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Cache is a type of memory that is used to increase the speed of data access. Normally, the data required for any process resides in the main memory. However, it is transferred to the cache memory temporarily if it is used frequently enough.A diagram to better understand the data transfer in cache management is as follows −Cache PerformanceThe cache performance can be explained using the following steps −If a process needs some data, it first searches in the cache memory. If the data is available in the cache, this is termed as a cache hit and the data is accessed ... Read More
String stands for System.String whereas string is an alias in C# for System.String −For examplestring str = "Welcome!";It’s not essential, but generally String is used when you work with classes.string str = String.Format("Welcome! {0}!", user);Since the string is an alias for System. String. The alias for other datatypes are −Exampleobject: System.Object string: System.String bool: System.Boolean float: System.Single double: System.Double decimal: System.Decimal byte: System.Byte sbyte: System.SByte short: System.Int16 ushort: System.UInt16 int: System.Int32 uint: System.UInt32 long: System.Int64 ulong: System.UInt64 char: System.Char
The constants refer to fixed values that the program may not alter during its execution. These fixed values are also called literals. Constants can be of any of the basic data types like an integer constant, a floating constant, a character constant, or a string literal. There are also enumeration constants as well.An integer literal can be a decimal, or hexadecimal constant. A prefix specifies the base or radix: 0x or 0X for hexadecimal, and there is no prefix id for decimal.150 300uA floating-point literal has an integer part, a decimal point, a fractional part, and an exponent part.3.14159 235468E-7FString ... Read More
The String.Copy() method creates a new instance of String. This is same as the specified String.The following is an example of Copy() method −Example Live Demousing System; class Demo { static void Main(String[] args) { string str1 = "mark"; string str2 = "marcus"; Console.WriteLine("str1 = '{0}'", str1); Console.WriteLine("str2 = '{0}'", str2); Console.WriteLine("After using String.Copy..."); str2 = String.Copy(str1); Console.WriteLine("str1 = '{0}'", str1); Console.WriteLine("str2 = '{0}'", str2); } }Outputstr1 = 'mark' str2 = ... Read More
An interface is a class without fields or method implementation. It cannot implement the methods it defines.A class generally implements the methods defined in an interface.InterfaceInterfaces define properties, methods, and events, which are the members of the interface. Interfaces contain only the declaration of the members. It is the responsibility of the deriving class to define the members.public interface interface_name { // interface_members }ClassClass is a blueprint for a data type. This does not actually define any data, but it does define what the class name means. That is, what an object of the class consists of and what ... Read More
The ArrayCopyTo() method copies all the elements of the current one-dimensional Array to the specified one-dimensional Array starting at the specified destination Array index. The index is specified as a 32-bit integer.The CopyTo() method in C# is used to copy elements of one array to another array. In this method, you can set the starting index from where you want to copy from the source array.The following is an example showing the usage of CopyTo(, ) method of array class in C# −Exampleusing System; class Program { static void Main() { int[] arrSource = new ... Read More
The following are the types of expressions in C# −lvalue − An expression that is an lvalue may appear as either the left-hand or right-hand side of an assignment.rvalue − An expression that is an rvalue may appear on the right- but not left-hand side of an assignment.Variables are lvalues and hence they may appear on the left-hand side of an assignment. Numeric literals are rvalues and hence they may not be assigned and cannot appear on the left-hand side.Here is a valid C# statement −int a = 100:
The FizzBuzz problem states that −Display "Fizz" instead of the number for each multiple of 3,Display "Buzz", instead of the number for each multiple of 5.Display "FizzBuzz", instead of the number for each multiple of 5 & 3Let us see how to implement the above using C# −Exampleusing System; class Demo { static void Main(String[] args) { for(int i=1;i
Non-static classes can be instantiated, whereas static classes cannot be instantiated i.e. you cannot use the new keyword to create a variable of the class type.Non-static classes can have instance method and static methods.Access the members of a static class by using the class name itself, whereas Static class is sealed.Example of non-static class −public class CalculateExample of static class −public static class Calculate
The virtual keyword is useful in modifying a method, property, indexer, or event. When you have a function defined in a class that you want to be implemented in an inherited class(es), you use virtual functions. The virtual functions could be implemented differently in different inherited class and the call to these functions will be decided at runtime.The following is a virtual functionpublic virtual int area() { }Here is an example showing how to work with virtual functions −Exampleusing System; namespace PolymorphismApplication { class Shape { protected int width, height; ... Read More