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Polymorphism allows methods to do different things based on the object type, enhancing flexibility in programming.
Polymorphism is a core concept in Object-Oriented Programming (OOP).
It allows methods to be defined in multiple forms.
There are two types: compile-time (method overloading) and runtime (method overriding).
Example of method overloading: a function 'add' can add integers or doubles.
Example of method over...
SQL Joins combine rows from two or more tables based on related columns, enabling complex queries and data retrieval.
INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM A INNER JOIN B ON A.id = B.id;
LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.id;
RIGHT JOIN: Returns all records from ...
An immutable class is a class whose instances cannot be modified after creation, ensuring data integrity and thread safety.
Immutable classes prevent changes to their state after creation, e.g., String in Java.
They often provide methods to return new instances with modified values, e.g., LocalDate in Java.
Immutable objects are inherently thread-safe, reducing synchronization issues.
Commonly used in functional progr...
Identify and resolve memory leaks through systematic analysis and debugging techniques.
Monitor memory usage over time using tools like VisualVM or JProfiler to identify abnormal growth patterns.
Use profiling tools to analyze heap dumps and identify objects that are not being released, such as in Java applications.
Review code for common memory leak patterns, such as static collections holding references to objects ...
Spring Boot simplifies Java application development with rapid setup, microservices support, and built-in features.
Rapid Development: Spring Boot reduces boilerplate code, allowing developers to create applications quickly. For example, using Spring Initializr.
Microservices Architecture: It supports building microservices, enabling scalable and maintainable applications. For instance, Netflix uses Spring Boot.
Embe...
Interfaces define contracts for classes, while abstract classes provide a base with shared code and can have implemented methods.
An interface can only declare methods, while an abstract class can declare methods and provide some implementation.
A class can implement multiple interfaces but can inherit from only one abstract class.
Interfaces are used for defining capabilities (e.g., Comparable), while abstract class...
A HashMap in Java uses a hash table to store key-value pairs, allowing for efficient data retrieval.
1. Structure: HashMap uses an array of buckets to store entries, where each bucket is a linked list or tree.
2. Hashing: Keys are hashed to determine their bucket index, using the hashCode() method.
3. Collision Handling: If two keys hash to the same index, they are stored in the same bucket, handled via chaining (lin...
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
Objects: Instances of classes that encapsulate data and behavior.
Classes: Blueprint for creating objects, defining their properties and methods.
Inheritance: Ability of a class to inherit properties and behavior from another class.
Polymorphism: Ability to present the same in...
Access modifiers in C# are keywords used to specify the accessibility of classes, methods, variables, etc.
There are five access modifiers in C#: public, private, protected, internal, and protected internal.
Public: accessible from any other code in the same assembly or another assembly.
Private: accessible only within the same class or struct.
Protected: accessible within the same class or by derived classes.
Internal...
I am open to any location that offers opportunities for growth and learning.
Open to relocation for the right opportunity
Prefer locations with strong tech industry presence
Interested in cities known for innovation and technology hubs
DevOps roles involve collaboration between development and operations teams to streamline software delivery.
Collaborate with development and operations teams to ensure smooth software delivery
Automate processes to increase efficiency and reduce errors
Monitor and analyze system performance to identify areas for improvement
Implement and maintain continuous integration and delivery pipelines
Ensure security and compliance ...
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...
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
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
Cloning Oracle E-Business Suite R12.2 involves several key steps for replication and maintenance.
1. Prepare the source instance by ensuring it is in a stable state.
2. Create a backup of the source database and application files.
3. Use the Rapid Clone utility to clone the instance.
4. Update the configuration files for the new instance.
5. Run post-cloning scripts to finalize the setup.
6. Verify the cloned instance by per...
Steps to resolve tablespace issues and phases of ADOP in application development.
Monitor tablespace usage regularly to anticipate issues before they arise.
Increase the size of the tablespace by adding data files.
Archive or purge old data to free up space.
Implement partitioning to manage large tables more effectively.
Review and optimize database queries to reduce space consumption.
In ADOP, phases include: Prepare, Apply...
I applied via Referral and was interviewed in Oct 2024. There were 2 interview rounds.
I expect a challenging role that fosters growth, collaboration, and innovation in technology analysis.
Opportunities for professional development, such as training programs or workshops.
A collaborative work environment where team members share ideas and insights.
Involvement in innovative projects that push the boundaries of technology.
Clear communication from leadership regarding company goals and expectations.
A culture...
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
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