Description : Define what are sealed classes in C#?
Last Answer : The sealed modifier is used to prevent derivation from a class. A compile-time error occurs if a sealed class is specified as the base class of another class.
Description : Give an example of using a sealed class in C#?
Last Answer : Below is the sample code of sealed class in C# - class X {} sealed class Y : X {} Sealed methods - class A { protected virtual void First() { } protected virtual void Second() { } } ... inherits from class B then method - First will not be overridable as this method is sealed in class B.
Description : Explain sealed class in C#?
Last Answer : A sealed class is used to prevent the class from being inherited from other classes. So “sealed” modifier also can be used with methods to avoid the methods to override in the child classes.
Description : What are Sealed Classes in C#?
Last Answer : The sealed modifier is used to prevent derivation from a class
Description : Define what are the advantages of getting and set properties in C#?
Last Answer : 1. The get property accessor is used to return the property value. 2. The set property accessor is used to assign a new value.
Description : Define what is a basic difference between the while loop and do-while loop in C#?
Last Answer : The while loop tests its condition at the beginning, which means that the enclosed set of statements run for zero or more number of times if the condition evaluates to true. The do while loop iterates a set of statements at least once and then checks the condition at the end.
Description : Define what is the syntax to inherit from a class in C#?
Last Answer : When a class is derived from another class, then the members of the base class become the members of the derived class. The access modifier used while accessing members of the base class specifies ... syntax to inherit a class from another class In C# is as follows: class MyNewClass : MyBaseClass
Description : Define what Command is used to implement properties in C#?
Last Answer : get & set access modifiers are used to implement properties in c#.
Description : Define what is the main use of delegates in C#?
Last Answer : Delegates are mainly used to define call back methods.
Description : Define what are the different types of literals in C#?
Last Answer : Boolean literals: True and False are literals of the Boolean type that map to the true and false state, respectively. Integer literals: Used to write values of types Int, uint, long, and ulong. Real ... by a double-quote character, such as © hello . The Null literal: Represents the null-type.
Description : Define what is meant by operators in c#?
Last Answer : An operator is a member that defines the meaning of applying a particular expression operator to instances of a class. Three kinds of operators can be defined: unary operators, binary operators, and conversion operators. All operators must be declared as public and static.
Description : Define what are the special operators in C#?
Last Answer : C# supports the following special operators. is (relational operator) as (relational operator) type (tape operator) sizeof (size operator) new (object creator) .dot (member access operator) checked (overflow checking) unchecked (prevention of overflow checking)
Description : Define what are the different types of variables in C#?
Last Answer : Different types of variables used in C# are : static variables instance variable value parameters reference parameters array elements output parameters local variables
Description : Define what are the features of c#?
Last Answer : 1. C# is a simple and powerful programming language for writing enterprise edition applications. 2. This is a hybrid of C++ and VB. It retains many C++ features in the ... introduces considerable improvement and innovations in areas such as type safety, versioning. events and garbage collections.
Description : Define what are the two data types available in C#?
Last Answer : Value type Reference type
Description : Define what are the different types of statements supported in C#?
Last Answer : C# supports several different kinds of statements are Block statements Declaration statements Expression statements Selection statements Iteration statements Jump statements Try catch statements Checked and unchecked Lock statement
Description : Define what are reference types in C#?
Last Answer : Below is the list of reference types in C# – 1. class 2. string 3. interface 4. object
Description : Define what are value types in C#?
Last Answer : Below is the list of value types in C# – decimal int byte enum double long float
Description : Define Jagged Arrays in C#?
Last Answer : If the elements of an array is an array then it’s called a jagged array. The elements can be of different sizes and dimensions.
Description : Define what is the difference between “out” and “ref” parameters in C#?
Last Answer : “out” parameter can be passed to a method and it need not be initialized whereas “ref” parameter has to be initialized before it is used.
Description : Define what are the differences between static, public and void in C#?
Last Answer : 1. Static classes/methods/variables are accessible throughout the application without creating an instance. The compiler will store the method address as an entry point. 2. Public methods or variables are accessible ... 3. The void is used for the methods to indicate it will not return any value.
Description : Define what is the difference between “throw ex” and “throw” methods in C#?
Last Answer : “throw ex” will replace the stack trace of the exception with stack trace info of rethrowing point. “throw” will preserve the original stack trace info.
Description : Define what is the difference between “finalize” and “finally” methods in C#?
Last Answer : Finalize – This method is used for garbage collection. So before destroying an object, this method is called as part of the cleanup activity. Finally – This method is used for executing the code irrespective of exception occurred or not.
