Category: Interview questions

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

July 30, 2018 DesiBanjara No Comments

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’…

C# development, Interview questions, IT/Software development

Interview question: Can we assign null value into value type variable?

July 30, 2018 DesiBanjara No Comments

No we cannot assign null value into value type variable, but we can assign null values into reference type variable. [amazon_link asins=’9351190900,8120352068,9352136640,007070368X,B078NRPJT6,B0072T3X38,B011V10Z2O,B06X6JTX4B,B01FFQ1FS4,B0719KCBZT|1840787198,1491988533,1491987650,1484230175,B00IAGBTZQ,B00UNEHS44,B01AWLB1PY,B01N0AKAYE,B00SX8GSGG’ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’20ae0718-93c0-11e8-baef-7374f0f50c99′]

C# development, Interview questions, IT/Software development

Interview question: What is the difference between ref and out parameters?

July 30, 2018 DesiBanjara No Comments

Reference parameter (Ref parameter) copies the reference to the memory location of an argument into the formal parameter. This means that changes made to the parameter affect the argument. Output parameters are similar to reference parameters, except that they transfer data out of the method rather than into it. [amazon_link asins=’9351190900,9352136640,8120349172,007070368X,B076HG97KS,B019MQLUZG,B079R17XY2,B01N3BN5E8|1840787198,1484230175,1491987650,1491988533,B00IAGBTZQ,B01AWLB1PY,B00UNEHS44,B01N0AKAYE’ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’68ddef8e-93bc-11e8-92e5-1f0ecc2f4de5′]

C# development, Interview questions, IT/Software development

Interview question: Can you return multiple values from a function in C#?

July 30, 2018 DesiBanjara No Comments

Yes, by using output parameters, we can return multiple values from a function in C#. A return statement can be used for returning only one value from a function. However, using output parameters, you can return two values from a function. [amazon_link asins=’007070368X,9352136640,1787287041,8120349172,B078NRPJT6,B011V10Z2O,B011V135LM,B0719KCBZT|1840787198,1491987650,1491988533,1119449278,B01AC6P7OU,B00RCIU1S4,B0036DUP1M,B06Y1V7SZC’ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’085f5b85-93b9-11e8-9df3-cd704103ff25′]

C# development, Interview questions, IT/Software development

Interview question: In how many ways you can pass parameters to a method?

July 30, 2018 DesiBanjara No Comments

There are three ways we can pass parameters to a method: Value parameters – This method copies the actual value of an argument into the formal parameter of the function. In this case, changes made to the parameter inside the function have no side effect on the argument. Reference parameters – This method copies the…

C# development, Interview questions, IT/Software development, Web development

Interview question: What is Jagged Array in C#?

July 30, 2018 DesiBanjara No Comments

A jagged array is an array whose elements are arrays. The elements of a jagged array can be of different dimensions and sizes. A jagged array is also called an “array of arrays”. You can initialize a jagged array as – int [ ][ ] myArray = new int [2][ ] {new int [ ]{10,11,12},…

C# development, Interview questions, IT/Software development, Web development

Interview question: Describe the difference between a Thread and a Process?

July 29, 2018 DesiBanjara No Comments

A thread can do anything a process can do. But since a process can consist of multiple threads, a thread could be considered a ‘lightweight’ process. So the essential difference between a thread and a process is the work that each one is used to accomplish. Threads are used for small tasks, whereas processes are…

C# development, Interview questions, IT/Software development

Interview question: What is mean by operators in C#?

July 29, 2018 DesiBanjara No Comments

Operators, in C#, are symbols used within an expression or statement to specify the operations to be performed during evaluation of the expression. Operators are program elements that can be applied to one or more operands in an expression to perform computations. The operands used with the operator can be literals, fields, local variables and…

C# development, Interview questions, IT/Software development

Interview question: What is the use of “using” keyword in C#?

July 29, 2018 DesiBanjara No Comments

In C#, we use “using” keyword for two different purpose. “Using” keyword is used to include a namespace in the program. A program generally has multiple using statements. The using statement is used to obtain a resource, execute a statement, and then dispose of that resource. Example: using (SqlConnection dbConn = new SqlConnection(conn)){ // Your…

C# development, Interview questions, IT/Software development

Interview question: What are the namespaces in C#.NET?

July 27, 2018 DesiBanjara No Comments

Define namespace? What are the namespaces in C#.NET? Namespace is a logical grouping of classes. The namespace is a container which will be used to organize the hierarchal set of .Net classes. Namespace is designed for providing a way to keep one set of class names separate from another. The class names declared in one…

C# development, Interview questions, IT/Software development