Define what are the difference between Structure and Class?

Define what are the difference between Structure and Class?
by

1 Answer

Answer :

1. Structures are value type and Classes are a reference type
2. Structures can not have contractors or destructors.
3. Classes can have both contractors and destructors.
4. Structures do not support Inheritance, while Classes support Inheritance.
by

Related questions

Define what is the difference between a class and an Interface?

Description : Define what is the difference between a class and an Interface?

Last Answer : 1. Abstract classes can have implementations for some of its members, but the interface can't have implementation for any of its members. 2. Interfaces cannot have fields whereas an ... 5. Abstract class members can have access modifiers whereas interface members cannot have access modifiers.

Define what is the difference between string keyword and System. String class?

Description : Define what is the difference between string keyword and System. String class?

Last Answer : String keyword is an alias for System. String class. Therefore, the System. String and string keyword are the same, and you can use whichever naming convention you prefer. The String class provides many methods for safely creating, manipulating, and comparing strings.

Define what is the difference between Class And Interface?

Description : Define what is the difference between Class And Interface?

Last Answer : Class is a logical representation of an object. It is a collection of data and related sub procedures with a definition. The interface is also a class containing methods which are not having any definitions. Class does not support multiple inheritances. But interface can support.

Briefly describe how a class is similar to a structure. How are they different?

Description : Briefly describe how a class is similar to a structure. How are they different?

Last Answer : Both classes and structures can have members such as methods, properties, and fields, both use a constructor for initialization, and both inherit from System.Object. Both classes and structures can be ... are value types, and the memory that holds structure instances is allocated on the stack. 

Define what is the syntax to inherit from a class in C#?

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

Define what is nested class?

Description : Define what is nested class?

Last Answer : Nested classes are classes within classes. A nested class is any class whose declaration occurs within the body of another class or interface.

Define what are the features of abstract class?

Description : Define what are the features of abstract class?

Last Answer : 1. An abstract class cannot be instantiated, and it is an error to use the new operator on an abstract class. 2. An abstract class is permitted (but not required) to contain abstract methods and accessors. 3. An abstract class cannot be scaled.

Define what is an interface class?

Description : Define what is an interface class?

Last Answer : It is an abstract class with public abstract methods all of which must be implemented in the inherited classes.

Define what is a base class?

Description : Define what is a base class?

Last Answer : A class declaration may specify a base class by following the class name with a colon and the name of the base class. omitting a base class specification is the same as deriving from type object.

What’s the difference between the Debug class and Trace class?

Description : What’s the difference between the Debug class and Trace class? 

Last Answer : Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds.

What is the difference between a Struct and a Class?

Description : What is the difference between a Struct and a Class? 

Last Answer : Structs are value-type variables and are thus saved on the stack, additional overhead but faster retrieval. Another difference is that structs cannot inherit.

What’s the difference between an interface and abstract class?

Description : What’s the difference between an interface and abstract class?

Last Answer : Answer: An abstract class and Interface both have method only but not have body of method.The difference between Abstract class and An Interface is that if u call Ablstract class then u have to call ... type, Parameter type, Parameter Number all must be same . Only body of method can change. 

In terms of constructors, what is the difference between: public MyDerived() : base() an public MyDerived() in a child class?

Description : In terms of constructors, what is the difference between: public MyDerived() : base() an public MyDerived() in a child class?

Last Answer : Nothing

What’s the difference between the Debug class and Trace class?

Description : What’s the difference between the Debug class and Trace class? 

Last Answer : Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds.

What is the difference between a Struct and a Class?

Description : What is the difference between a Struct and a Class?

Last Answer : Structs are value-type variables and are thus saved on the stack, additional overhead but faster retrieval. Another difference is that structs cannot inherit.

Define what are the difference between const and readonly?

Description : Define what are the difference between const and readonly?

