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Oops concepts are the fundamental concepts of object-oriented programming.
Encapsulation - binding data and functions together
Inheritance - creating new classes from existing ones
Polymorphism - ability of objects to take on multiple forms
Abstraction - hiding implementation details from users
Interface and abstract are both used for abstraction in object-oriented programming.
Interfaces define a contract that a class must implement.
Abstract classes provide a base implementation that can be extended by subclasses.
Interfaces can be implemented by multiple classes, while a class can only extend one abstract class.
Interfaces can only have abstract methods, while abstract classes can have both abstract and concre
ArrayList is non-synchronized and Vector is synchronized.
ArrayList is faster than Vector.
Vector is thread-safe while ArrayList is not.
Vector is a legacy class while ArrayList is not.
Vector doubles its size while ArrayList increases by 50%.
ArrayList is preferred over Vector in most cases.
Boxing is the process of converting a value type to a reference type, while unboxing is the process of converting a reference type to a value type.
Boxing is done implicitly by the compiler when a value type is assigned to a reference type variable.
Unboxing requires an explicit cast from the reference type to the value type.
Boxing and unboxing can impact performance as they involve memory allocation and copying of data.
...
Garbage collection is a process in programming where the system automatically reclaims memory occupied by objects that are no longer in use.
Garbage collection helps prevent memory leaks by automatically freeing up memory that is no longer needed.
It is commonly used in languages like Java, C#, and Python.
Garbage collection can be either automatic or manual, with automatic being the most common approach.
Examples of garba...
MVC stands for Model-View-Controller, a software architectural pattern. Razor is a markup syntax used in ASP.NET MVC.
MVC is a design pattern that separates an application into three main components: Model, View, and Controller
Razor is a markup syntax used in ASP.NET MVC to create dynamic web pages
MVC helps in organizing code and separating concerns, making it easier to maintain and test applications
Software development is the process of creating, designing, testing, and maintaining software applications.
Involves writing code to create software applications
Includes designing the user interface and user experience
Testing the software for bugs and errors
Maintaining and updating the software as needed
ListView is a legacy view for displaying lists in Android, while RecyclerView is a more flexible and efficient replacement.
ListView is less efficient in terms of memory and performance compared to RecyclerView.
RecyclerView provides better performance by recycling views and separating the responsibilities of layout and data management.
RecyclerView supports more advanced features like animations and item decorations.
List...
Services and work manager are components in software development that help manage background tasks and processes.
Services are components that run in the background to perform long-running operations without affecting the user interface.
Work manager is a library that helps manage background tasks efficiently, taking into account factors like battery life and network availability.
Services can be used for tasks like downl...
Infosys interview questions for designations
I applied via Job Portal
Use the extend() method in Python to combine multiple lists into a single list.
Use the extend() method to add elements from one list to another list.
Alternatively, you can use the + operator to concatenate lists.
Example: list1 = [1, 2, 3], list2 = [4, 5, 6], combined_list = list1 + list2
Get interview-ready with Top Infosys Interview Questions
I applied via Naukri.com and was interviewed in Nov 2024. There were 2 interview rounds.
Types of classes include abstract classes, concrete classes, interface classes, and inner classes.
Abstract classes cannot be instantiated and may contain abstract methods.
Concrete classes can be instantiated and provide implementations for all methods.
Interface classes define a contract for classes to implement.
Inner classes are classes defined within another class.
I address difficult situations within a team by promoting open communication, seeking to understand all perspectives, and collaborating on solutions.
Promote open communication to address issues early on
Seek to understand all perspectives before making decisions
Collaborate with team members to find mutually beneficial solutions
I applied via Referral and was interviewed in Oct 2024. There were 2 interview rounds.
I applied via Naukri.com and was interviewed in Sep 2024. There was 1 interview round.
Kersal server is a type of server used for hosting websites and applications.
Kersal server is known for its reliability and performance.
It is often used by businesses to host their websites and applications.
Kersal server offers features like high uptime, security, and scalability.
Examples of Kersal server providers include AWS, Google Cloud, and Microsoft Azure.
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
Dependency injection helps in achieving loose coupling between classes.
It allows for easier testing and maintenance of code.
There are three types of dependency injection: constructor injection, setter injection, and interface injection.
We are using a microservices architecture in our project.
Decomposes the application into smaller, independent services
Each service is responsible for a specific function
Allows for scalability and flexibility
Example: Netflix, Amazon, Uber
Overloading is having multiple methods in the same class with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
Overloading involves multiple methods with the same name but different parameters.
Overriding involves a method in a subclass with the same name and parameters as a method in the superclass.
Overloading is resolved...
MVC architecture is implemented by separating the application into Model, View, and Controller components.
Create models to represent data and business logic
Develop views to display the user interface
Write controllers to handle user input and update the model
I applied via Naukri.com and was interviewed in Nov 2024. There was 1 interview round.
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