20+ Global DA Solutions Interview Questions and Answers

Abstract class and Interface are both used for abstraction, but with some differences.

• Abstract class can have both abstract and non-abstract methods, while Interface can only have abstract methods.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Abstract class can have instance variables, while Interface cannot.

• Abstract class provides partial implementation, while Interface provides full abstraction.

• Example of using Abstract class: Creat...read more

Modifying the POCO class allows extending the entity with additional properties.

• To add extra properties, simply modify the POCO class by adding new properties.

• Ensure that the changes are reflected in the database schema if necessary.

• Update any existing code that interacts with the POCO class to handle the new properties.

• Consider the impact on serialization, validation, and any other relevant aspects.

Yes

• Use AJAX or WebSocket to send file data to the server

• Track the progress of the file upload using the 'progress' event

• Calculate the percentage of completion based on the total file size and the amount uploaded

Singleton class ensures only one instance is created, while static class allows multiple instances.

• Singleton class restricts instantiation of a class to a single object.

• It provides a global point of access to the instance.

• It is useful when only one instance of a class is required throughout the system.

• Singletons can be lazy-loaded or eagerly-loaded.

• Static classes allow multiple instances and are not suitable for maintaining state.

• Static classes are useful for utility function...read more

Generics should be used when you want to create reusable code that can work with different types.

• Generics allow you to write code that can work with different types without sacrificing type safety.

• They provide compile-time type checking, reducing the chances of runtime errors.

• Generics promote code reusability and maintainability by allowing you to write generic algorithms and data structures.

• Using generic classes in .NET can improve performance by avoiding unnecessary boxing ...read more

Yes, I have worked on Entity Framework.

• I have used Entity Framework version 6.0 in my previous project.

• I have experience in designing and implementing database models using Entity Framework.

• I have used LINQ to query and manipulate data in Entity Framework.

• I have also worked with migrations and code-first approach in Entity Framework.

I have used the Observer design pattern in my current project.

• Observer pattern is used to establish a one-to-many dependency between objects.

• It allows multiple objects to be notified and updated automatically when a subject object changes its state.

• In my project, we implemented the Observer pattern to notify various components of the system about changes in data.

• For example, when a user updates their profile information, the Observer pattern is used to notify all relevant com...read more

Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.

• Array has a fixed length, while ArrayList can dynamically resize.

• Array can store both primitive and object types, while ArrayList can only store object types.

• Array uses square brackets [] for declaration, while ArrayList uses angle brackets <>.

• Array is more memory efficient than ArrayList.

• Array provides direct access to elements using index, while ArrayList requires methods like get(...read more

The core components of .Net Framework include Common Language Runtime (CLR), Framework Class Library (FCL), and ASP.NET.

• Common Language Runtime (CLR) provides the runtime environment for executing .NET applications.

• Framework Class Library (FCL) is a collection of reusable classes, interfaces, and value types that provide access to system functionality.

• ASP.NET is a web application framework for building dynamic web pages and web services using .NET technologies.

GC stands for Garbage Collection. It is an automatic memory management process in programming languages.

• GC is responsible for reclaiming memory that is no longer in use by the program.

• It identifies and frees up memory occupied by objects that are no longer reachable.

• GC has different algorithms like Mark and Sweep, Copying, and Generational.

• The life cycle of an object involves creation, usage, and eventual garbage collection.

• GC can be triggered by various conditions like memor...read more

T4 templates are used to generate code or text files based on a template and input data.

• T4 templates automate repetitive code generation tasks.

• They can be used to generate code for data access layers, service layers, or UI components.

• T4 templates can also be used to generate configuration files or documentation.

• They provide a way to separate the logic from the generated output.

• T4 templates support customizing the generated code based on input parameters or conditions.

The page life cycle of ASP.Net is a series of events that occur when a web page is requested and processed by the server.

• The page life cycle consists of several stages such as initialization, loading, postback handling, rendering, and unloading.

• During the initialization stage, the page and its controls are created and their properties are set.

• In the loading stage, the page retrieves and processes the user input and updates the control state.

• If there is a postback, the postbac...read more

SOLID is a set of principles for designing software that is easy to maintain, understand, and extend.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open-Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Subtypes must be substitutable for their base types.

• I - Interface Segregation Principle: Clients should not be forced to depend on interfaces they do not use.

• D...read more

ViewBag and ViewData are used to pass data from controller to view in ASP.NET MVC.

• ViewBag is a dynamic object while ViewData is a dictionary object.

• ViewBag uses dynamic properties while ViewData uses string keys to store data.

• ViewBag is a shortcut to ViewData['key'] while ViewData requires casting to access data.

• ViewBag is not type-safe while ViewData is type-safe.

• ViewBag is used for one-way communication while ViewData is used for two-way communication.

Lifecycle refers to the stages of a software development process. Multithreading is the ability of a program to perform multiple tasks simultaneously. A service is a program that runs in the background and performs specific tasks.

• Lifecycle includes planning, design, development, testing, deployment, and maintenance.

• Multithreading allows for faster and more efficient processing of tasks.

• Services can be used for tasks such as managing network connections or sending notification...read more

A program to calculate factorial

• Take input from user

• Use a loop to multiply the number with its previous number until 1 is reached

• Print the result

BRD defines what needs to be done, FRD details how it will be done, user stories describe specific user interactions.

• BRD (Business Requirements Document) outlines high-level business objectives and goals.

• FRD (Functional Requirements Document) details specific functionalities and features to achieve the objectives outlined in the BRD.

• User stories are short, simple descriptions of a feature told from the perspective of the person who desires the new capability, usually a user o...read more

Adobe XD can be system tested using automated testing tools like Selenium or Appium.

• Automated testing tools like Selenium or Appium can be used to test Adobe XD

• System testing can help identify bugs and ensure the software is functioning as expected

• Test cases can be created to cover different scenarios and user interactions

• Regression testing can be performed to ensure new updates or changes do not break existing functionality

Opps concept refers to Object-Oriented Programming Principles.

• Encapsulation: Hiding the implementation details of an object from the outside world.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: The ability of objects to take on many forms, allowing them to be used in different ways.

• Abstraction: Focusing on the essential features of an object, ignoring the irrelevant details.

Sitecore SXA supports three types of publishing: Full, Incremental, and Smart.

• Full publishing: Publishes all items and their related items.

• Incremental publishing: Publishes only the items that have changed since the last publish.

• Smart publishing: Publishes only the items that have changed and their related items.

• Examples: Publishing a page and its related components, publishing a media item and its related renditions.

Best practices for BLE integration include proper error handling, optimizing power consumption, using background services, and implementing security measures.

• Implement proper error handling to gracefully handle connection issues and other errors.

• Optimize power consumption by minimizing data transfer and using low-power modes when possible.

• Use background services to ensure BLE functionality continues even when the app is in the background.

• Implement security measures such as en...read more