Wabtec Senior Software Engineer Interview Questions, Process, and Tips

Delegates are reference types that hold a reference to a method. They are used to achieve loose coupling and event handling.

• Delegates allow methods to be passed as parameters to other methods.

• They can be used to define callback methods.

• Built-in delegates in C# include Action, Func, Predicate, EventHandler, and Comparison.

• Action and Func are used for methods that return void and non-void values respectively.

• Predicate is...read more

Dictionary is a generic collection while Hashtable is a non-generic collection.

• Dictionary is type-safe while Hashtable is not.

• Dictionary allows null keys and values while Hashtable does not.

• Dictionary is faster than Hashtable for small collections.

• Hashtable is thread-safe while Dictionary is not.

Stored procedures are used to perform a set of actions, while functions return a single value.

• Stored procedures can modify data in the database, while functions cannot.

• Functions can be used in SQL statements, while stored procedures cannot.

• Stored procedures can have input and output parameters, while functions can only have input parameters.

• Functions can be called from within stored procedures, but stored procedures ca

Program to find the number of occurrences in a given string

• Use a loop to iterate through the string and count the occurrences of each character

• Store the count in a dictionary or hash table

• Return the dictionary or hash table

RESTful services are web services that follow the REST architecture while WebAPI is a framework for building RESTful services.

• RESTful services use HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations on resources

• WebAPI is a framework for building RESTful services using .NET framework

• WebAPI provides features like routing, model binding, content negotiation, etc.

• RESTful services can be consumed by any clie...read more