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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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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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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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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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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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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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What is similar in concept to IL?
Skill/Topic: IntermediateA) Java Byte CodeB) C++ LibrariesC) Machine Language
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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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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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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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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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Write a class in C# which get an action in its construction
Write a class in C# which get an action (parameter less delegate) in its construction and has a single public method ‘bool execute()’ which does following: 1. Execute the action only if no other thread is currently executing the action.2. If another thread is already executing, wait until thread finished before returning (but without executing action again)3. Return true if current thread that action,...
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Use C# to turn on the 4th and 7th bits
Use C# to turn on the 4th and 7th bits of a said byte myFlag, in which right most bit is first bit.Answer[Flags] enum BitFlags : byte { One = (1
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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 following can not be declared as virtual
A) Static functionsB) Member fieldsC) Instance functions
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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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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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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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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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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.
C# Interview Questions
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