Sealed class cannot be inherited
Rohit Sharma
- Apr 20th, 2006
False. The sealed class can not be inherited. This can be acheived by using the keyword "sealed". what this keyword does, it tells the compiler that it is the last class in the class hierarchy. The be...
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Which of the following can not be declared as virtual
A) Static functionsB) Member fieldsC) Instance functions
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Which of the following is not a C# reserved keyword
A) IsB) AsC) InD) Of
pankajbanga
- Feb 25th, 2007
of is definitely the culprit is – checks object's compatibility with a given type. in – is used with foreach statement to iterate through items in a collection as ...
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Which of the member is not a member of Object
A) Equals ( )B) GetType ( )C) ToString ( )D) Parse( )
sasidhar16
- May 30th, 2011
Parse() is not the member of Object, GetHashCode() is the fourth method apart from A,B,C method options given in question
dreammunna
- May 2nd, 2006
Hi Followings are the member of System.ObjectEquals()GetHashCode()GetType()Object()ReferenceEqualsToString
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Which statement is invalid with regards to Constant
A) They must be initialized when they are declaredB) The value of the constant must be computable at compile timeC) Constants are not staticD) Constant is a variable whose value can be changed through out it’s life time when it is static.
Elean0r
- May 25th, 2011
Statement D is definitely invalid. Statement C occupies a grey area, since:a) a const field will have the same value in each object of that class; so it appears to? have same effect as a static reado...
levteck
- Aug 16th, 2010
Straight out of MSDN:"The static modifier is not allowed in a constant declaration."The invalid statement is d)
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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
C# Interview Questions
Ans