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Interview Questions- Object Oriented Programming (OOP) in C# 1- What is Object oriented programming? Object-oriented programming (OOP) is a programming model based on the concept of “objects”. Objects are the real world entities which can have data and some behaviour. Data we call as attributes or fields or properties. Behaviour we call as procedures…
Differences between struct and classes are: Struct Class Struct are value types; A variable of a structure type contains the structure’s data. Classes are reference types. A variable of a class type contains a reference to the data as a class type does. Struct use stack allocation. Classes use heap allocation. All struct elements are…
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What is struct in C#? A struct type is a value type that is typically used to encapsulate small groups of related variables. When an object is created from a struct and assigned to a variable, the variable contains the complete value of the struct. When a variable that contains a struct is copied, all…
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Top 20 beginner level C# interview questions What is C#? C# is a simple, modern, type-safe, managed and object oriented language, which is compiled by .Net framework for generating intermediate language (IL). It is designed to be a platform-independent language although it is implemented primarily on Windows. Its syntax is similar to C and C++…
By using Array.sort (arrayName) method. It sorts the elements in an entire one-dimensional Array using the IComparable implementation of each element of the Array. If you want to sort in descending order, First sort the array using Array.sort(arrayName) then reverse the same using Array.reverse (arrayName) method. [amazon_link asins=’9351190900,007070368X,8120352068,9386873583|1840787198,1484230175,0985580135′ template=’ProductGrid’ store=’desibanjara22-21|desibanjaraco-21′ marketplace=’IN|UK’ link_id=’66554407-915d-11e8-9dd7-b3406be566d4′]
The Array class is the base class for all the arrays in C#. It is defined in the System namespace. The Array class provides various properties and methods to work with arrays.
There are three types of array in C#: Single-Dimensional Multidimensional Jagged arrays [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’]
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’]
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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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′]