Tech Mahindra Senior Software Engineer Interview Questions, Process, and Tips

A closure is a function that has access to its own scope, as well as the outer scope in which it was defined.

• A closure allows a function to access variables from its outer function even after the outer function has finished executing.

• Closures are commonly used in JavaScript for data encapsulation and creating private variables.

• Example: const outerFunction = () => { const outerVar = 'I am outer'; return () => { console....read more

Virtual DOM is a lightweight copy of the actual DOM in memory, used for efficient updates in web development.

• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• Changes are first made to the virtual DOM, then compared with the actual DOM to only update what has changed.

• This process helps reduce re-rendering of the entire page, leading to faster and more e

There is no one-size-fits-all answer to this question as it depends on the specific project requirements.

• ORMs like Hibernate are popular for Java projects

• Django ORM is widely used for Python projects

• Entity Framework is commonly used for .NET projects

• Consider factors like performance, ease of use, and community support when choosing an ORM

• Ultimately, the best ORM is the one that fits the project's specific needs

SOLID principles ensure maintainable and scalable code. Dependency Injection helps in achieving loose coupling and testability.

• SOLID principles are Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion

• Dependency Injection is a design pattern that allows objects to be loosely coupled and easily testable

• Use Dependency Injection to reduce tight coupling between classes an...read more

Design patterns are reusable solutions to common software problems.

• Creational patterns: Singleton, Factory, Abstract Factory

• Structural patterns: Adapter, Decorator, Facade

• Behavioral patterns: Observer, Strategy, Command

• Architectural patterns: Model-View-Controller, Model-View-ViewModel

• Concurrency patterns: Thread Pool, Producer-Consumer, Future