Tag: C#

Interview question: In c#, How can we create a function which can accept varying number of arguments?

Posted on By DesiBanjara No Comments on Interview question: In c#, How can we create a function which can accept varying number of arguments?

By using the params keyword, a method parameter can be specified which takes a variable number of arguments or even no argument. After the params keyword used in a method declaration, no additional parameters are permitted. Also only one params keyword is allowed in a method declaration. [amazon_link asins=’B0719KCBZT,B0779CNVM8,B011V135LM,B01CZWN0TI,B078NRPJT6,B00F0P2H06,B01FFQ1FS4,B00XHVQZNA,B011V108H6|B000BJVUS6,B01HEZ5H6K,B00IG6GEVO,B0199NOWM0,B00SNH9TKO,B01I9EFN1Y,B00EEV2QVW,B0107BYPLG,B005ANYMG0′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’85aaae9a-94e4-11e8-aef2-6dca01bb821b’]

C# development, Interview questions, IT/Software development

Interview question: What is the use of NULL Coalescing Operator (??) in C#?

Posted on By DesiBanjara No Comments on Interview question: What is the use of NULL Coalescing Operator (??) in C#?

The Null coalescing operator is used with the nullable value types and reference types. It is a binary operator that simplifies checking for null values. If the value of the first operand is null, then the operator returns the value of second operand, otherwise it returns the value of the first operand. Example:  x ??…

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Interview question: What are nullable types in C#?

Posted on By DesiBanjara No Comments on Interview question: What are nullable types in C#?

C# provides a special data types, the nullable types, to which you can assign normal range of values as well as null values. [amazon_link asins=’B0719KCBZT,B0779CNVM8,B01CZWN0TI,B011V135LM,B0072T3X38,B078NRPJT6,B01FFQ1FS4,B00XHVQZNA,B011V108H6|B000BJVUS6,B01HEZ5H6K,B0199NOWM0,B00SNH9TKO,B01I9EFN1Y,B00EEV2QVW,B0107BYPLG,B005ANYMG0′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’8afacfe7-94e3-11e8-8441-67501bd4f6a0′]

C# development, Interview questions, IT/Software development

Interview question: What is the purpose of an access specifier in C#?

Posted on By DesiBanjara No Comments on Interview question: What is the purpose of an access specifier in C#?

The purpose of an access specifier is to define the scope and visibility of a class member. C# provides five access specifiers: public, private , protected , internal and protected internal. Public access specifier allows a class to expose its member variables and member functions to other functions and objects. Any public member can be accessed from…

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C# development, Interview questions, IT/Software development

Interview question: What is encapsulation?

Posted on By DesiBanjara No Comments on Interview question: What is encapsulation?

[amazon_textlink asin=’8120352068|1491987650′ text=’Encapsulation’ template=’ProductLink’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’f15ac4fb-aa0b-11e8-8a76-3b617ede6a31′] is defined ‘as the process of enclosing one or more items within a physical or logical package’. In other words, Encapsulation is a process of binding data members (variables, properties) and member functions (methods) into a single unit. And Class is the best example of encapsulation. In [amazon_textlink asin=’9351191494|1292024011′…

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C# development, IT/Software development

Interview question: What is the purpose of “is” operator in C#?

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“is” operator determines whether an object is of certain type. Ex- If (David is Employee) // checks if David is an object of the Employee class. [amazon_link asins=’007070368X,8120352068,9352136640,8120349172,B015KHN65I,B075GTLVJ2,B06X3WF5FJ|1491988533,1491987650,B016Z18MLG,B000BJVUS6,B00DUQH1IK,B01HLBUXR0,B00SNH9TKO,B01HEZ5H6K,B0107BYPLG,B005ANYMG0′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’7cb2d21b-9492-11e8-b23a-8b26c4ccd908′]

C# development, Interview questions, IT/Software development

Interview question: What is the difference between GetType() and typeof()?

Posted on By DesiBanjara No Comments on Interview question: What is the difference between GetType() and typeof()?

typeof() typeof keyword takes the Type itself as an argument and returns the underline Type of the argument. System.Type t1= typeof(Event); // Event is a Type GetType() GetType() will return the given variable base data type. It can only be invoked on the instance of the type. Event event= new Event(); System.Type t2= event.GetType(); // event…

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Interview question: What is the difference between dynamic type variables and object type variables?

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Dynamic types are similar to object types except that type checking for object type variables takes place at compile time, whereas for the dynamic variables type checking take place at run time. [amazon_link asins=’9351190900,1787287041,9386873583,9351343189,8120349172,007070368X,8120352068,9352136640,B016Z18MLG|1840787198,B016Z18MLG,1491988533,1491987650,1119428114,1484230175,1119449278,1119458684,0985580135′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’23be5044-948b-11e8-b877-0dfd42244dbc’]  

C# development, Interview questions, IT/Software development

Interview question: What are dynamic type variables in C#?

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You can store any type of value in the dynamic type variable. Type checking for these types of variables takes place at runtime. Syntax: dynamic <variable_name> = value; Example: dynamic d = 20; [amazon_link asins=’9351190900,1787287041,9386873583,007070368X,8120349172,8120352068,9352136640|1840787198,1491987650,1491988533,0985580135,1509306986,1119458684,1119428114,1484230175′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’ffa1faf1-93fb-11e8-a5ca-59726084cb0d’]

C# development, Interview questions, IT/Software development

Interview question: Which class act as a base class for all the data types in .net?

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System.Object is the base class for all data types in C# Common Type System (CTS). Object is an alias for System.Object class. The object types can be assigned values of any other types, value types, reference types. Predefined or user-defined types. However, before assigning values, it needs type conversion.   [amazon_link asins=’9351190900,1787287041,9386873583,007070368X,8120349172,9351343189,8120352068,9352136640,B016Z18MLG|1840787198,B016Z18MLG,0985580135,1119458684,1484230175,1119428114,1491987650,1491988533,1119449278′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’…

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C# development, Interview questions, IT/Software development