10+ Softenger Interview Questions and Answers

The components of .NET Framework include Common Language Runtime, Class Library, and ASP.NET.

• Common Language Runtime (CLR) - manages memory, security, and execution of code

• Class Library - provides a set of reusable classes and types for building applications

• ASP.NET - a web application framework for building dynamic web pages and web services

• Other components include ADO.NET, Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF), and Windows Workflow Fou...read more

Singleton pattern ensures a class has only one instance and provides a global point of access to it.

• Characteristics include private constructor, static instance variable, static method to access instance, lazy initialization, and thread safety.

• Example: public class Singleton { private static Singleton instance; private Singleton() {} public static Singleton getInstance() { if (instance == null) { instance = new Singleton(); } return instance; }}

Use LINQ to fetch data from the 'students' table in ascending order of 'studentid'.

• Use LINQ query syntax or method syntax to retrieve data from the 'students' table.

• Order the data by 'studentid' in ascending order using the 'OrderBy' or 'OrderByDescending' method.

• Ensure that the LINQ query is executed against the database to fetch the data.

Union combines and removes duplicates, Union All combines without removing duplicates.

• Union removes duplicates from the result set, while Union All does not.

• Union is slower than Union All because it has to perform an additional step to remove duplicates.

• Union is used when you want to combine two result sets and remove duplicates, while Union All is used when you want to combine two result sets without removing duplicates.

Interfaces are a way to define a contract between classes, specifying methods and properties that must be implemented.

• Interfaces allow for polymorphism and loose coupling

• Classes can implement multiple interfaces

• Interfaces can inherit from other interfaces

• Examples include IDisposable, IEnumerable, and IComparable

Use bulk insert or batch processing to send large amounts of data through the database.

• Use bulk insert operations provided by the database management system.

• Consider using batch processing techniques to optimize performance.

• Use stored procedures or parameterized queries for efficient data transfer.

Class and object programming example

• Classes are templates for objects

• Objects are instances of classes

• Classes define properties and methods

• Objects can access and modify properties and methods

• Example: Class - Car, Object - Honda Civic

Method is a block of code that performs a specific task and can be called by other parts of the program.

• Methods are used to break down complex programs into smaller, more manageable pieces.

• They can take input parameters and return values.

• Examples of methods in C# include Console.WriteLine() and Math.Max().

Extension methods allow adding new methods to existing types without modifying the original type

• Extension methods are static methods that can be called as if they were instance methods of the extended type

• They are defined in static classes and must be in the same namespace as the extended type

• They are commonly used to add functionality to existing types or interfaces without modifying them directly

Constructor chaining is the process of calling one constructor from another constructor within the same class.

• Allows for reusing code and avoiding duplication

• Can be achieved using 'this' keyword in the constructor

• Example: public MyClass(int x) : this(x, 0) {}

CTE stands for Common Table Expressions, which is a temporary result set that can be referenced within a SELECT, INSERT, UPDATE, or DELETE statement.

• CTEs are defined using the WITH keyword in SQL.

• They help improve readability and maintainability of complex queries.

• CTEs can be recursive, allowing for hierarchical data querying.

• Example: WITH CTE AS (SELECT * FROM table_name) SELECT * FROM CTE;

• Example: WITH RECURSIVE CTE AS (SELECT * FROM table_name UNION ALL SELECT * FROM CTE) ...read more

Oops stands for Object-Oriented Programming. There are four types of OOPs concepts: Abstraction, Encapsulation, Inheritance, and Polymorphism.

• Abstraction: Hiding the implementation details and showing only the necessary information.

• Encapsulation: Wrapping data and functions into a single unit.

• Inheritance: Acquiring properties and behavior of a parent class by a child class.

• Polymorphism: Ability of an object to take many forms.

• Examples: Java, C#, Python, Ruby, etc.