Damco Solutions Software Engineer Interview Questions and Answers

Django request response cycle is the process of handling a request and generating a response in Django web framework.

• Client sends a request to the server.

• The request is received by the Django server.

• Django uses URL patterns to match the requested URL to a view function.

• The view function processes the request and returns an HTTP response.

• The response is sent back to the client.

Private variables are defined using access modifiers to restrict their access within a class.

• Use the 'private' keyword to define a private variable

• Private variables can only be accessed within the class they are defined in

• Private variables are often used to encapsulate data and prevent direct access from outside the class

I work on Visual C# 2019.

• I primarily work on Visual C# 2019 for my software development projects.

• I have experience with Visual C# 2017 and earlier versions as well.

• Visual C# 2019 offers new features and improvements over previous versions.

Lists and tuples are similar but tuples are immutable. Arrays are fixed size while lists are dynamic.

• Lists and tuples are both used to store collections of data.

• Tuples are immutable, meaning their values cannot be changed once created.

• Lists are dynamic and can be resized during runtime.

• Arrays are fixed size and can only store elements of the same data type.

• Lists and arrays can be indexed and sliced to access specific elements.

• Example: list = [1, 2, 3], tuple = (4, 5, 6), arra...read more

Oops concept is a programming paradigm based on the principles of abstraction, encapsulation, inheritance, and polymorphism.

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

• Encapsulation: Binding the data and methods together to protect the data from outside interference.

• Inheritance: Creating a new class from an existing class to reuse the code and add new features.

• Polymorphism: Using a single interface to represent differe...read more

Django signals allow certain senders to notify a set of receivers that some action has taken place.

• Signals allow decoupled applications to get notified when certain actions occur elsewhere in the application

• They are used to avoid coupling between applications

• Signals are defined by providing a receiver function which gets called when the signal is sent

• Example: A signal can be sent when a new user is created, and a receiver function can be defined to send a welcome email to the...read more

A decorator is a design pattern that allows behavior to be added to an individual object, either statically or dynamically.

• Decorators wrap an object to modify its behavior.

• They provide a flexible alternative to subclassing for extending functionality.

• Python has built-in support for decorators, which are denoted by the @ symbol.

• Examples of decorators include @staticmethod, @classmethod, and @property.

Pull is when the client initiates the request for data, while push is when the server sends data without a request.

• Pull: Client initiates request for data

• Push: Server sends data without request

• Pull: Used in polling mechanisms

• Push: Used in real-time communication systems