Last Answer : A const cannot be static, while readonly can be static. A const need to be declared and initialized at declaration only, while a readonly can be initialized at the declaration or by the code in the ... A const's value is evaluated at design time, while a read-only value is evaluated at runtime.

Define what is the difference between an abstract method & virtual method?

Description : Define what is the difference between an abstract method & virtual method?

Last Answer : An Abstract method does not provide an implementation and forces overriding to the deriving class (unless the deriving class also an abstract class), whereas the virtual method has an ... abstract method does not provide implementation & forces the derived class to override the method.

Define what is the main difference between a sub procedure and a function?

Description : Define what is the main difference between a sub procedure and a function?

Last Answer : Sub procedures do not return a value, while functions do.

Define what is a basic difference between the while loop and do-while loop in C#?

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.

Define what is the difference between compile-time polymorphism and run-time polymorphism?

Description : Define what is the difference between compile-time polymorphism and run-time polymorphism?

Last Answer : Compile time Polymorphism Compile time Polymorphism also known as method overloading. Method overloading means having two or more methods with the same name but with different signatures. Run time ... or more methods with the same name, same signature but with a different implementation.

Define what is the difference between Shadowing and Overriding?

Description : Define what is the difference between Shadowing and Overriding?

Last Answer : Overriding redefines only the implementation while shadowing redefines the whole element. In overriding derived classes can refer the parent class element by using “ME” keyword, but in shadowing you can access it by “MY BASE”.

Define what is the main difference between a sub procedure and a function?

Description : Define what is the main difference between a sub procedure and a function?

Last Answer : Sub procedures do not return a value, while functions do.

Define what is the difference between CONST and READONLY?

Description : Define what is the difference between CONST and READONLY?

Last Answer : Both are meant for constant values. A const field can only be initialized at the declaration of the field. A read-only field can be initialized either at the declaration or.

Define what is the difference between Array and LinkedList?

Description : Define what is the difference between Array and LinkedList?

Last Answer : The array is a simple sequence of numbers which are not concerned about each other’s positions. they are independent of each other’s positions. adding, removing or modifying any array element is very easy. Compared to arrays, a linked list is a complicated sequence of numbers.

Define what is the difference between console and window application?

Description : Define what is the difference between console and window application?

Last Answer : A console application, which is designed to run at the command line with no user interface. A Windows application, which is designed to run on a user’s desktop and has a user interface.

Define what is the difference between Array and ArrayList?

Description : Define what is the difference between Array and ArrayList?

Last Answer : An array is a collection of the same type. The size of the array is fixed in its declaration. A linked list is similar to an array but it doesn’t have a limited size.

Define what is the difference between static and instance methods?

Description : Define what is the difference between static and instance methods?

Last Answer : A method declared with a static modifier is a static method. A static method does not operate on a specific instance and can only access static members. A method declared without a static modifier is an ... can be explicitly accessed as this. It is an error to refer to this in a static method.

Define what is the difference between break and continue statement?

Description : Define what is the difference between break and continue statement?

Last Answer : The break statement is used to terminate the current enclosing loop or conditional statements in which it appears. We have already used the break statement to come out of switch statements. The ... statement stops the current iteration and simply returns control back to the top of the loop.

Define what is the difference between value type and reference type?

Description : Define what is the difference between value type and reference type?

Last Answer : 1. Value types are stored on the stack and when a value of a variable is assigned to another variable. 2. Reference types are stored on the heap, and when an assignment between two reference variables occurs.

Define what is the difference between Custom Control and User Control?

Description : Define what is the difference between Custom Control and User Control?

Last Answer : Custom Controls have compiled the code (DLLs), easier to use, difficult to create, and can be placed in toolbox. Drag and Drop controls. Attributes can be set visually at design time. Can be ... the toolbox and dragged - dropped from it. A User Control is shared among the single application files.

Define what is the difference between constants, readonly and, static?

Description : Define what is the difference between constants, readonly and, static?