Description : Define what is the difference between “dispose of” and “finalize” variables in C#?
Last Answer : Dispose of - This method uses interface - IDisposable interface and it will free up both managed and unmanaged codes like - database connection, files, etc. Finalize - This method is called internally ... called explicitly. It is called by the garbage collector and can't be called from the code.
Description : Define what is the difference between “constant” and “read-only” variables in C#?
Last Answer : Const keyword is used for making an entity constant. We cannot modify the value later in the code. Value assigning is mandatory to constant variables. read-only variable value can be changed ... and value to read-only variables can be assigned in the constructor or at the time of declaration.
Description : Define what is IDE’s provided by Microsoft for C# development?
Last Answer : Below are the IDE’s used for C# development – Visual Studio Express (VCE) Visual Studio (VS) Visual Web Developer
Description : Can we declare a method as sealed?
Last Answer : In C# a method can’t be declared as sealed. However, when we override a method in a derived class, we can declare the overridden method as sealed. By declaring it as sealed, we can avoid further overriding of this method.
Description : In Visual Basic .NET or Visual C# programming, when would you use Structured Query Language (SQL)? How are they executed?
Last Answer : ADO.NET handles most of the database communication for you behind-thescenes. You would only use SQL statements when generating ad-hoc queries for the database. You execute SQL statements by ... returning statements, such as DELETE, INSERT INTO, or UPDATE statements, use the ExecuteNonQuery method.
Description : Can you change the value of a variable while debugging a C# application?
Last Answer : Yes. If you are debugging via Visual Studio.NET, just go to Immediate window.
Description : How do you generate documentation from the C# file commented properly with a command-line compiler?
Last Answer : Compile it with the /doc switch.
Description : What is the syntax to inherit from a class in C#?
Last Answer : Place a colon and then the name of the base class. Example: class MyNewClass : MyBaseClass
Description : What’s the C# syntax to catch any possible exception?
Last Answer : A catch block that catches the exception of type System.Exception. You can also omit the parameter data type in this case and just write catch {}.
Description : Does C# support multiple-inheritance?
Last Answer : No.
Description : List the differences in C# 2.0.
Last Answer : • Generics • Iterators • Partial class definitions • Nullable Types • Anonymous methods • :: operator • Static classes static class members • Extern keyword • Accessor accessibility • Covariance and Contravariance • Fixed size buffers • Fixed assemblies • #pragma warning
Description : What mechanisms does C# have for the readers, writers problem?
Last Answer : System.Threading.ReaderWriterLock which has methods AcquireReaderLock, ReleaseReaderLock, AcquireWriterLock, and ReleaseWriterLock
Description : Does C# have “friendship”?
Last Answer : Not before C# 2.0
Description : Does C# supports multiple inheritance?
Last Answer : No
Description : Can C# have multiple catch blocks?
Last Answer : Yes
Description : Can C# have global overflow checking?
Description : Name 10 C# keywords.
Last Answer : abstract, event, new, struct, explicit, null, base, extern, object, this
Description : Will we eventually see a .NET Framework-based version of Java as a competitor to C#?
Last Answer : Apparently not. Microsoft will never offer a complete Java environment because Sun has essentially required that Java licensees implement all of Java-something Microsoft will never do. (Why should it? Does ... she's working in a true Java environment because the familiar libraries won't be there.
Description : But won't most .NET developers eventually choose C# over Visual Basic.NET?
Last Answer : No. Because the power of the two languages is so similar, the primary factor for developers migrating to the .NET world will probably be the syntax they prefer. Since many more developers ... the dominant language for building Windows applications five years from now will still be Visual Basic.
Description : Isn't C# the native language of .NET?
Last Answer : Every language built on the .NET Framework must use the CLR. The CLR defines core language semantics, and so all of the languages built on it tend to have a great deal in common. The biggest choice a . ... just a little bit more-and so neither is the "native" .NET language. There is no such thing.
Description : Isn't C# just a copy of Java?
Last Answer : In some ways, yes. The semantics of the CLR are quite Java-esque, and so any CLR-based language will have a good deal in common with Java. Creating a language that expresses those semantics in a syntax ... had been free to make some changes to Java, my guess is that C# wouldn't exist today.
Description : Which is better: C# or Java?
Last Answer : The two languages have an awful lot in common, and so in some ways it's natural to try to choose a winner. The fact that each language is often viewed as the flagship of its camp-C# in Microsoft's . ... like the radio. You can do it, but you'll be happier if you choose based on the whole package.