Cheil India Interview Questions and Answers

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 used for methods that return a Boolean value.

• EventHandler...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.

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 client that can make HTTP requests

• WebAPI can be used to build ...read more

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

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 cannot be called from within functions.

Singleton and Factory patterns are creational patterns used in Java to create objects.

• Singleton pattern ensures that only one instance of a class is created and provides a global point of access to it.

• Factory pattern provides an interface for creating objects, but allows subclasses to decide which class to instantiate.

• Singleton pattern can be implemented using private constructor, static method and static variable.

• Factory pattern can be implemented using an interface or abstr...read more

Generics in C# allow for type-safe programming by enabling the creation of reusable code.

• Generics allow for the creation of classes, interfaces, and methods that can work with any data type.

• They provide type safety by allowing the compiler to enforce type constraints.

• Examples include List, Dictionary, and Nullable.

• Generics can improve performance by reducing the need for boxing and unboxing operations.

The @Autowired annotation is the most useful annotation used in Spring Boot and Spring JPA.

• The @Autowired annotation is used for automatic dependency injection.

• It eliminates the need for manual wiring of beans.

• It can be used with constructors, fields, and methods.

• Example: @Autowired private UserRepository userRepository;