Last Answer : 1. Constants: The value can’t be changed. 2. Read-only: The value will be initialized only once from the constructor of the class. 3. Static: Value can be initialized once.

Define what is the difference between “out” and “ref” parameters in C#?

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.

Define what is the difference between “throw ex” and “throw” methods in C#?

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.

Define what is the difference between “finalize” and “finally” methods in C#?

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.

Define what is the difference between “dispose of” and “finalize” variables in C#?

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.

Define what is the difference between “constant” and “read-only” variables in C#?

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.

Describe an abstract class and explain when one might be useful.

Description : Describe an abstract class and explain when one might be useful.

Last Answer : An abstract class is a class that cannot be instantiated but must be inherited. It can contain both implemented methods and abstract methods, which must be implemented in an inheriting class. ... common interface for other methods, and leave more detailed implementation up to the inheriting class.

Do you need to instantiate a class before accessing a Shared (static) member? Why or why not?

Description : Do you need to instantiate a class before accessing a Shared (static) member? Why or why not?

Last Answer : Because a Shared (static) member belongs to the type rather than to any instance of the type, you can access the member without first creating an instance of the type.

How do you enable your application to use .NET base class library members without referencing their fully qualified names?

Description : How do you enable your application to use .NET base class library members without referencing their fully qualified names?

Last Answer : Use the Imports keyword (Visual Basic .NET) or the using keyword (Visual C#) to make a .NET Framework namespace visible to your application. 

what is Class ?

Description : what is Class ?

Last Answer : Answer:A group of objects that share a common definition and that therefore share common properties, operations, and behavior. A user-defined type that is defined with the class-key 'class,' 'struct, ... one class to be an expansion of another, and classes can restrict access to their members. 

How do you specify a custom attribute for the entire assembly (rather than for a class) ?

Description : How do you specify a custom attribute for the entire assembly (rather than for a class) ?

Last Answer : Answer: Global attributes must appear after any top-level using clauses and before the first type or namespace declarations. An example of this is as follows: using System; [assembly : ... that in an IDE-created project, by convention, these attributes are placed in AssemblyInfo.cs.

What is the role of the DataReader class in ADO.NET connections?

Description : What is the role of the DataReader class in ADO.NET connections?

Last Answer : It returns a read-only, forward-only rowset from the data source. A DataReader provides fast access when a forward-only sequential read is needed.

If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor?

Description : If a base class has a number of overloaded constructors, and an inheriting class has a number of overloaded constructors; can you enforce a call from an inherited constructor to a specific base constructor?

Last Answer : Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class.

What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Description : What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Last Answer : Value. The data type of the value parameter is defined by whatever data type the property is declared as.

What is an interface class?

Description : What is an interface class?

Last Answer : Interfaces, like classes, define a set of properties, methods, and events. But unlike classes, interfaces do not provide implementation. They are implemented by classes, and defined as separate entities from classes. 

When do you absolutely have to declare a class as abstract?

Description : When do you absolutely have to declare a class as abstract?

Last Answer : 1. When the class itself is inherited from an abstract class, but not all base abstract methods have been overridden. 2. When at least one of the methods in the class is abstract.

What’s an abstract class?

Description : What’s an abstract class?

Last Answer : Answer:Classes that cannot be instantiated. We cannot create an object from such a class for use in our program. We can use an abstract class as a base class, creating new classes that will inherit from ... can inherit from a non-abstract class. In C++, this concept is known as pure virtual method.

Can you allow a class to be inherited, but prevent the method from being over-ridden?

Description : Can you allow a class to be inherited, but prevent the method from being over-ridden?

Last Answer : Yes. Just leave the class public and make the method sealed. 

Can you prevent your class from being inherited by another class?

Description : Can you prevent your class from being inherited by another class?

Last Answer : Yes. The keyword “sealed” will prevent the class from being inherited. 

What is the syntax to inherit from a class in C#?

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