Altera Digital Health Interview Questions and Answers

Abstraction is the process of removing unnecessary details and focusing on essential characteristics.

• Abstraction allows us to work with complex systems by hiding unnecessary details.

• It helps in simplifying the problem-solving process.

• For example, when using a computer, we don't need to know the intricate details of how the hardware works to write a program.

Delete removes rows from a table while keeping the table structure intact, while Truncate removes all rows from a table and resets auto-increment values.

• Delete query is slower as it logs individual row deletions, while Truncate is faster as it does not log individual row deletions.

• Delete can be rolled back using a transaction, while Truncate cannot be rolled back.

• Delete query can have a WHERE clause to specify which ro...read more

I am familiar with design patterns such as Singleton, Factory, Observer, and MVC.

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

• Factory pattern creates objects without specifying the exact class of object that will be created.

• Observer pattern defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and up...read more

OOP concepts in Deep

• OOP (Object-Oriented Programming) concepts include encapsulation, inheritance, and polymorphism

• Encapsulation involves bundling data and methods that operate on the data into a single unit (object)

• Inheritance allows a class to inherit properties and behavior from another class

• Polymorphism allows objects of different classes to be treated as objects of a common superclass

Design patterns are reusable solutions to common problems in software design and implementation.

• Design patterns help in creating flexible, maintainable, and scalable software systems.

• Examples of design patterns include Singleton, Factory, Observer, and Strategy.

• Each design pattern has a specific problem it solves and a set of guidelines for its implementation.

Full project architecture implementation involves designing the overall structure of a software project.

• Identify the requirements and constraints of the project

• Design the high-level architecture including components, modules, and interactions

• Consider scalability, performance, security, and maintainability

• Choose appropriate technologies and frameworks

• Implement the architecture following best practices

• Test and validate t...read more